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ESP8266-01, Blue LED on Steady after successful test.

PostPosted: Tue Jan 09, 2018 10:21 am
by Stewart
I'm testing my first ESP8266 WiFi module (with ESP-01 Adapter, with 3.3V, & level conversion)

My question is, after setting the baud rate last night, testing, and getting a good AT+GMR response, it now powers on to a steady Blue LED with no response to AT commands. Only an echo '>>>> AT' of the command sent.

This condition occurs when powered by outboard 5V power supply or Arduino. The adapter board has only 4 pins, TX, RX, Gnd, VCC.

I have not Flashed the ESP8266, and didn't want to.

What could cause this solid Blue suddenly?

Any guidance appreciated.