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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@user7143
Fona also requires 2 second high pulse to turn on/off board. I have might not explained correctly but when I run Gordon's code the digitalPulse command does not seem to block. Hence the other AT commands to initialize the board are sent before the GSM board is powered on.
Thinking about his maybe the Send_Command in the start_GSM function needs to be fired from a SetTimeout command that waits for 2 seconds to allow for the GSM board to be powered on. That way the commands are sent and read rather than being lost.
I think most GSM boards are going to have the same command set so once the code is working it will be relevant to a number of GSM boards.