ESA2GJK1DH1K Basics: Test Air202 above two-dimensional code scanning APP binding by MQTT control device (compatible with SIM800) Hardware Description

Foreword

First, the basics of the program requires: https://www.cnblogs.com/yangfengwu/category/1566194.html all source code open source, your own learning

Second, this program is compatible with SIM800

If you want to bind SIM800, please send its IMEI number to generate two-dimensional code, using a mobile phone APP scan.

Realize the function summary

　　GPRS module released by theme: device / GPRS module device IMEI number subscribed threads: user / device IMEI number

　　APP obtain IMEI number GPRS device by scanning the two-dimensional code, and then set the subscription topics: device / device IMEI number issued by theme: user / device IMEI number

　　Note: In fact, on one and the only difference is the code control server GPRS TCP connection, and then pass through other programs achieve exactly the same.!

　　There are a further two behind, I will tell you how to port my current MQTT handler to their own projects, as long as they can achieve the module TCP, they will be able to achieve MQTT

　　MQTT itself because it is a TCP server. You follow him to the provision of data sent, it will help you to forward the data only.

　　I had a packet is to everyone no matter what modules, can be transplanted every minute on MQTT!

　　Give a man to fish, you should give a great value to fish!

　　To tell the truth Ha, I use this program on my bag transplant, only took less than 10 minutes. If there is in fact how ready steady flow of know TCP connection control module, and also five minutes.

First, the hardware program

　　1.1: STM32 AT command to the control module GPRS TCP server MQTT transparent transmission connection, the communication control MQTT achieved.

　　　　1.1.1: MQTT treatment, using the official language C + I MQTT pack secondary package (to facilitate rapid migration use).

　　　　1.1.2: GPRS connection control part of the program server MQTT