Hi there,
We have a SCK2.1 that has been running well for 5 years, but dropped out back in April 2025:
https://api.smartcitizen.me/ui/devices/13114#
When we looked at it, it had a solid blue light, so we did a soft reset (power cycle). It then had a breathing blue light, but still not posting data.
Finally got round to looking at it - I have tried a soft reset, updating the firmware (to SAM_firmware_sck2.uf2) and a factory reset. I occasionally in that process was able to connect to the local access point, but generally it would not appear.
I then connected via serial monitor in Arduino IDE, and saw that the board was repeatedly saying:
Restarting ESP...
ESP off...
ESP on...
So then the next time it happened to get the ESP to start, I tried updating the ESP firmware via the Local Access Point page.
This has not worked - the board is still repeatedly turning the ESP off and on again, and has not yet been able to get the ESP to start at all.
Do we have a faulty ESP? If so, should I simply solder on a replacement?