arduino-pico VS lufa

I managed to get the Arduino IDE to work great with my Pi Pico's using earlephilhower/arduino-pico and TinyUSB in the USB stack. I can code for MIDi and do all kinds of neat stuff... But...

I am trying to build a data logger. Currently my hardware is a Raspberry Pi Pico W, a SHT41 (https://www.adafruit.com/product/5776), and a small breadboard. Software is Arduino IDE, arduino-pico (https://github.com/earlephilhower/arduino-pico), and Adafruit_SHT4X library (https://github.com/adafruit/Adafruit_SHT4X).

The standard Pico w SDK has examples for Bluetooth classic, serial connection, mouse control, keyboard control etc... Everything you need can be found HERE

If you want more guidance, you could use the Arduino framework https://github.com/earlephilhower/arduino-pico

If you are using the earlephilhower implementation of the Arduino Core for Pico, wifi is documented here: wifi docs

rp2040 is really powerful its not a conventional "desktop" raspberry pi, its a microcontroller similar to stm32 or the avr boards that the arduino uses. https://github.com/earlephilhower/arduino-pico for arduino support.

Do you want to do serial communications along with USB HID (keyboard)? Sure, you can do that with TinyUSB. I've done it with the arduino-pico core: https://github.com/earlephilhower/arduino-pico

* QMK Toolbox 0.2.2 (https://qmk.fm/toolbox)* Supported bootloaders:* - ARM DFU (APM32, Kiibohd, STM32, STM32duino) via dfu-util (http://dfu-util.sourceforge.net/)* - Atmel/LUFA/QMK DFU via dfu-programmer (http://dfu-programmer.github.io/)* - Atmel SAM-BA (Massdrop) via Massdrop Loader (https://github.com/massdrop/mdloader)* - BootloadHID (Atmel, PS2AVRGB) via bootloadHID (https://www.obdev.at/products/vusb/bootloadhid.html)* - Caterina (Arduino, Pro Micro) via avrdude (http://nongnu.org/avrdude/)* - HalfKay (Teensy, Ergodox EZ) via Teensy Loader (https://pjrc.com/teensy/loader_cli.html)* - LUFA/QMK HID via hid_bootloader_cli (https://github.com/abcminiuser/lufa)* - LUFA Mass Storage* Supported ISP flashers:* - AVRISP (Arduino ISP)* - USBasp (AVR ISP)* - USBTiny (AVR Pocket)* Auto-flash enabled* Auto-flash disabled* Auto-flash enabledUSB device disconnected (CH341SER_A64): wch.cn USB-SERIAL CH340 (COM15) (1A86:7523:0264)USB device connected (CH341SER_A64): wch.cn USB-SERIAL CH340 (COM15) (1A86:7523:0264)

I briefly checked its code - wrapping it for reasonably convenient use with Arduino IDE would be not that simple. USB is quite abstract protocol and a particular device type requires a matching handler code. You can find example for keyboard HID here: https://github.com/abcminiuser/lufa/tree/master/Demos/Device/ClassDriver/Keyboard - as you can see, there is not so small amount of code for handling it: even though all really hard work is done inside the library, you still need to make a lot of proper calls to make it work.

For AVR devices I've always liked LUFA because it has tons of examples to get you started and works great even on low-end devices like the AT90USB162 (16MHz 8-bit cpu with 512 bytes of SRAM).