ESP8266 Community Forum

Hi!

I ordered recently few ESP-12F modules from https://pl.aliexpress.com/item/32349713 ... 5c0fE2gUrc. I received slightly different than the ones presented on the photo (they are branded by Doiting instead of AI Thinker).

When I powered on one of the modules I got following error:


I erased flash using esptool and uploaded some simple app from ESP8266 RTOS SDK examples. After powering up module is stuck at this point:


Tried also with another piece and it's all the same.

I used already few other modules (mainly ESP-12E) with the same circuit and never encountered such problem.
Does it mean that modules I've got are just fake/broken?
Maybe someone had similar problem?

Symeg wrote:Hi!

I ordered recently few ESP-12F modules from https://pl.aliexpress.com/item/32349713 ... 5c0fE2gUrc. I received slightly different than the ones presented on the photo (they are branded by Doiting instead of AI Thinker).

When I powered on one of the modules I got following error:

Code: Select allFatal exception (0):
epc1=0x40100000, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x0
0000000
0x40100000: _stext at ??:?


I erased flash using esptool and uploaded some simple app from ESP8266 RTOS SDK examples. After powering up module is stuck at this point:

Code: Select all ets Jan  8 2013,rst cause:2, boot mode:(3,7)

ets_main.c

Tried also with another piece and it's all the same.

I used already few other modules (mainly ESP-12E) with the same circuit and never encountered such problem.
Does it mean that modules I've got are just fake/broken?
Maybe someone had similar problem?

Hi buddy, yes exact same issue. Tried contacting via support mail but no real world solution. Any update on your side?

Regards,
Loce

I had one too about a year ago. After I pried/desoldered open the tin shielding, I saw that a number of pins were shorted out on the ESP8266 chip.
I gave up on trying to fix that, although with lots of flux and luck it should be possible.
I accepted defeat and just used a propely working one.

Hi!

I had some issues recently with some doit.am ESP12 modules. Here's my story:

https://geekenargentina.wordpress.com/2019/10/08/esp8266-connectivity-troubleshooting/

TL;TR: To remove a wrong cap in the antenna was the solution

Please let me know if the same apply to you, I suspect a big batch of them out there.

Román