ESP8266 Community Forum

- Fri Oct 23, 2015 4:32 pm #32147 Hi,
I tried to flash the "NodeMcu Amica V3 ESP-12E ESP12E 4MB FLASH Lua WIFI Networking dev board ESP8266" from ebay with the esphttpd webserver using the esptool.py. On windows it works perfekt, but I want to compile and flash it under linux and with the same params it fails each time with:

Code: Select allConnecting...
Traceback (most recent call last):
  File "./esptool.py", line 532, in <module>
    esp.connect()
  File "./esptool.py", line 159, in connect
    raise Exception('Failed to connect')
Exception: Failed to connect

I used Ubuntu 14.04.3 LTS (GNU/Linux 3.13.0-65-generic i686 with the latest CP210x driver source.
What are the differences on driver for win and linux?
Any other tools for linux to flash the binaries?

Best Regards
Mr.Tom

- Sat Oct 24, 2015 2:21 pm #32204 Ok.. I found the solution
After some modifications on esptool.py I've got the exception details:
In the function connect I've got the exception:

Code: Select alldevice reports readiness to read but returned no data (device disconnected?)

After some google'ing I've found this article
https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1501345
Ok.. a kernel bug..
With kernel "linux-image-3.13.0-65-generic 3.13.0-65" this bug kills the esptool.
Ok.. update the kernel:

Code: Select allapt-get update
apt-get upgrade
apt-get distupgrade
reboot

Check for the correct kernel

Code: Select alluname -a
Linux SHOP-PC 3.13.0-66-generic #108-Ubuntu SMP Wed Oct 7 15:21:40 UTC 2015 i686 i686 i686 GNU/Linux


Code: Select allErasing flash...
Wrote 34816 bytes at 0x00000000 in 1.1 seconds (262.8 kbit/s)...
Erasing flash...
Wrote 181248 bytes at 0x00040000 in 5.5 seconds (261.9 kbit/s)...

Leaving...

Yeah.. and it works...