CN209962156U

CN209962156U - Clock circuit based on ESP32 chip

Info

Publication number: CN209962156U
Application number: CN201920886400.5U
Authority: CN
Inventors: 黄保伟; 马龙
Original assignee: Chengdu Yi Lian Zhi Tong Information Technology Co Ltd
Current assignee: Chengdu Yi Lian Zhi Tong Information Technology Co Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-01-17
Anticipated expiration: 2029-06-13

Abstract

The utility model provides a clock circuit based on ESP32 chip, including power management unit, ESP32 chip, external clock chip, crystal oscillator, rechargeable battery; the ESP32 chip and the rechargeable battery are electrically connected with the power management unit respectively; the ESP32 chip is electrically connected with the external clock chip through an I2C interface; the crystal oscillator and the rechargeable battery are electrically connected with the external clock chip respectively. The rechargeable battery further comprises an inverting diode, wherein the anode of the inverting diode is connected with a 3.3v power supply, and the cathode of the inverting diode is respectively connected with one end of the rechargeable battery and one end of the external clock chip. The utility model discloses a clock circuit based on ESP32 chip, the beneficial effect that has is that clock circuit low power dissipation, hardware are with low costs, reduced photovoltaic control data and lost the error rate.

Description

Clock circuit based on ESP32 chip

Technical Field

The utility model relates to a photovoltaic control field especially relates to a clock circuit based on ESP32 chip.

Background

The ESP32 chip is a high-performance embedded Wi-Fi chip developed by Lexin corporation, and is widely applied in practice due to the characteristics of code development, rich development data and the like. Compared with the scheme of a Lexin chip, the photovoltaic inverter and the Wi-Fi collector have the advantages that a large-capacity battery needs to be used, power consumption of a clock circuit is high, and hardware cost is correspondingly increased.

From the perspective of product design, how to design a typical clock circuit for an ESP32Wi-Fi chip solves the technical disadvantages of the existing scheme of the ESP32 chip, and at the same time, does not increase the hardware and software development costs too much, which becomes a problem to be solved urgently in the industry.

Disclosure of Invention

In view of the above shortcomings in the prior art, an object of the present invention is to provide a clock circuit based on an ESP32 chip, which is used to solve the problem of high power consumption of the clock circuit, high hardware cost, and easy loss and error of the photovoltaic monitoring data in the prior art.

In order to solve the technical problem, the utility model discloses a realize according to following mode: an ESP32 chip-based clock circuit comprises a power management unit, an ESP32 chip, an external clock chip, a crystal oscillator and a rechargeable battery; the ESP32 chip and the rechargeable battery are electrically connected with the power management unit respectively; the ESP32 chip is electrically connected with the external clock chip through an I2C interface; the crystal oscillator and the rechargeable battery are electrically connected with the external clock chip respectively.

And the positive pole of the reverse phase diode is connected with a 3.3v power supply, and the negative pole of the reverse phase diode is respectively connected with one end of the rechargeable battery and one end of the external clock chip.

Further, the rechargeable battery is a lithium battery.

Further, the crystal oscillator frequency is 32.768 KHz.

Further, the signal of the ESP32 chip is ESP 32-SOLO-1.

Further, the external clock chip model is BM8563 ESA.

As mentioned above, the utility model discloses a clock circuit based on ESP32 chip has the beneficial effect that clock circuit low power dissipation, hardware are with low costs, reduced photovoltaic control data and lost the error rate.

Drawings

Fig. 1 is a block diagram of a hardware circuit structure of a clock circuit based on an ESP32 chip according to an embodiment of the present invention.

Fig. 2 is a schematic hardware circuit diagram of a clock circuit based on an ESP32 chip according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

As shown in fig. 1-2, the utility model provides a clock circuit based on ESP32 chip, including power management unit, ESP32 chip U1, external clock chip U2, crystal oscillator Y1, rechargeable battery BAT.

The ESP32 chip U1 is used for the core of the whole Wi-Fi collector and is responsible for collecting data of the photovoltaic inverter, uploading the data to a cloud platform and simultaneously communicating with an external clock circuit and reading and setting time. The external clock chip U2 is responsible for saving and calculating the current time. The crystal oscillator Y1 is used to ensure the time accuracy and stability of the external clock chip U2.

The ESP32 chip U1 and the rechargeable battery BAT are electrically connected with the power supply management unit respectively, and the power supply management unit is used for managing the distribution of a 5-12V external power supply and the rechargeable battery BAT; the ESP32 chip U1 is electrically connected with an external clock chip U2 through an I2C interface; the crystal oscillator Y1 and the rechargeable battery BAT are electrically connected to the external clock chip U2, respectively. The rechargeable battery pack further comprises an inverting diode D1, wherein the anode of the inverting diode D1 is connected to a 3.3v power supply, and the cathode of the inverting diode D1 is respectively connected to one end of the rechargeable battery BAT and one end of the external clock chip U2.

The model of an ESP32 chip U1 is ESP32-SOLO-1, the model of an external clock chip U2 is BM8563ESA, the frequency selected by a crystal oscillator Y1 is 32.768KHz, and a rechargeable battery BAT is a lithium battery.

When the 5-12V power supply is switched on, the ESP32 chip U1 starts working, wherein the solidified program starts to start and initializes the I2C communication bus, and communicates with the external clock chip U2 through the SDA bidirectional data line and the SCL clock line, and reads the time information currently stored by the external clock chip U2. While the 3.3V power supply is energized, the power supply is also linked to the lithium battery BAT via the inverting diode D1. When the 3.3V power supply is powered off, the ESP32 chip U1 stops working due to power supply disconnection, and the lithium battery BAT supplies power to the external clock chip U2, so that the external clock chip U2 can work under the condition that the external power supply is disconnected. The corresponding external clock chip U2 has low power consumption, the current is about 5nA, and a 30mAH lithium battery BAT can be used for 10 days, so that the problem that the local Wi-Fi acquisition rod acquires time when a client machine is shut down in a short period or a home Wi-Fi is disconnected and networking time synchronization cannot be performed in a short period is completely solved. Therefore, the time stamp of the monitoring data is correct in the actual application scene, and the monitoring data is not lost and the data correctness in the photovoltaic monitoring industry in a short period is also guaranteed. Meanwhile, due to the existence of the reverse diode D1 between the 3.3V power supply and the lithium battery BAT, the power supply of the lithium battery BAT cannot flow into the 3.3V power supply in a reverse phase mode. The external clock chip U2 can support operation regardless of the presence of a powered-on 3.3V power supply. And because lithium cell BAT only provides the power for external clock chip U2, thereby guaranteed the low-power consumption of clock circuit.

To sum up, the utility model relates to a clock circuit based on ESP32 chip, the beneficial effect that has is that clock circuit low power dissipation, hardware are with low costs, reduced photovoltaic control data and lost the error rate. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The clock circuit based on the ESP32 chip is characterized by comprising a power supply management unit, an ESP32 chip, an external clock chip, a crystal oscillator and a rechargeable battery; the ESP32 chip and the rechargeable battery are electrically connected with the power management unit respectively; the ESP32 chip is electrically connected with the external clock chip through an I2C interface; the crystal oscillator and the rechargeable battery are electrically connected with the external clock chip respectively.

2. The ESP32 chip-based clock circuit according to claim 1, further comprising an inverting diode, wherein the anode of the inverting diode is connected to a 3.3v power supply, and the cathode of the inverting diode is connected to one end of the rechargeable battery and one end of the external clock chip, respectively.

3. The ESP32 chip-based clock circuit according to claim 1, wherein the rechargeable battery is a lithium battery.

4. The ESP32 chip-based clock circuit of claim 1, wherein the crystal oscillator frequency is 32.768 KHz.

5. The clock circuit based on the ESP32 chip as claimed in claim 1, wherein the signal of the ESP32 chip is ESP 32-SOLO-1.

6. The ESP32 chip-based clock circuit of claim 1, wherein the external clock chip is of type BM8563 ESA.