I added myself to the dialout group in case I needed rw on the port because...

ls -l /dev/ttyUSB0

crw-rw---- 1 root dialout 188, 0 Feb 24 15:18 /dev/ttyUSB0

Switched to my new groups so it would take effect with T383838su - user.

NixOS has T383838arduino-cli in the repo, so

nix-shell -p arduino-cli

Listing connected boards:

arduino-cli board list

Port Protocol Type Board Name FQBN Core

/dev/ttyS0 serial Serial Port Unknown # I don't know what this is, will check out later

/dev/ttyUSB0 serial Serial Port (USB) Unknown # it's this one

Need support for the board in use (ESP32 devkit v1 for the ESP32 WROOM). Used the Arduino gui for this (also in NixOS) because I'm just not familiar with the process.

Boards ESP32 (essprif something?) ESP32 Dev Module

The T383838-b option needs the value T383838esp32:esp32:esp32 and then the baud rate, which is oddly T383838UploadSpeed instead of T383838baud.

In this case T383838GetChipID is a directory containing T383838GetChipID.ino from the library of examples.

I could have grabbed this from the filesystem at ...

~/.arduino15/packages/esp32/hardware/esp32/2.0.11/libraries/ESP32/examples/ChipID/GetChipID/GetChipID.ino

For example:

arduino-cli compile -b esp32:esp32:esp32 GetChipID

arduino-cli upload -p /dev/ttyUSB0 -b esp32:esp32:esp32:UploadSpeed=115200 GetChipID

arduino-cli monitor -p /dev/ttyUSB0 -b esp32:esp32:esp32:UploadSpeed=115200

Viewing the serial connection was weird with the above, so use minicom and reset it and just view it through minicom.

minicom -D /dev/ttyUSB0

Ctrl+A Z

P

E

Esc

Tags: cli, raw

created: 2024-02-24

(re)generated: 2026-07-17