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GSM GPRS 2G gateway
ESP8266 - GSM/GPRS SMS Send and Receive
Note: Gateways can be used separately. Follow this Link for a quick overview about all Modules and possible Combinations.
Tested Modules for the 2G Gateway:
|Module||Purpose||Where to Buy|
|A6||GSM GPRS module||-|
|A7||GSM GPRS module with GPS||parts list|
|Module Pin||NodeMCU / ESP8266 Pin|
|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.
For the libraries take the version of A6lib linked into Lib folder
If you want to use this gateway uncomment in user_config
For your first tests comment the others Zgateway.