@jmpratt Since there is no configuration data on a WiPy that could get lost, you could try to make a complete erase using esptool.py and then reload the firmware.

Hi, I just tested a FiPy running the latest firmware with the following code: import pycom import time pycom.heartbeat(False) for blink in range(5): pycom.rgbled(0xff0000) time.sleep(0.25) pycom.rgbled(0x000000) time.sleep(0.25) And it successfully blinks the on-board LED red. Have you tried to update your FiPy to the latest firmware?

@DvdGiessen That's brilliant, thanks for bringing this to our attention! Would you mind opening an issue on the GitHub repo for this particular bug? https://github.com/pycom/pycom-micropython-sigfox/issues Thanks!