CN204733169U - A kind of portable serial port communication test instrument - Google Patents

Abstract

The utility model discloses a portable serial port communication tester. The MAX3232 chip converts the received RS232 serial port signal into a TTL level, and the TTL level is output to the RXD and TXD pins of the STC12C5A60S2 single-chip microcomputer through pins 13 and 14 of the MX3232 chip. , TC12C5A60S2 MCU outputs asdii codes to 1602 display at P0 and P2 ports, and at the same time, TC12C5A60S2 MCU outputs TTL level to wifi module at RXD2 and TXD2 pins of P1 port, and wifi module converts TTL level into TCP/IP protocol and transmits it to Mobile APP. The utility model integrates commonly used functions such as data sending and receiving, liquid crystal display, and loopback testing, and has the characteristics of convenient use, reliable testing, and flexible operation.

Description

A Portable Serial Communication Tester

technical field

The utility model relates to a serial port testing instrument.

Background technique

When there is a problem with the serial port communication, and other reasons are excluded, the operation and maintenance personnel need to carry a notebook computer equipped with special test software to the site for transmission testing, in order to complete the work of sending messages in the observation channel, and the operation and use of the notebook computer is very important to the site. The condition requirements are relatively high, and it is inconvenient to quickly locate faults. Therefore, there is a need for a device with low requirements on the operating status, high integration, small size and easy to carry to meet the daily operation and maintenance needs of the serial port by the operation and maintenance personnel.

Contents of the invention

In order to achieve the above purpose, the utility model provides a portable serial communication tester, the technical solution adopted by it is: including the APP end of the mobile phone, the 1602 display screen arranged on the casing, and the PCB circuit board respectively arranged in the casing The RS232 serial port, MAX3232 chip, STC12C5A60S2 single-chip microcomputer and wifi module on the board are characterized in that: RS232 serial port, MAX3232 chip, STC12C5A60S2 single-chip microcomputer and wifi module are connected in turn, the STC12C5A60S2 single-chip microcomputer is connected to the 1602 display screen, and the wifi module is wirelessly connected to the mobile APP terminal; the MAX3232 chip will The received RS232 serial port signal is converted into TTL level, and the TTL level is output to the RXD and TXD pins of the STC12C5A60S2 microcontroller through the 13 and 14 pins of the MX3232 chip, and the TC12C5A60S2 microcontroller outputs the asdii code to the 1602 display at the P0 and P2 ports, At the same time, the TC12C5A60S2 single-chip microcomputer outputs TTL level to the wifi module on the RXD2 and TXD2 pins of the P1 port, and the wifi module converts the TTL level into TCP/IP protocol and transmits it to the APP terminal of the mobile phone.

The utility model integrates common functions such as data sending and receiving, liquid crystal display, and loopback test, and adopts a single-chip microcomputer plus a MAX3232 serial port communication chip, a wifi chip, and a 1602 LCD screen to realize serial port data receiving, sending, storing, and two-way loopback operations. The control of TTL level is completed through the remote control of the mobile phone APP, and converted into RS232 signal through the translation chip MAX3232, so as to realize the daily maintenance operation of the RS232 serial port. The utility model has the characteristics of convenient use, reliable test and flexible operation.

Description of drawings

Fig. 1 is the circuit diagram of the utility model;

Fig. 2 is the circuit diagram of STC12C5A60S2 single-chip microcomputer in the utility model;

The circuit diagram of MAX3232 chip in Fig. 3 utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, Figure 2 and Figure 3, the 1602 display screen is set on the shell, and the RS232 serial port, MAX3232 chip, STC12C5A60S2 single-chip microcomputer and wifi module connected in sequence are respectively set on the PCB circuit board in the shell, and the STC12C5A60S2 single-chip microcomputer is connected to the 1602 display screen, and the wifi module connects to the APP terminal of the mobile phone wirelessly. The MAX3232 chip converts the received RS232 serial port signal into a TTL level, and the TTL level is output to the RXD and TXD pins of the STC12C5A60S2 microcontroller through the 13 and 14 pins of the MX3232 chip, and the TC12C5A60S2 microcontroller outputs the asdii code to 1602 at the P0 and P2 ports At the same time, the TC12C5A60S2 single-chip microcomputer outputs the TTL level to the wifi module on the RXD2 and TXD2 pins of the P1 port, and the wifi module converts the TTL level into a TCP/IP protocol and transmits it to the mobile phone APP. STC12C5A60S2 single-chip microcomputer and 1602 screen provide 5V voltage power supply to the tester after 4 18650 batteries are boosted by dc-dc, and are connected through the VCC interface.

Remotely control the STC12C5A60S2 microcontroller to send and receive numbers in a specific format through the mobile phone APP, and display them on the mobile phone screen and 1602 screen respectively. In addition, the baud rate, stop bit, and parity bit can be adjusted in the APP, which can complete a series of common serial port operations such as two-way loopback operation, data storage and playback.

Claims (1)

1. A portable serial port communication tester, comprising a mobile phone APP end, a 1602 display screen arranged on the casing, and an RS232 serial port, a MAX3232 chip, a STC12C5A60S2 single-chip microcomputer and a wifi module respectively arranged on a PCB circuit board in the casing, its characteristics It is: RS232 serial port, MAX3232 chip, STC12C5A60S2 single-chip microcomputer and wifi module are connected in sequence, STC12C5A60S2 single-chip microcomputer is connected to 1602 display screen, wifi module is wirelessly connected to mobile phone APP terminal; MAX3232 chip converts the received RS232 serial port signal into TTL level, and the TTL level passes through The 13 and 14 pins of the MX3232 chip output to the RXD and TXD pins of the STC12C5A60S2 single-chip microcomputer, and the TC12C5A60S2 single-chip microcomputer outputs the asdii code to the 1602 display screen at the P0 and P2 ports, and at the same time, the TC12C5A60S2 single-chip microcomputer outputs the TTL level at the RXD2 and TXD2 pins of the P1 port To the wifi module, the wifi module converts the TTL level into a TCP/IP protocol and transmits it to the mobile phone APP.