ESP8266 Community Forum

Hello folks,

I'm following the tutorial at https://github.com/esp8266/esp8266-wiki/wiki. I don't see any warnings/errors in the "Toolchain", "Building" and "Uploading" steps and I do see the blue LED on my ESP8266 blink when the esptool is flashing the new firmware on the ESP8266. However, after the esptool reports a successful flash, I don't see the LED blink every second; in fact, it doesn't blink at all.

I've also tried simplifying the code such that the LED just stays on forever but the LED remains off after the firmware upload is complete. Any ideas on how to debug this? Or any ideas on what I might have missed? Or does the blinky example not work on certain ESP8266 modules?

I'm going to reflash the chip with the AT demo next to see if the problem lies with the firmware update or if it just lies with the blinky code. The initial AT demo worked fine, it was able to connect to the wifi network.

Well, I tried reflashing the firmware to the original AT demo but there are no responses from the AT commands. I guess I'll try re-installing the toolchain next.

I've tried setting the baud rate to 9600/57600/115200 and in all cases, the firmware upgrade completes fine but blinky/AT Demo do not seem to work.

PS: Is there any way to edit posts in this forum?

So, this is embarrassing.

I had assumed that GPIO2 was connected to the blue LED until I decided to take out my multimeter....