# GPRS Particle Moniotr DIY Tutorial3 GPRS Particle Monitor Label: DIY Gas Monitor --- The code is based on the luat platform provided by Shanghai AirM2M communication technology CO. Ltd. and is fully open on github. [https://github.com/lewei50/luat-AirMonitor][1] The effect of wire connection on the bread board is shown in the following picture (welcome to do the bottom board by yourself). ![全家福][2] # Wire Connection AirM2M S1 development board is used as master. S1 development board | peripheral | Description | ----|------|-----| VBUS | A4 G5 Power Supply | HMI Display power supply UART1 RXD | A4 G5 TXD | IIC | si7021 iic | VDDIO | si7021 vdd | UART TXD | HMI Display RX | # Features 1. GPRS uplink, supported by DeviceBit and WeChat client 2. Support LCD screen, and can also be used without SIM card There is a two-dimensional code that can be directly scanned by WeChat for binding. **(Note: In order to generate the two-dimensional code, you should send IMEI to service##lewei50.com and indicates individual particle activity. It is free for Individual DIY Sn.)** ![微信扫描二维码][3] ![微信扫描以后可以给检测仪改名字][4] ![然后检测仪的名字就改了][5] # Costs Hardware | Costs | Description ----|----------|-----| AirM2MS1(GPRS Luat version) |About 50 RMB|GPRS Uplink, Cooperate with luat development environment YEETC A4 or Plantower G5| About 75 RMB | Particle Sensor HMI lcd serial port screen |35 RMB | SI7021 Module|10 RMB| Annual fee for IoT service|22 RMB| Board&Wires|5 RMB| [1]: https://github.com/lewei50/luat-AirMonitor [2]: http://doc-resources.lewei50.com/lewei50/img/ug25-lewei50-20170726-1.jpg [3]: http://doc-resources.lewei50.com/lewei50/img/ug25-lewei50-20170726-2.jpg [4]: http://doc-resources.lewei50.com/lewei50/img/ug25-lewei50-20170726-4.jpg [5]: http://doc-resources.lewei50.com/lewei50/img/ug25-lewei50-20170726-3.jpg