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cnlohr / espusb

Software-only ESP8266 USB Device
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Error on esptool.py: A fatal error occurred: Invalid head of packet ('\xe0') #8

Closed leopck closed 3 years ago

leopck commented 8 years ago

I just pulled your latest commit and make the application, it seems that I'm having this issue on my Ubuntu 16.04 machine to burn into my NodeMCU

esptool.py v1.2-dev
Connecting...
Running Cesanta flasher stub...

A fatal error occurred: Invalid head of packet ('\xe0')

I checked the user.cfg and found the issue (for me at least) to be FWBURNFLAGS = -b 1000000 after changing this to FWBURNFLAGS = -b 115200 or `FWBURNFLAGS = -b 1500000 I can burn into my NodeMCU nicely.

Does FWBURNFLAGS = -b 1000000 work for you?

and saw the esp82xx really great job there!

cnlohr commented 8 years ago

-b 1000000 works for me, but so does 1,500,000. Perhaps we should leave this issue here for others to chime in!

I know I'm weird. I use $0.90 USB to serial adapters.. http://www.electrodragon.com/product/usb-ttl-serial-ch340-board/

leopck commented 8 years ago

So here's some update, I took some of the USB-Serial I have around and tested and you're right. Somehow it works very nicely with CH340, PL-2303HX and FTDI232 however, testing again using the CP2102, it doesn't work and gives that error Invalid head of packet ('\xe0') hence, the NodeMCU that is also based on CP2102 is also showing this error.

Not a big issue, just change the FWBURNFLAGS = -b 115200 or FWBURNFLAGS = -b 1500000. If someone else can verify this then we can close this.

john7doe commented 7 years ago

I can confirm that changing the setting to 115200 helped me. Using a CP2102 based dongle on osx 10.11.3

cnlohr commented 7 years ago

I think I'll leave this issue open forever :-p

umotesla commented 7 years ago

I can confirm this always happens with CP2102, while perfectly working with FTDI

cnlohr commented 7 years ago

Yep. 1500000 vs 1000000 vs 2000000 baud. When you get the crazy high speeds, it is device-dependent.

alkopop79 commented 5 years ago

Where can I find the user.cfg file on Mac OS X?

elasticdotventures commented 5 years ago

Just wanted to chime in that by further reducing the baud rate from 115200 to 57600 it solved a similar issue:

Chip is ESP32D0WDQ6 (revision 1) Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None MAC: xx:xx:xx:xx:xx Uploading stub...

A fatal error occurred: Invalid head of packet (0x65)

gardendave commented 5 years ago

thanks for leaving this open.
115200 worked for me.

FlackMonkey commented 5 years ago

Confirm to have issue, and solved by 115200 flashing speed for ESP32 (TTGO mini T7 v1.3)

reppr commented 5 years ago

Same issue on Geekworm KE-WROVER-C20 EASY KIT ESP32_WROVER 8MB PSRAM fiddling with the boot button (labeled "USER" on this board) did not help upload speed 115200 works well

leon-v commented 3 years ago

Just wanted to chime in that by further reducing the baud rate from 115200 to 57600 it solved a similar issue:

Chip is ESP32D0WDQ6 (revision 1) Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None MAC: xx:xx:xx:xx:xx Uploading stub...

A fatal error occurred: Invalid head of packet (0x65)

In my case, the devkit was expecting 115200 and the idf was set to 460800

cnlohr commented 3 years ago

It is very unusual that 460800 is outside of a viable upload speed, but, with weird USB-serial chips that makes some sense.

cnlohr commented 3 years ago

Also, I am going to close this issue, since it is basically resolved for anyone who would care, and does not reflect an issue with the codebase.