I want to use two ESP8266 (NodeMCU) with one GSM module (SIM800I).
Both the NodeMCU does different type of activity and and using the SMS I want to read data from both the NodeMCU.
Right now, I am able to do that with single NodeMCU and SIM800I.
How can I send the serial coming in from SIM800I to both the NodeMCU at a time? I read about serialpassthrough, but I have a doubt that it just passes the serial data but will not read it in the same NodeMCU. Am I correct?
Thanks in Advance.