CN110147058B - A kind of single chip timing chip borrowing WiFi module - Google Patents

Abstract

The invention discloses a single-chip timing chip borrowed from a WiFi module. The single-chip timing control is added to connect with an ESP-12 WiFi module through an I2C two-wire interface. The ESP-12 WiFi module can be wirelessly connected to a mobile phone or a computer to realize convenient and intuitive multiple timings set up. This kind of WiFi module can be designed as a general module (one can set a variety of microcontroller timings), and only connect it when setting or timing check and confirmation, usually not used. This single-chip timing does not require a clock setting component (a display screen and a key group are omitted), which makes the structure simple and the cost reduced. It also emphasizes the disclosure of relevant technical information of script programs, so that this single-chip timing chip becomes a general-purpose chip, and users can adapt the setting interface by themselves.

Description

A kind of single chip timing chip borrowing WiFi module

technical field

The invention relates to the technical field of automatic control of electrical appliances, in particular to a single chip timing chip using a WiFi module.

Background technique

Although the Internet of Things has been exaggerated by business, it has contributed to the development of network technology towards simplicity and refinement, and has also benefited non-Internet fields. For micro-controlled electrical appliances and typical single-chip applications, in order to achieve more convenient and intuitive settings (regular time setting operation, it is easy to forget due to the simple display screen, overlapping key functions, and lack of editing keyboards such as digital time formats) or human-computer interaction, The application of the single-chip microcomputer is coupled with WiFi to connect the mobile phone or computer, so as to remove the high-cost and bulky display screen and key group, so that the casing becomes smaller and the design is simplified. This idealized solution is very impractical, because the technical difficulty of connecting a mobile phone or a computer with WiFi far exceeds the technical content of a typical application of a microcontroller. However, this situation no longer exists with the popularization of the ESP-12 WiFi microcontroller (ESP8266) module. , a new single-chip + WiFi application mode has come, and the present invention will start with a typical timing application.

SUMMARY OF THE INVENTION

Based on the above background technology, the present invention provides a single chip timing chip using a WiFi module.

The technical scheme adopted by the present invention is as follows: a single-chip timing chip borrowed from a WiFi module, the single-chip timing chip is used to set the timing control function by means of a mobile phone or a computer through a matching WiFi connection module before use;

The single-chip timing chip is a timing control chip programmed by a single-chip computer. It has an I2C (slave) two-wire serial bus interface, which is used to connect the matching WiFi connection module, and realize the timing function setting, timing check confirmation, adjustment with a mobile phone or computer. to view or modify the reset;

The matching WiFi connection module is an ESP-12 WiFi module, which is programmed to define a two-wire serial bus interface with I2C (master) for connecting to the I2C (slave) interface of the single-chip timing chip;

The data in the microcontroller is actively transmitted to the mobile phone or computer using (I2C) SCL upper edge interrupt notification ESP-12 and HTML5+JS SSE server push technology;

At different times, a WiFi connection module can be connected with a plurality of the single-chip timing chips, and only connect it when the set timing function needs to be changed or the timing check is confirmed. Usually, the single-chip timing chip does not need the WiFi connection module when working;

When the single-chip timing chip works independently of the WiFi connection module, only one start button and one or more working status indication LEDs are required; the start button operation includes short press (less than 0.5 seconds), long press (more than 0.5 seconds), or successive Short press combined to see the working status indicator LED to realize multi-function selection start; the IO ports of the single chip timing chip are respectively connected with the start button and the working status indicator LED;

The single-chip timing chip has a flash EEPROM of more than 1K, which is used to save the set start-stop time, cycle period, starting point time, and remote control infrared code record, which will not be lost when power off; Mobile phone or computer, the time on it will be synchronized to the MCU timing chip, or start at the set time as the starting point of time, more applications do not need a real-time clock, as long as the delay after startup;

ESP-12WiFi module is programmed with NODEMCU firmware and LUA scripting language. It is open source and published. It provides SSE program examples including HTML5+JS and I2C (master) two-wire serial bus interface to trigger and start reading the bytes sent by SCL up-edge interrupt. The program example, in order to allow users to rewrite the more suitable operation interface (HTML5) with scripting language;

Mobile phone or computer WiFi connection ESP-12 module adopts WiFi direct connection (AP/STATION) mode, ESP-12 WiFi module includes HTTP service, mobile phone or computer does not need to download and install APP, as long as the browser accesses 196.168.4.1 or 196.168.x.x, Among them, 196.168.x.x is defaulted or designated by the wireless router DHCP; it does not involve third-party network services, and does not require an external network connection;

The method to connect the ESP-12 module with the WiFi of the mobile phone or computer is as follows:

Before the start of the MCU timing chip, first use the mobile phone or computer to set the time or timing function, so it is necessary to connect the matching WiFi connection module; 12345678, make a WIFI connection, after the connection is successful, open the browser to access 196.168.4.1, after entering the operation interface, you can set the time or timing function; then, put the local wireless router WIFI connection name and password into the matching WiFi connection module , so that it will automatically connect to the local WIFI every time it is connected to the matching WiFi connection module; after the setting is successful, write down the (DHCP) IP address (196.168.x.x) used. ESP-12 connection, still connected to the original local WIFI, when the mobile phone or computer needs to be set online again, just use the browser to access and write down the (DHCP) IP address 196.168.x.x used;

When the mobile phone or computer enters the setting interface, there will be dynamic operation prompts, including direct test effect or setting confirmation; after the setting is satisfactory, remove the WiFi connection module, and the start and stop work in future use only needs to press the start button connected to the microcontroller and observe the LED working status. instructions;

When the mobile phone or computer sets the time or timing, the HTML5 standard time control will appear, just select: month, day, hour, minute, a number in the week, or directly input the number.

Further, timing settings include the following typical formats:

[[date][time]]function1:duration1[function2:duration2][function3:duration3]…[stop duration]…

or

[date] on time 1 - off time 1 [function/parameter 1]

[Date] On Time 2 - Off Time 2 [Function/Parameter 2]

…

[] indicates that it can be defaulted, and defaults to common values; functions/parameters can include multiple values.

Further, the I2C (master) two-wire serial bus interface of the matching WiFi connection module includes a plug-in component designed with a four-core socket, and the arrangement of the four-core socket is specified as: +, SCL, SDA, -; In addition, it also includes an additional USB connection interface for programming the ESP-12 through the RS serial port of the ESP-12;

For micro-current microcontroller control, the power supply below 5V cannot drive the ESP-12 WiFi module. This WiFi connection module includes a 3.7V lithium battery power supply, and a charging port or power plug;

Considering that the user will not unplug the WiFi connection module immediately, the WiFi connection module also includes no operation delay to enter the ultra-low power consumption mode, or use a mobile phone or computer to set the ESP-12 in the WiFi connection module to enter the ultra-low power consumption mode, wake up Either via the RST button on the ESP-12 or unplug and plug again.

Further, the single-chip microcomputer adopts STC15 series single-chip microcomputer, including 8-pin package, of which two pins P3.3 (SDA), P3.4 (SCL) are used as I2C slave communication ESP-12 WiFi connection module, P3.0, P3 .1 Except for connecting the two pins to the computer during programming, P3.0 is usually used as the start button on the timer, P3.1 is used as the working status indicator LED on the timer, and P3.2 and P3.5 control the output, or P3.2 Infrared code sending learning record.

Further, if the single-chip timing chip is used as a timing ultrasonic microporous atomization humidification device, the drive of the related ultrasonic microporous atomization sheet, the humidity detection, and the drive of the low-voltage DC fan, the connection is realized by the STC15W104 class 8-pin single-chip microcomputer. The method is as follows: the port P3.1 of the single-chip microcomputer outputting a PWM rectangular wave of 110KHz is connected to the gate G of the MOS transistor Mos1, the source S of the MOS transistor Mos1 is grounded, and the drain D of the MOS transistor Mos1 is connected to the primary end of the high-frequency step-up transformer B. The other end of the primary B is connected to +12V, and the secondary ends of the high-frequency step-up transformer B are connected in parallel with the two ends of the ultrasonic microporous atomizer W;

Humidity detection adopts DHT11 bus interface digital humidity sensor, the single-chip microcomputer port P3.2 is connected to the only data line of DHT11, the other two pins of DHT11 are grounded, and the other is connected to the single-chip power supply (3.3V) + terminal;

MCU output port P3.0 series current limiting resistor R2 is connected to the gate G of the MOS tube Mos2, the source S of the MOS tube Mos2 is grounded, the drain D of the MOS tube Mos2 is connected to the negative electrode of the DC fan F, and the positive electrode of the DC fan F is connected to +12V;

If the MCU timing chip is used as a timing infrared remote control and a learning-type coding record, the connection method realized by the STC15W104 type 8-pin MCU is as follows: the output port of the MCU P3.5 series current limiting resistor is connected to the negative end of the infrared emission LED, and the positive end of the infrared emission LED Connect to the power supply + terminal of the single-chip microcomputer; the output terminal of the infrared receiver (HS0038) is connected to the port P3.2 of the single-chip microcomputer.

The beneficial effects of the invention are: the typical single-chip timing application is connected to a mobile phone or a computer by means of WiFi to realize various timing settings, the operation is convenient and intuitive, and the single-chip system can also remove the high-cost and bulky display screen and key group, so that the shell becomes Small and simplified design. Because this single chip timing chip can realize various timing settings by using a mobile phone or a computer, it has versatility and eliminates the need for user single chip programming. And the user can also rewrite the more suitable operation interface (HTML5) with the scripting language.

Description of drawings

Figure 1 is the connection diagram of the ESP-12 WiFi connection module and the STC15 series MCU timing chip.

Fig. 2 is the driving of the timing ultrasonic micro-porous atomizing sheet, the driving of the low-voltage DC fan, and the humidity detection realized by the MOS tube of the single-chip microcomputer.

Detailed ways

Connect the MCU timing control application to the mobile phone or computer through WiFi to achieve personalized settings. The specific technical route (Figure 1): ESP-12WiFi module can realize WiFi connection to mobile phone or computer. Section) Communications.

STC15 series microcontrollers are domestic microcontrollers with extremely high cost performance, especially those in 8-pin packages, including SMD packages, which are inexpensive and do not take up space. For STC15 series 8-pin MCU, the recommended connection method is: pins P3.3 (SDA) and P3.4 (SCL) as I2C slave (slave) communication ESP-12WiFi module, except for the two pins P3.0 and P3.1 Keep it connected to the computer when programming, usually P3.0 is used as the start button on the micro-control timing appliance, P3.1 is used as the LED working status indicator on the micro-control timing appliance, P3.2, P3.5 control the output, or P3 .2 Infrared coding learning record.

Select STC15 series MCU + ESP-12WiFi module, usually work on STC15 series MCU, ESP-12WiFi module is only used when it is necessary to connect a mobile phone or computer.

For some users with few settings, the connection between the ESP-12WiFi module and the microcontroller only needs a four-core cable; for most of the users who need personalized settings, the ESP-12WiFi module is usually made into a plug-in small plug-in (referred to as WiFi plug-in module), it has a four-pin socket: two I2C communication, two positive and negative power supply, arranged as: +, SCL, SDA, -, there are many ready-made four-pin sockets (such as USB). For the convenience of programming, a USB connection interface (the RS serial port of ESP-12, which can also include RS-USB conversion) for programming ESP-12 is added to the computer through the RS serial port of ESP-12. WiFi plug-in modules are often sold together with a matching programmed microcontroller timing chip.

The WiFi plug-in module (at different times) can be used for multiple applications. The ESP-12 includes a variety of timing application supporting setting programs (which one is selected by the menu on the mobile phone screen). The set parameters can be directly written to In the EEPROM of the STC microcontroller, there are also those stored in the connected mobile phone or computer (HTML5 local storage), so that the current settings can be recalled.

Using I2C communication, the RS serial port is reserved for the ESP-12 to be connected with the computer to adjust the program more conveniently. Furthermore, the STC's 8-pin single-chip microcomputer does not have an RS serial port.

The I2C communication protocol is divided into master (master)-slave (slave) machine. The ESP-12 module provides the host I2C. The STC microcontroller just has pins that can trigger interrupts on the upper and lower edges. It is very convenient to implement the slave I2C (slave) by programming. But (unlike the RS serial port of duplex communication) the microcontroller cannot actively (randomly) send information to the ESP-12 module through the slave I2C (slave). When the module sends information, the interrupt request is sent first; on the other end, in the case that the ESP-12 module has defined I2C, the SCL pin is defined to have the function of upper-edge interrupt triggering. Once (when the microcontroller wants to send a message to the ESP-12 module) When the SCL pin of the ESP-12 module is pulled up and interrupted, the interrupt function of the SCL pin is immediately disabled, and the host I2C (master) read process is started, and the microcontroller side is always in the slave I2C (slave) The state can be sent according to the SCL clock pulse at any time in conjunction with the SDA serial bit of the data.

Similarly, due to the use of HTTP network communication protocol, the ESP-12 module (the ultra-miniature HTTP server using WiFi direct connection) cannot actively (randomly) send information to the mobile phone or computer (the browser). For this reason, HTML5+JS SSE is used. (Server Push) technology.

After these two communication protocols realize the bidirectional transmission of data between the MCU and the mobile phone or computer, the ESP-12 module finally realizes the connection between the pluggable interface of only four wires and the MCU control system, and also includes the power supply and the power supply of the ESP-12 module. Plug and pull fixed.

The single-chip (timing chip) system can be simplified to only one start button and one or two working status indication LEDs. For multi-function selection to start, you can see the status indicator LED by short press to rotate, or long press.

Regarding the single chip timing chip used as the drive of the ultrasonic microporous atomizer, the humidity detection, and the drive of the low-voltage DC fan (these drives are typical), the STC15W104 type 8-pin single chip can also be compactly realized: (in Figure 2) Micro The controller MCU outputs 108KHz PWM rectangular wave port P3.1 The series current limiting resistor R1 is connected to the gate G of the MOS transistor Mos1, the source S of the MOS transistor Mos1 is grounded, and the drain D of the MOS transistor Mos1 is connected to the primary end of the high-frequency step-up transformer B, B The other end of the primary is connected to +12V, and the secondary ends of the high-frequency step-up transformer B are connected in parallel with the two ends of the ultrasonic microporous atomizer W (some are connected in parallel with the capacitor C for resonance compensation, or some are connected in series with the inductance L to weaken the coupling with the primary).

Humidity detection adopts DHT11 bus interface digital humidity sensor, microcontroller MCU port P3.2 is connected to the only data line of DHT11 (P3.2 has the upper and lower edge interrupt function, suitable for a bus interface driver), the other two of DHT11 One of the root pins is grounded, and the other is connected to the microcontroller power supply (3.3V) + terminal.

Microcontroller MCU output port P3.0 series current limiting resistor R2 is connected to the gate G of the MOS tube Mos2, the source S of the MOS tube Mos2 is grounded, the drain D of the MOS tube Mos2 is connected to the negative pole of the DC fan F, and the positive pole of the DC fan F is connected to +12V ( DC motor fans also need parallel capacitors or reverse diodes to absorb reverse high voltage).

The reason why ultrasonic microporous atomization, temperature (DHT11 also has temperature detection), humidity detection, and fan are put together, because these three functions are combined to play an important role in seed germination and seedling raising, and can form germination/seedling humidification. experimental box.

STC15W104's P3.3 (up and down edge interrupt) is used as SDA, P3.4 (only falling edge interrupt) is used as SCL, and is connected to the I2C (Slave) four-core socket.

P3.0 and P3.1 of STC15W104 do not affect the connection to the computer programming program except that the series current limiting resistor is connected to the gate of the MOS tube (the gate of the MOS tube is high resistance and also has a series resistance).

About single chip timing chip used as infrared remote control and learning coding record: microcontroller MCU output port P3.5 series current limiting resistor is connected to the negative end of the infrared emission LED, and the positive end of the infrared emission LED is connected to the + end of the microcontroller power supply; infrared receiving The output terminal of the head (HS0038, PC838, etc.) is connected to port P3.2, the other two pins of the infrared receiving head are grounded, and the other is connected to the microcontroller power supply (3.3V) + terminal, the circuit is similar to Figure 2 (remove two MOS Tube).

Instructions:

The method to connect the ESP-12 module with the WiFi of the mobile phone or computer is as follows:

Before the MCU timing chip starts to work, first set the time or timing function with a mobile phone or computer, so it is necessary to connect the matching WiFi connection module. If you connect for the first time, the mobile phone or computer will find ESP-12, no password or 12345678 in the wireless network settings, and make a WIFI connection. After the connection is successful, open the browser to access 196.168.4.1 (the IP of the ESP-12’s WIFI connection AP mode), After entering the operation interface, you can set the time or timing function. Next, the common practice is to put the local wireless router WIFI connection name and password into the matching WiFi connection module (ESP-12's WIFI connection STATION mode), so that it will automatically connect to the local WIFI (wireless) after each connection. After the setting is successful, write down the (DHCP) IP address used (eg: 196.168.0.103), after that, the mobile phone or computer does not need to enter the wireless network settings to find the ESP-12 connection, but still connect to the original local WIFI, when the mobile phone or computer Or when the computer wants to set up online again, just use the browser to access 196.168.0.103. Note: The AP and STATION mode of the WIFI connection of the ESP-12 module here is the so-called WiFi direct connection method (no need to connect to the external network, no third-party service, and does not affect the mobile phone or computer to access the external network).

The above is connected to the WiFi connection module, and the timing function of the microcontroller is set online with the WiFi of the mobile phone or computer, which is referred to as online for short. When online, there will be dynamic operation prompts, including direct test effect or setting confirmation; after the setting is satisfactory, remove the WiFi connection module, and for future use (that is, the MCU that is disconnected from the connection works normally, that is, the timing function is turned on and off), just press the MCU (timing chip) connected to a start button. For the selection start with multiple functions, short press the start button one by one and observe the status of the indicator LED.

When the mobile phone or computer sets the time or timing, the HTML5 standard time control will appear, just select: month, day, hour, minute, a number in the week, or directly input the number.

The time has been started, and generally cannot be powered off, unless it is a time-delayed timing that does not require real-time time, it can be powered off before starting. Some use startup at the set time as the starting point of time, such as starting at 12:00 noon or 10:00 pm as the timing starting point, and the settings can be changed online.

For some long-term timing control, you can confirm that the timing is in normal progress in the middle. You can either use your mobile phone or computer to learn more about it online, or you can press and hold the start button to see the LED indicator flashes more than twice to indicate that (long light means it has been disconnected. electricity).

Some micro-current microcontroller control (such as capacitor step-down driving thyristor), its power supply below 5V can not drive ESP-12 WiFi module, this WiFi connection module includes 3.7V lithium battery power supply, and charging port or power plug.

In addition, the user will not immediately unplug the WiFi connection module (intentionally or unintentionally). In order to prevent power consumption or occupying WiFi resources for no reason, the ESP-12 WiFi connection module also includes a very low power consumption mode after no operation delay (deep sleep. rtctime. dsleep(0,4)), or use a mobile phone or computer to set the ESP-12WiFi module into very low power mode. It can be woken up by the RST button of the ESP-12 module or unplugged and then plugged in to continue working on the WiFi connection.

Timing settings are commonly used in the following typical formats:

[[date][time]]function1:duration1[function2:duration2][function3:duration3]…[stop duration]…

or

[date] on time 1 - off time 1 [function/parameter 1]

[Date] On Time 2 - Off Time 2 [Function/Parameter 2]

…

[] indicates that it can be defaulted, and defaults to common values; functions/parameters can include multiple values.

Example 1: [[date][time]] are all defaulted, the default is to start when power on, the default of [stop duration], the default is to not cycle:

High fire: 10 (minutes) Small fire: 30 (minutes)

Example 2:

April 1st 8:30 Alarm 10 (minutes)

Example 3:

4:00-6:30 Bath water heating

22:00-8:00 Power on the refrigerator

The typical format of the timing class is more general, so the WiFi module can be made to have a certain versatility and be shared by a variety of applications.

The ESP-12WiFi module is programmed with NODEMCU firmware, and the LUA scripting language program and HTML file are open (usually can be seen directly from the browser), which can be taught and promoted, allowing users to rewrite (scripting language, rewrite some nouns, numbers, etc.) Intuitive and convenient. Especially without a program development environment, there is a notepad, and the program explanations are all in the NODEMCU firmware) for a more suitable and beautiful setting operation interface. In particular, the SSE program example including HTML5+JS and the I2C (master) two-wire serial bus interface are triggered to start reading the bytes sent by the SCL rising edge interrupt i2c.read(0,n):byte(1,n ) program example.

In addition, the control function and usage of the programmed MCU timing chip are fully disclosed through technical documents, including the pin function and connection diagram of the MCU, and the individual functions can be programmed by themselves.

The core of the present invention is to propose the change of the application mode brought about by the temporary connection "by the WiFi module".

The original idea is to use the WiFi module to temporarily connect the microcontroller with the WiFi of the mobile phone or computer, so that the mobile phone or computer can be used to conveniently set the work requirements (because the setting of conventional electrical appliances is very troublesome, such as setting the time of the rice cooker, various electronic clocks/timers) Set time), but unexpectedly, it is this temporary borrowing of the WiFi module that brings a series of changes, especially a new application mode for the microcontroller.

The first is the use of mobile phones or computers with a high penetration rate. Everyone can do it, and specific operations can be designed with dynamic prompts. It is with the mobile phone or computer that the personalized timing settings have been made in advance, so that the work of the single-chip microcomputer or the specific startup of timing appliances is simple, that is, the display screen and keyboard on the single-chip system or timing application appliances are not required. , just set up a start button and one or two status LEDs. That is to say, the operation interface of this kind of single-chip timing control or electrical appliances is generally not needed, the volume becomes smaller, the design is simplified, and the cost is reduced.

Following this idea to further promote, under the premise of the MCU pins, more timing functions are programmed in the MCU, and the user can choose which one to use to connect with the WiFi module. Because the mobile phone or computer has dynamic operation prompts, drop-down menus, hook selections, etc., it is very convenient to select functions or personalize detailed customization. Therefore, this programmed single-chip microcomputer has become a general-purpose chip that does not require users to write programs (especially suitable for fast and low-cost to meet personalized niche needs, because personalized niche needs are not suitable for mass production of customized chips). This leads to two kinds of application users, one is the conventional end user, and the other is the secondary developer. With the familiarity with NODEMCU and the knowledge of LUA scripting language and HTML5 programming, the programmed single-chip microcomputer is used by the end user. Function customization is required, and at the same time, the supporting WiFi module operation interface is adjusted, so that the MCU timing chip and the supporting WiFi module obtained by the end user are customized and very professional application suites.

In order for the secondary developers to fully develop and apply this programmed single-chip microcomputer, the programmed single-chip microcomputer must have detailed function instructions, including the pin connection diagram and function description of the single-chip microcomputer (the output control signal also includes PWM, and the input signal also includes ADC, Provide typical test circuit), as well as NODEMCU LUA script programming and HTML5 files in the matching WiFi module (including providing HTML5+JS SSE program example and I2C (master) two-wire serial bus interface triggering start reading by SCL rising edge interrupt mode The program example of the sent byte i2c.read(0,n):byte(1,n)). End users can also rewrite according to these (scripting language, rewriting some nouns and numbers is particularly intuitive and convenient. Especially without a program development environment, a notepad is enough, and the program explanations are all in the NODEMCU firmware) more suitable for their own setting operation interface.

Note: STC microcontroller usually needs to perform high-speed operations, such as outputting the 110KHz PWM drive signal required for micro-atomized ultrasonic waves, or learning the code emitted by the infrared remote control, and also has a system clock and responds to key operations including short press, Long press, generally can only use efficient assembly language (especially the 8-pin IC of STC15 series, the on-chip resources are limited, the program must be very efficient and streamlined), and the programming is difficult, so the program of STC microcontroller is generally not used for teaching promotion.

Applicable application classes:

1. Timer control class, the timer setting is actually divided into two parts: clock setting and timing setting. It is very troublesome to set these two settings with a conventional clock module with a display screen. It is necessary to press the small button again and again, and it is inevitable to make a mistake and have to do it all over again. The ideal method is of course to use a mobile phone or computer to do this kind of setting, it has (HTML5) time control, just choose and click, or the keyboard directly input numbers or handwriting is very convenient. Whether it is the clock setting or the timing setting, after the setting is completed, there is no need for a mobile phone or a computer. The single-chip microcomputer does not need a display screen and a keyboard when working, only a start button and one or two status indication LEDs are left. Control includes power-on and power-off, PWM value adjustment, infrared remote control, wireless remote control, and microporous atomization ultrasonic output. Application examples include refrigerator peak and valley power supply energy-saving sockets, ultrasonic micro-atomization, learning-type timing remote control, etc.

2. Numerical adjustment type settings: selection of the working frequency of the microporous atomizer, setting of the brightness of the LED lamp (reducing the brightness is very energy-saving, especially for high-voltage constant current power supply with more than 36 LED lamp beads, which has become the mainstream at present, the problem is that as long as the One LED lamp bead is damaged, and it is the best protection to reduce the brightness), battery car charger work fine-tuning (lowering the charging current is safe, but the time is long; for cheap assembled batteries without battery protection circuits, increase the high-current charging time limit Settings), rice cookers, stew pots, health stoves, induction cookers, electric pottery stoves, etc. (micro-control appliances) set up several special projects according to personal needs (eg: cooking: high fire for 10 minutes, low fire for 20 minutes, no heat preservation; hot dishes: High fire for 1 minute, low fire for 3 minutes, keep warm; safe heating for the elderly: low fire for 20 minutes, no heat preservation), these trivial settings can only be explained clearly by using a mobile phone or computer. Once the setting is completed, it is very convenient to use in normal use, no need for a mobile phone or a computer, just a start button and several status indicator LEDs (for example, LED1 light means: high fire for 10 minutes, LED2 light means: low fire for 20 minutes, LED3 light means: keep warm for 60 minutes; short press the start button to rotate, long press to cancel or close).

Note that the above two types of setting adjustments may include more complex human-computer interaction, such as the selection of the working frequency of the micro-atomized atomizer. If it is correct, the working current is not very large, and the atomization is very strong. If the working frequency is not selected correctly, the atomization is small and the current is large, which may burn the driving power tube. Therefore, let the user fine-tune the working frequency, observe the effect in real time, and choose the most Excellent fixed (usually do not need this process).

Another example is the charging of an electric vehicle battery. If you want to check whether the battery is about to break down, you usually observe the voltage rise during charging. If the voltage rises quickly and the voltage is too high, then the battery has a problem. Or a computer, let them perform complex operations and display the results. And these are rare to do once (plug in the matching WiFi module and connect to the mobile phone or computer to operate). Usually, the WiFi module is not needed for work, just a start button and several status indicator LEDs.

The applications listed above are very economical and simple to implement by programmed single-chip microcomputers, many of which are for the timing control of the single-chip microcomputer, eliminating the need for a display keyboard (some even do not even need a start button and LED status indication, such as LED dimming lighting, which is successive power-off switching). When it is rare to need complex adjustment settings, borrow the matching WiFi module to temporarily do it on your mobile phone or computer. And the matching WiFi module can be shared with one, and all the supporting NODEMCU LUA programs are compiled together and loaded into the ESP-12 WiFi module, and the required application can be selected by the mobile phone or computer when using.

Therefore, this has contributed to a single-chip timing control chip proposed in this paper.

Mobile phone or computer connection does not involve third-party network services, not to mention registration/password, no download and installation of APP, and no need to connect to an external network. So don't confuse it with the current high-profile Internet of Things. Of course, if you need to connect to the Internet, there is an MQTT module in the NODEMCU of the ESP-12, which already has the Internet of Things function.

Claims (4)

1. a kind of single chip timing chip borrowing WiFi module, it is characterized in that, described single chip timing chip first passes through matching WiFi connection module before use, is carried out timing control function setting to it with the aid of mobile phone or computer; The single-chip timing chip is a timing control chip programmed by a single-chip computer, and has an I2C two-wire serial bus interface, which is used to connect the matching WiFi connection module, and realize the timing function setting, timing check confirmation, call-out view or modify reset; The matching WiFi connection module is an ESP-12 WiFi module, which is programmed to define a two-wire serial bus interface with I2C, which is used to connect the I2C interface of the single chip timing chip; The data in the single-chip microcomputer is actively transmitted to the mobile phone or computer using the SCL upper edge interrupt notification ESP-12 WiFi module and the SSE server push technology of HTML5+JS; At different times, a WiFi connection module can be connected with a plurality of the single-chip timing chips, and only connect it when the set timing function needs to be changed or the timing check is confirmed. Usually, the single-chip timing chip does not need the WiFi connection module when working; When the single chip timing chip works independently of the WiFi connection module, only one start button and one or more working status indication LEDs are required; the start button operation includes short press, long press, or successive short presses in combination with the working status indication LEDs, so as to realize multiple functions. The function is selected to start; the IO ports of the MCU timing chip are respectively connected with the start button and the working status indicator LED; The single-chip timing chip has a flash EEPROM of more than 1K, which is used to save the set start-stop time, cycle period, starting point time, and remote control infrared code record, which will not be lost when power off; Mobile phone or computer, the time on it will be synchronized to the MCU timing chip, or start at the set time as the starting point of time, more applications do not need a real-time clock, as long as the delay after startup; The ESP-12 WiFi module is programmed with NODEMCU firmware and LUA scripting language. It is open source and published. It provides SSE program examples including HTML5+JS and the I2C two-wire serial bus interface triggers the program to read the bytes sent by the SCL rising edge interrupt. Example, in order to allow users to rewrite a more suitable operation interface with a scripting language; Mobile phone or computer WiFi connection ESP-12 WiFi module adopts WiFi direct connection mode, ESP-12 WiFi module includes HTTP service, mobile phone or computer does not need to download and install APP, as long as the browser accesses 196.168.4.1 or 196.168.x.x, of which 196.168. x.x is defaulted or designated by the wireless router DHCP; it does not involve third-party network services, nor does it need to be connected to an external network; The method of connecting a mobile phone or computer to the ESP-12 WiFi module via WiFi is as follows: Before starting the work of the MCU timing chip, first use the mobile phone or computer to set the time or timing function, so it is necessary to connect the matching WiFi connection module; if it is the first time to connect, the mobile phone or computer will find the ESP-12 WiFi module in the wireless network settings, no Password or 12345678, connect to WIFI. After the connection is successful, open the browser to access 196.168.4.1. After entering the operation interface, you can set the time or timing function; then, put the local wireless router WIFI connection name and password into the matching WiFi In the connection module, each time it is connected to the matching WiFi connection module, it will automatically connect to the local WIFI; after the setting is successful, write down the IP address used, and then the mobile phone or computer does not need to enter the wireless network settings to find the ESP-12 WiFi module connection. , still connect to the original local WIFI, when the mobile phone or computer needs to be set online again, just use the browser to access and write down the IP address 196.168.x.x used; When the mobile phone or computer enters the setting interface, there will be dynamic operation prompts, including direct test effect or setting confirmation; after the setting is satisfactory, remove the WiFi connection module, and the start and stop work in future use only needs to press the start button connected to the microcontroller and observe the LED working status. instructions; When the mobile phone or computer sets the time or timing, the HTML5 standard time control will appear, just select: month, day, hour, minute, a number in the week, or directly input the number. 2. a kind of single chip timing chip borrowing WiFi module according to claim 1, it is characterized in that, the I2C two-wire serial bus interface of described matching WiFi connection module comprises the plug-in component that is designed with four-core socket, It also stipulates that the arrangement of the four-core sockets is: +, SCL, SDA, -; in addition, it also includes the USB connection interface for connecting to the computer for programming the ESP-12 WiFi module through the RS serial port of the ESP-12 WiFi module; For micro-current microcontroller control, the power supply below 5V cannot drive the ESP-12 WiFi module. This WiFi connection module includes a 3.7V lithium battery power supply, and a charging port or power plug; Considering that the user will not unplug the WiFi connection module immediately, the WiFi connection module also includes no operation delay to enter the extremely low power consumption mode, or use a mobile phone or computer to set the ESP-12 WiFi module in the WiFi connection module to enter the extremely low power consumption mode , wake up via the RST button on the ESP-12 WiFi module or unplug it and plug it back in. 3. a kind of single-chip timing chip borrowing WiFi module according to claim 1, is characterized in that, described single-chip adopts STC15 series single-chip microcomputer, including 8-pin package, wherein two feet P3.3, P3.4 are used as I2C Slave communication ESP-12 WiFi connection module, P3.0 and P3.1 are reserved for connecting to the computer during programming. Usually, P3.0 is used as the start button on the timer, and P3.1 is used for the work on the timer. Status indication LED, P3.2, P3.5 control output, or P3.2 infrared code sending learning record. 4. a kind of single chip timing chip borrowing WiFi module according to claim 1, it is characterized in that, if described single chip timing chip is used as timing ultrasonic microporous atomization humidification device, the drive of relevant ultrasonic microporous atomization sheet , humidity detection, and driving of low-voltage DC fans, the connection method realized by STC15W104 type 8-pin single-chip microcomputer is as follows: the single-chip microcomputer outputs 110KHz PWM rectangular wave port P3.1 series current limiting resistor R1 is connected to MOS tube Mos1 gate G, MOS tube The source S of Mos1 is grounded, the drain D of the MOS transistor Mos1 is connected to the primary end of the high-frequency step-up transformer B, the other end of the B primary is connected to +12V, and the secondary ends of the high-frequency step-up transformer B are connected in parallel with the two ends of the ultrasonic microporous atomizer W; Humidity detection adopts DHT11 bus interface digital humidity sensor, the single-chip microcomputer port P3.2 is connected to the only data line of DHT11, the other two pins of DHT11 are grounded, and the other is connected to the power supply + terminal of the single-chip microcomputer; MCU output port P3.0 series current limiting resistor R2 is connected to the gate G of the MOS tube Mos2, the source S of the MOS tube Mos2 is grounded, the drain D of the MOS tube Mos2 is connected to the negative electrode of the DC fan F, and the positive electrode of the DC fan F is connected to +12V; If the MCU timing chip is used as a timing infrared remote control and a learning-type coding record, the connection method realized by the STC15W104 type 8-pin MCU is as follows: the output port of the MCU P3.5 series current limiting resistor is connected to the negative end of the infrared emission LED, and the positive end of the infrared emission LED Connect to the power supply + terminal of the single-chip microcomputer; the output terminal of the infrared receiver is connected to the port P3.2 of the single-chip microcomputer, and the other two pins of the infrared receiving head are grounded, and the other is connected to the power supply + terminal of the single-chip microcomputer.

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