ESPEasy

Flash the firmware

$ sudo apt install --yes esptool
$ wget https://github.com/letscontrolit/ESPEasy/releases/download/mega-20200515/ESPEasy_mega-20200515.zip
$ esptool --port /dev/ttyUSB0 --baud 115200 write_flash 0 ESP_Easy_mega_20200516_test_beta_ESP8266_4M1M.bin
esptool.py v2.8
Serial port /dev/ttyUSB0
Connecting...
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: 3c:71:bf:2a:a6:0b
Enabling default SPI flash mode...
Configuring flash size...
Auto-detected Flash size: 4MB
Erasing flash...
Took 2.33s to erase flash block
Writing at 0x000dbc00... (87 %)

Connect via Serial

$ minicom -D /dev/ttyUSB0 --baudrate 115200
Welcome to minicom 2.8

OPTIONS: I18n 
Port /dev/ttyUSB0, 10:28:08

Press CTRL-A Z for help on special keys

Posssible commands via serial connection

Configure your local wifi credentials

• WifiSSID <myssid>
• WifiKey <mypassword>
• WifiConnect
• Save

Reboot

• Reboot

Delete the whole configuration

Be careful! Do you want this? This deletes the whole configuration but not the Firmware.

• Reset

Problems

interface 0 claimed by ch341 while 'brltty' sets config #1

Oct  9 14:40:06 lollybook kernel: [372389.769039] usb 3-1.4.3: ch341-uart converter now attached to ttyUSB0
Oct  9 14:40:07 lollybook kernel: [372390.769995] usb 3-1.4.3: usbfs: interface 0 claimed by ch341 while 'brltty' sets config #1
Oct  9 14:40:07 lollybook kernel: [372390.771187] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0
Oct  9 14:40:07 lollybook kernel: [372390.771258] ch341 3-1.4.3:1.0: device disconnected

I found this:

• Unable to use USB dongle based on USB-serial converter chip

for f in /usr/lib/udev/rules.d/*brltty*.rules; do
    sudo ln -s /dev/null "/etc/udev/rules.d/$(basename "$f")"
done
sudo udevadm control --reload-rules

But I also had to disable the brltty-udev.service

$ sudo systemctl stop brltty-udev.service
$ sudo systemctl mask brltty-udev.service
Created symlink /etc/systemd/system/brltty-udev.service → /dev/null.

After disabling brltty I finally got:

Oct  9 14:41:30 lollybook kernel: [372473.985072] ch341 3-1.4.3:1.0: ch341-uart converter detected
Oct  9 14:41:30 lollybook kernel: [372473.987063] usb 3-1.4.3: ch341-uart converter now attached to ttyUSB0