About two weeks ago the SCK stopped transmitting data. At first it thought of power loss due to insufficient sun light. But USB connections didn’t help and always one blue LED was constantly on; no blinking blue.
Then I discovered SCK_check and loaded it via Arduino IDE. The results are varying. Sometimes I get on the serial monitor:
Trying to connect.
Firmware version: 0
Error reading version.
Wifi device is corrupted 
Want to test the EEPROM? (y/n)
And sometimes:
Trying to connect.
Reseting…
Please, turn off the board.
What does that mean? Hardware dead? Reanimation possible? Extra Info: It is an SCK v1.1, Firmware 0.9.0
Regards …Frank