ESP8266 Community Forum

Hi ,
I am looking for some code to connect SIM800 ( or similar ) GSM module to ESP8266 as alternative
WWW connection in case WiFI not present . There is lost of Arduino based code for this purpose but I am running Espressif SDK on ESP . I have implemented softuart code for creating serial Uart connection to SIM800
and carried over some Arduino drivers for SIM800 . But I am looking for native SDK source code for AT command communication with these GSM modules ( SIM800 or similar ) .
Thanks for info .

sim800 is not difficult to use.
you just need to send AT commands over serial.
required AT commands is completely documented in simcom's tcpip application note.

Hi ,
Yes I agree AT commands are pretty much lineup in docs . I am more looking for source code which fits more ESP SDK then Arduino . For example "sendCommand" from Arduino cpp source code is not really suitable for
SDK multitasking environment ( Watch dog gets reset due to long timeouts etc. )
.