Example sketches for Phyduino boards. Each page below explains what the sketch does, how to wire it and what it prints, followed by its source. The same sketches are in the Arduino IDE under File → Examples → Examples for Phyduino Pico once Phyduino Pico is selected: Phyduino for the analog, USB-PD, multicore, FreeRTOS and CMSIS-RTOS2 sketches, SPI and Wire for those libraries.

Example	What it shows
Analog Millivolts	Every analog pin in millivolts
Analog Averaging	How averaging steadies a reading
Analog Differential	The voltage between two pins
Analog Read Multiple	All six analog pins at once, in the Serial Plotter
Analog Burst	A fixed-rate burst of samples, to see a waveform
Analog Burst Background	Continuous sampling in the background
USB-PD Power	Asking a USB-PD charger for a higher voltage
Multicore Basics	Two sketches at once, one on each core
Multicore FIFO	Handing work to the second core through rp2040.fifo
FreeRTOS Tasks	FreeRTOS tasks side by side, and the task list (needs FreeRTOS)
FreeRTOS Queue	Passing measurements between tasks through a queue (needs FreeRTOS)
CMSIS-RTOS2 Threads	Threads and a message queue with ARM's CMSIS-RTOS2 API (needs FreeRTOS + CMSIS-RTOS2)
SPI Loopback	An SPI loopback test
I2C Scanner	Finding the devices on the I2C bus
Peripheral Receiver	The board as an I2C peripheral