Platform details:
OS: Raspberry OS 10 / Buster (32-bit)
User: Default "pi"
Arduino IDE: 1.8.15, downloaded (not installed via apt or snap)
Primary symptom: Trying to load a sketch to known working Nano Connect results in error "An error occured while uploading the sketch"
Additional symptoms: Nano Connect serial port disappears, removable storage popup comes up
Fix: run $ sudo /home/pi/.arduino15/packages/arduino/hardware/mbed_rp2040/2.4.1/post_install.sh
Thanks to YouTuber "an Erik"
So I purchased a Waveshare Pi Pico kit. Upon trying to get the included 16x2 LCD ("LCD1602") module working, I discovered that most of the popular published examples actually use a different chipset (HD44780 vs AiP31068L on the RGB Waveshare board). Wiring is also different.
Web searches were not useful in finding a fix, but a chat with the friendly folk over at Waveshare pointed me in the direction of their excellent product wiki page. Under the "Guides for Pico" section, there is a link (accurate at the time of writing) to their own libraries and examples.
Note that the non-RGB Waveshare LCD1602 states HD44780 compatibility, so if this is the one you have you should be good to go with the existing tutorials and libraries.
