ESP8266 Community Forum

- Fri Sep 04, 2015 5:19 am #27788 Hoping some here might be able to help. For the life of me, I can't get any of the flashers or firmwares to work. I've used espressifs tools, followed exactly their instructions, I've used the nodemcu tools and flashed the espressif firmwares, and I've used any number of different combinations.

All I'm trying to get is an AT command accepting ESP chip. I have about 10, from two different vendors.

I followed these instructions to the letter.

http://www.instructables.com/id/Blink-f ... /?ALLSTEPS

I used exactly that flasher, with exactly those firmwares, with exactly those offsets. It even told me it had completed the operation. All I get when I try to connect via a terminal is either garbage, or fatal errors like this :

Fatal exception (0): epc1=0x402415a4, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

Are there any people that have gotten this working? Are there any instrution/download sets that work?

- Fri Sep 04, 2015 7:39 am #27799 Mr Dave Vandenbout steered me the right way.

http://www.xess.com/blog/esp8266-reflash/

I didn't use espressif firmware, I used the electrodragon AT firmware

http://www.electrodragon.com/w/ESP8266_ ... d_firmware

... and tested it out on two different ESP-12's tonight. The flashing rig of Mr Vandenbout is definitely a winner if you're going to be making a few of these things.

- Sat Sep 05, 2015 6:13 pm #27896 My ESP-01 flash board is almost the same, with the two pushbuttons for reset and program, except that I wired the program button (to GPIO0) in the same fashion as the reset: a pullup, and the button pulls the pin to ground. H have an onboard 3.3v reg so I can power the board from a 5v bench supply. I also brought out +3.3v, ground and GPIOs 0 and 2 to a 4-pin header so I can test the firmware right away with I/O (sensors etc)

This has been effective for several months. I'm quite talented now at hitting both buttons at once then releasing the reset first to enter programming mode.

Mr Vandenbout uses PuTTY as the terminal app...it's OK, but I've found that termite.exe is easier since it can be configured to do the \r\n after hitting enter, which simplifies testing the AT manually.