ESP8266 Community Forum

- Fri Oct 16, 2015 7:36 pm #31564

...First symptom is that module sometimes sends garbage on its serial port, but after a sw reset it is ok. Appearing garbage gets more often as module is used. At one point module sends only garbage and it cannot be healed further. The complete process takes 1-2 days with continous usage...

Hi ditor!
Try to set a terminal serie @ 74880 bauds to see if that garbage can be read.
I am having a dying situation, too http://www.esp8266.com/viewtopic.php?p=31448#p31448

BR,

Sergio//

- Sat Oct 17, 2015 8:23 am #31587 Thank you for replies!

Barnabybear:
I'm using a self-created library that does some gymnastic with the characters sent by ESP. I'm definitely NOT using new/malloc/stringclass or any other stuff that does dynamic memory allocation.
But I think my arduino code does not play in this story because the first module in it's half-bad state sometimes produced garbage through a 3.3V FTDI module connected to a PC and a single terminal program. When module died the garbage through FTDI became constant.
I'm using 1k and 2k resistor as a divider. (I tried greater values but the communication was not stable with that.)

kolban:
No, I'm not writing any flash memory during the usage of ESP.

sergio2015:
My first try was to lower the baud rate. I was able to set baud rate when module was dying and I ended up at 19200. Where the module became dead during a night-to-morning continous test. At the beginning there were no problems at 115200.
Your other thread is about 5V / firmware / capacitor. I power the module from 3.3V from the beginning. I flashed the module with the 0.9.5.2 AT firmware (it seems less buggy than others). I have a 10uF capacitor very near the power pins of the module.


I'm starting to think that I'm unlucky and get the modules from a bad hw series... they are from two ebay buying act, each of them cost only $2.5...

- Sat Oct 17, 2015 8:38 am #31589 I've had funny problems when using FT232 usb converter modules.
Have you tried a different usb converter,,, I went with a crystal controlled usb converter
got from aliexpress [prolific driver required , D-SUN usb-->TTL] , very few problems since.

- Sun Oct 25, 2015 1:46 pm #32257 Finally I've got two more modules from ebay and they have been working for three days without problems in the same hardware and software environment. So I must had bad modules before...
Thanks again for your replies.
D