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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.
@Gordon
Are the modules next to each other, or quite far apart?
It looks like one of the modules is able to send data, but it doesn't get an acknowledgement back - so it just keeps sending the same packet over and over.
I think that's something in the NRF module itself. About all we could do to protect against that is to tag each packet with an incrementing counter, and to then throw away duplicate packets.