0
\$\begingroup\$

I have the following circuit for updating custom firmware to my esp8266-12e module. I've tried many variations for GPIO0, GPIO2, but none of them works. I use the Arduino IDE to make hex files, and then I upload the binary using esptool.py with the following command: python esptool.py --baud 115200 -p /dev/cu.SLAB_USBtoUART write_flash 0x00 /Users/blahblah/Documents/ArduinoBinary/WiFiWebServer.cpp.bin enter image description here

\$\endgroup\$
  • \$\begingroup\$ I was unable to get mine to flash with resistors either, and had to connect the GPIOs directly to the source. My board does look quite a bit different though. \$\endgroup\$ – Ignacio Vazquez-Abrams Jan 22 '16 at 12:59
1
\$\begingroup\$

Try following ESP8266: flash module firmware post. I've used those steps on ESP-07 and ESP-01 module several times. There should be no need for resistors unless specifically required by ESP-12 module. If it still fails try to eliminate software issues as the problem by using windows flasher as per the post as that is known to work. Also do not use a breadboard as it can cause issues.

Here's a working schematic for ESP-07 module and by the looks of it it should be the same for ESP-12:

enter image description here

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.