Adafruit Metro RP2040

• Quick overview
• Connections
  • Switches
    • Analog inputs
  • Rotary encoders
  • Potentiometers
  • FSRs
  • PWM outputs
  • Traffic indicators
  • I2C
  • DIN MIDI
  • Touchscreen
  • Bootloader switch
• Flashing
• Notes

Quick overview

• OpenDeck target name: metro_rp2040
• Power: USB C
• MCU: RP2040
• MIDI: USB, DIN
• OSC: No
• Traffic indicators: 2
• Digital inputs: 9
• Outputs: 5 (PWM / level control)
• Analog inputs: 3
• Board docs: Adafruit Metro RP2040
• Buy links:
  • Adafruit

Connections

Pinout to use as an reference to pins in later sections:

Switches

Switch #	Pin 1	Pin 2
0	GP2	GND
1	GP3	GND
2	GP4	GND
3	GP5	GND
4	GP6	GND
5	GP7	GND
6	GP24	GND
7	GP25	GND
8	GP29	GND

Analog inputs

Switch #	Pin 1	Pin 1	Pin 2
9	GP26	GND with 10k resistor	3V
10	GP27	GND with 10k resistor	3V
11	GP28	GND with 10k resistor	3V

Rotary encoders

Encoder #	Pin 1	Pin 2	Pin 3
0	GP2	GND	GP3
1	GP4	GND	GP5
2	GP6	GND	GP7
3	GP24	GND	GP25

Potentiometers

Potentiometer #	Pin 1	Pin 2	Pin 3
0	3V	GP26	GND
1	3V	GP27	GND
2	3V	GP28	GND

FSRs

FSR #	Pin 1	Pin 2	Pin 2
0	3V	GP26	GND with 1k resistor
1	3V	GP27	GND with 1k resistor
2	3V	GP28	GND with 1k resistor

PWM outputs

Note: current-limiting resistors for LEDs are required in order to avoid damage to the board.

Output #	Anode	Cathode
0	GP8	GND
1	GP9	GND
2	GP10	GND
3	GP11	GND
4	GP12	GND

Traffic indicators

Indicator	LED
USB input	GP13
USB output	GP13
DIN input	GP13
DIN output	GP13

I2C

Use the STEMMA QT connector for I2C.

Signal	Pin
Vcc	3V
GND	GND
SDA	SDA
SCL	SCL

DIN MIDI

This board doesn't have DIN MIDI connectors, so they have to be added to the board with the corresponding circuitry. Use this schematic:

MIDI In	MIDI out
GP1	GP0

Touchscreen

Screen	Pin
Vcc	5V
GND	GND
Rx	GP0
Tx	GP1

Bootloader switch

Hold OpenDeck switch 0 / GP2 low while resetting or powering the board to enter the OpenDeck bootloader.

Flashing

To flash this board with the OpenDeck firmware, go to the OpenDeck configurator and follow the instructions.

Notes

When UART is used, make sure to set the RX/TX switch near the Boot button to the right position.

DIN MIDI and touchscreen use the same UART pins on this board, so only one of them can be enabled at a time.