Some tutorials I can reference for interfacing with e-ink:

• ESP8266 suggested pinouts
• Another such example, displaying a QR code
• Lower level SPI communication
  • SPI tutorial
• GPIO example with STM32.

ESP8266 board: link. Following this article.

For Ubuntu 24.04, see SO:

user:~$ sudo apt install libfuse2t64
user:~$ sudo vim /etc/apparmor.d/usr.local.bin.arduino-ide.AppImage
abi <abi/4.0>,
include <tunables/global>
profile arduino /usr/local/bin/arduino-ide.AppImage flags=(unconfined) {
  userns,
  include if exists <local/arduino>
}
user:~$ sudo service apparmor reload

Additional board URL: http://arduino.esp8266.com/stable/package_esp8266com_index.json

Playing around with the Adafruit Huzzah Feather now. Note the USB chip is S/L CP2104, which will require driver installation (already part of Linux kernel):

user:~$ sudo dmesg
[  552.264660] usb 1-9.2: New USB device found, idVendor=10c4, idProduct=ea60, bcdDevice= 1.00
[  552.264679] usb 1-9.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  552.264684] usb 1-9.2: Product: CP2104 USB to UART Bridge Controller
[  552.264688] usb 1-9.2: Manufacturer: Silicon Labs
[  552.264692] usb 1-9.2: SerialNumber: 0285743E
[  552.290172] usbcore: registered new interface driver usbserial_generic
[  552.290195] usbserial: USB Serial support registered for generic
[  552.294267] usbcore: registered new interface driver cp210x
[  552.294309] usbserial: USB Serial support registered for cp210x
[  552.294372] cp210x 1-9.2:1.0: cp210x converter detected
[  552.295641] usb 1-9.2: cp210x converter now attached to ttyUSB0

Serial with 9600 8N1, pressing the reset button pulls up the in-built Lua interpreter. Switching on the LEDs manually (from Adafruit documentation):

^@^@^@0�~?�4�!�Y�OI:�COCE�!��OK,��                                              
                                                                                
NodeMCU 0.9.5 build 20150318  powered by Lua 5.1.4        
lua: cannot open init.lua                                 
> gpio.mode(3,gpio.OUTPUT)                                                   
> gpio.write(3,gpio.LOW)                                  
> gpio.write(3,gpio.HIGH)    

Using 11520 8N1 results in a "MEM CHECK FAIL!!!" message returned.