ESP8266 Community Forum

- Tue May 30, 2017 9:10 pm #66548 I have a nodemcu esp8266 e12. The board was working fine and suddenly it stopped working. It has a solid blue led now and the Wifi module led does not light up anymore. My computer detects the board when connected, but I can't upload or flash it. I get this error when I upload the blink led code:warning:
espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed
Someone pls Help

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- Wed May 31, 2017 8:26 am #66567 After power on or at manual reset (with the RST-button on the board), the blue LED on the ESP itself should at least blink a few times.
Does yours?
You'd better temporary remove the NodeMCU from the breadboard, to rule that out.

I don't know where the blue LED on your board is for (I don't have one).

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.

- Thu Jun 01, 2017 9:36 am #66610

After power on or at manual reset (with the RST-button on the board), the blue LED on the ESP itself should at least blink a few times.
Does yours?
You'd better temporary remove the NodeMCU from the breadboard, to rule that out.

I don't know where the blue LED on your board is for (I don't have one).

the led turns off when i press the onboard reset button,but it comes back on as soon as I let go of the button

- Thu Jun 01, 2017 9:58 am #66611 Please tell me what happens with the blue LED on the ESP (the one encircled in red, near the antenna), not the blue LED on the NodeMCU-board.

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.