arduino › microcontroller board
adafruit Adafruit Metro M4 AirLift Lite
M4 + onboard ESP32 acting as a WiFi co-processor over SPI. The ESP32 here is *not* programmed as a main MCU — flash AirLift firmware, not Arduino sketches.
Specifications
- mcu chip
- atsamd51
- clock mhz
- 120
- flash kb
- 512
- sram kb
- 192
- wifi
- yes
- wifi band
- 2_4ghz
- bluetooth
- none
- usb
- micro_b
- gpio count
- 25
- analog inputs
- 6
- pwm pins
- 16
- i2c
- yes
- spi
- yes
- uart count
- 1
- operating voltage v
- 3.3
- input voltage range v
- 6-12
- power pins
- 3v3, 5v, vin
- firmware compat
- arduino_ide, circuitpython, platformio
- ai accelerator
- none
- form factor
- uno
Sources
- Adafruit open product catalog · ingest 2026-05-06