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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.
@GeekBot
Thank you Gordon,
We are sure that there is ground problem or tx/rx confusion. I work with another person and we double check the wiring. We receive the reset message from the module at power on, so it means that at least basic serial parameters look OK.
The snippet you provide above produces nothing back. It seems that the RN module doesn't catch the \r\n. Looking on the line with the Foca converter tx input, we see the string with CR/LF is emitted by Espruino. So it seems clear that the module doesn't interpret the command. What is strange is that the same command issued by the Foca adpator is executed by the module. So the Foca adaptor and Espruino don't behave exactly the same, and can't manage to undestand where they are different.
One way if to check the electrical signals on the line to see if we are exactly at the good speed or if the Espruino or module clocks and serial speed are shifted. But I need a memory oscilloscope for that, and I don't have yet...
Any idea is welcome, we are totally stuck on this issue.
Best regards
GeekBot