Board-specific wiring maps

Wire Tagger-101 by GPIO number.

Pick the same ESP32 board you selected on the flasher page. The map gives you the GPIO for each Tagger-101 signal and the short notes needed to avoid the easy wiring mistakes.

Wire After Flashing

Flash the bare board first. After it boots, disconnect USB power before adding wiring. Keep every module on 3.3 V logic, use one shared ground, and never drive an IR LED strip or motor directly from a GPIO pin.

Tagger-101

Tagger build with IR transmitter, hit receiver, trigger, reload, feedback, and OLED screen.

Launch

Board

ESP32-C3 pins

GPIO numbers match the firmware pin profile for this board family.

Part	GPIO	Beginner note
IR LED driver	`GPIO7`	Driver input; LED current must come through a separate driver circuit.
IR receiver OUT	`GPIO5`	Receiver output pin.
Trigger button	`GPIO4`	Button connects GPIO to GND.
Reload button	`GPIO3`	Button connects GPIO to GND.
Piezo	`GPIO1`	Piezo to GND.
Vibration motor	`GPIO0`	Driver input.
OLED SCL / SDA	`GPIO20` / `GPIO21`	OLED I2C pair.

ESP32-WROOM module pins

GPIO numbers match the firmware pin profile for this board family.

Part	GPIO	Beginner note
IR LED driver	`GPIO25`	Driver input; LED current must come through a separate driver circuit.
IR receiver OUT	`GPIO26`	Receiver output pin.
Trigger button	`GPIO27`	Button connects GPIO to GND.
Reload button	`GPIO34`	Add 10 kOhm pull-up to 3V3; button pulls to GND.
Piezo	`GPIO32`	Piezo to GND.
Vibration motor	`GPIO33`	Driver input.
OLED SCL / SDA	`GPIO22` / `GPIO21`	OLED I2C pair.

ESP32-S3 pins (untested)

GPIO numbers match the firmware pin profile for this board family.

Part	GPIO	Beginner note
IR LED driver	`GPIO17`	Driver input; LED current must come through a separate driver circuit.
IR receiver OUT	`GPIO16`	Receiver output pin.
Trigger button	`GPIO15`	Button connects GPIO to GND.
Reload button	`GPIO14`	Button connects GPIO to GND.
Piezo	`GPIO12`	Piezo to GND.
Vibration motor	`GPIO13`	Driver input.
OLED SCL / SDA	`GPIO9` / `GPIO8`	OLED I2C pair.