ESP8266 Community Forum

- Tue Apr 28, 2020 2:36 am #86791 i have 2 esp01's that worked correct before, but right now i cannot get them to either run or flash:
the first(esp01s)
root@omv:~/esptool# python ./esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py v3.0-dev
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: cc:50:e3:15:7a:04
Uploading stub...
Running stub...
Stub running...
Erasing flash (this may take a while)...

A fatal error occurred: Timed out waiting for packet header


the second one: (esp01)

root@omv:~/esptool# python ./esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py v3.0-dev
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: a0:20:a6:15:2f:28
Uploading stub...
Running stub...
Stub running...
Erasing flash (this may take a while)...
Chip erase completed successfully in 2.4s
Hard resetting via RTS pin...

root@omv:~/esptool# python esptool.py --port /dev/ttyUSB0 write_flash -fm qio 0x00000 firmware.bin
esptool.py v3.0-dev
Serial port /dev/ttyUSB0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: a0:20:a6:15:2f:28
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 1MB
Flash params set to 0x0020
Compressed 520192 bytes to 231226...
Wrote 520192 bytes (231226 compressed) at 0x00000000 in 20.3 seconds (effective 204.6 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...


its flashing ok, but never creates an accesspoint
It does get really hot though

- Wed Apr 29, 2020 7:45 am #86806 Please show us your schematics, it sounds like you have been powering (or flashing) them with 5V (or higher?).

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.

- Thu Apr 30, 2020 2:07 am #86825 using these to program:
https://nl.aliexpress.com/item/32695356 ... lsrc=aw.ds

so no 5v

after programming powered by these at 3.3 v