ESP8266 Community Forum

Posted: **Wed May 06, 2015 10:02 pm**

I've been trying to upload an example sketch, and I've been coming across some interesting errors, sadly they don't even pop up on Google...

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error: unslip sequence wrong
warning: espcomm_cmd: cant receive slip payload data
warning: espcomm_sync failed
error: espcomm_open failed

and occasionally

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.
error: failed reading byte
warning: espcomm_cmd: cant receive slip payload data
error: failed reading byte
warning: espcomm_cmd: cant receive slip payload data
warning: espcomm_sync failed
error: espcomm_open failed

Any thoughts on what's going wrong?

Right now I have
CH_PD - High
GPIO2 - High
GPIO15 - Low
GPIO0 - Low

with all other pins floating (excecpt VCC and GND of course)

Posted: **Thu May 07, 2015 9:42 am**

I have the same problem trying to program ESP-07

Posted: **Thu May 07, 2015 7:47 pm**

I had the same problem, seems to be common on OSX. I found this thread which had a fix:
https://github.com/esp8266/Arduino/issues/3

Relevant details (credit to : https://github.com/sticilface)
esptool isn't working, however esptool.py does. Therefore we need to setup another programmer option called pyesptool.

1) Download contents of https://github.com/themadinventor/esptool.git to {Arduino.app}/Contents/Java/hardware/tools/esp8266/pyesptool/

2) Add to bottom of platforms.txt

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tools.pyesptool.cmd=esptool.py
tools.pyesptool.cmd.windows=esptool.exe
tools.pyesptool.path={runtime.ide.path}/hardware/tools/esp8266/pyesptool
tools.pyesptool.program.params.verbose=""
tools.pyesptool.program.params.quiet="" 
tools.pyesptool.program.pattern=python "{path}/{cmd}" {program.verbose} --port {serial.port} write_flash 0x00000 "{build.path}/{build.project_name}_00000.bin" 0x40000 "{build.path}/{build.project_name}_40000.bin"

3) Add to bottom of programmers.txt

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pyesptool.name=pyesptool
pyesptool.communication=serial
pyesptool.protocol=esp
pyesptool.program.protocol=esp
pyesptool.program.tool=pyesptool
pyesptool.program.extra_params=

4) I had problems with this using the default version of Python instead of the homebrew version I have installed. This caused the library to die reporting that it couldn't import serial. To fix this I modfiied the platforms.txt program.pattern to point to /usr/local/lib/python instead of using python. I wish that this respected the order of paths in the /etc/paths file.

Hopefully this will make it into the mainline project before too long.

Posted: **Fri May 08, 2015 4:48 pm**

I ran into the same problems...

Just add my 0,02ç:

1) platform.txt / programmers.txt live in [Arduino.app]/Contents/Java/hardware/esp8266com/esp8266

2) I also encountered the 'import serial error'. This was resolved by doing: "sudo pip install pyserial" (using python 2.7.x) as I only had one version of python installed. I troubleshooted the error by launching the python interpreter and issuing 'import serial'.

Thank you for your help!

ESP8266 Community Forum

Various Different Errors while uploading code.

Various Different Errors while uploading code.

Re: Various Different Errors while uploading code.

Re: Various Different Errors while uploading code.

Re: Various Different Errors while uploading code.