ESP8266 Community Forum

- Mon Jan 10, 2022 11:26 am #93312 Hi! Pretty new to ESP8266 programming, I had some pretty straightforward experiences with NodeMCU units and ESP8266 RTOS SDK.

I got a few ESP-12E units and code burner ( this one https://www.amazon.com/dp/B08P37JQYX - with ESP22E - not ESP01 )

photo_2022-01-10_11-21-36.jpg

Insofar I was not able to communicate with ESP-12E properly.

I tried to read flash ID with

Code: Select all esptool.py --port /dev/ttyUSB0 flash_id

but no matter what baudrate I supply - it always results in this

Code: Select all> esptool.py --port /dev/ttyUSB0 flash_id
esptool.py v2.4.0
Connecting........_____....._____....._____....._____....._____....._____....._____

A fatal error occurred: Failed to connect to Espressif device: Timed out waiting for packet header


With the MCU the output is as expected

Code: Select all> esptool.py --port /dev/ttyUSB0 flash_id
esptool.py v2.4.0
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
MAC: xx:xx:xx:xx:xx
Uploading stub...
Running stub...
Stub running...
Manufacturer: d8
Device: 4016
Detected flash size: 4MB
Hard resetting via RTS pin...


Same USB cable, so I ruled out the potential problem with USB.

When I try to communicate with TTY interface via minicom I get this after pressing flash+reset buttons and then releasing flash and reset.

Code: Select allbrlrl
ready


The contacts on the board look good and I also tried with a few more chips I received - the result is always the same.

Any ideas how that should work / whether I am missing something?

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