to: all -
I am running the Arduino IDE from Ubuntu 18 Linux
In the past (one week ago and before that) I could upload any sketch to an ESP8266 NodeMCU and (with the same usb cable) to a Wemos D1 mini, and the sketch would run. No problems. No problems with all other boards in my collection.
What is happening now a couple of days is that uploading to a NodeMCU is OK, while attempts to upload to the same Wemos D1 mini (and other D1 minis) produces the error message: "esptool.FatalError; failed to connect to ESP8233: Timed out waiting for packet header.'
If I unplug the Wemos D1 mini, replug the NodeMCU and upload the same sketch - no problem.
Uploading the same sketch with the same Wemos D1 mini and using the same cable - from a Windows 10 system: no problem.
Obviously there is a communication (serial port?) problem between the Linux machine that exists only with my dear Wemos D1 minis and not with NodeMCUs. I am uploading to Arduino Unos, Nanos and ESP32's from the same port, no problem, only Wemos D1 mini.
Any suggestion what to do?