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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.
@Jean-Philippe_Rey
OK the problem was the device flashing process, not the BLE adapter itself. For a reason, the
J-Flash Litetool did not flash the NRF52 the first time.After some tests, both my CSR and Broadcom based BLE dongles are working fine :-)