# GSM 2G gateway

# Compatible parts

Module Purpose Where to Buy
A6 GSM GPRS module compatible parts list
A7 GSM GPRS module with GPS compatible parts list

# Hardware setup

Module Pin NodeMCU / ESP8266 Pin
H_RXD D6
H_TXD D7
GND GND
VCC5 MOSFET driven by D5

For VCC5 you can power it directly all the time with an USB cable or use a MOSFET like here

Don't use the nodemcu/wemos 5V pin for the A6/7 power, use a dedicated power supply for both or dedicated to the A6/7 with at least 2 amps ability.

So as to start your A6/7 module press the red button for 4 seconds, or link the PWR_KEY pin to VCC5.0 for the same time.

Addon_2G