ESP8622 with NodeMCU firmware starts blinking after flashing new version of firmware (old builds are working)

Question

Yesterday i tried to generate new firmware bin from nodemcu-build.com and after flashing with esptool.py, my esp started blinking (blue diode on esp chip) and sending out (t

Answer 1

I faced the same issue. I did the following steps, which solved the problem. Before flashing a new firmware, make sure your chip is fully erased. You may use the command below where "serial-port-of-ESP8266" may vary:

esptool.py --port  erase_flash

Then flash the firmware to the chip using the same technique you use for flashing nodeMCU 0.9.6. You can refer the command below, which is what I used for flashing.

esptool.py --port /dev/ttyACM0 write_flash -fm qio 0x00000 nodemcu-master-8-modules-2016-12-16-09-52-59-float.bin