TM1637 with Raspberry Pi Pico 2

Wiring for the TM1637 4-digit 7-segment display on the Raspberry Pi Pico 2 (RP2350, 3.3 V logic), chosen with the same pin rules BoardPilot uses: default buses first, and no pins that are used for flash, USB, the debugger or booting.

Wiring

TM1637 pin	Role	Raspberry Pi Pico 2 pin	Notes
CLK	Input to the part	GP15	Clock (not I2C, not SPI)
DIO	Input to the part	GP14	Data (not I2C)
GND	Ground	GND
5V	Power	3V3(OUT)	Works at 3.3 V or 5 V

Check before you power it on

Supply: 3.3 V from the 3V3(OUT) pin.

Test code (Arduino)

// Library: TM1637 (Avishay Orpaz)
#include <TM1637Display.h>

TM1637Display display(15, 14);  // CLK, DIO

void setup() {
  display.setBrightness(4);
}

void loop() {
  display.showNumberDec(millis() / 1000);  // seconds since start
  delay(200);
}

Arduino board: rp2040:rp2040:rpipico2. If the board is not found, hold the BOOTSEL button while plugging in the USB cable.

Questions

Which Raspberry Pi Pico 2 pins do I use for the TM1637?

CLK → GP15, DIO → GP14, GND → GND, 5V → 3V3(OUT).

Does the TM1637 work with the Raspberry Pi Pico 2 at 3.3 V?

Yes: the TM1637 runs at 3.3-5 V and the Raspberry Pi Pico 2 uses 3.3 V signals, so no level shifting is needed.

BoardPilot checks this wiring in 3D as you build it, and finds crossed or missing wires on the real board.

Download BoardPilot

Full Raspberry Pi Pico 2 pinout · TM1637 4-digit 7-segment display: all pins and data

The TM1637 on other boards

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