Board Comparison (interim)

Device	Arch	Mhz	I/O Pins	Analog In	PWM	DAC
BBC micro:bit	NRF51	16	20	5	5	-
Calliope Mini	NRF51	16	20	4	4	-
Circuit Playground	SAMD21	48	8	8	8	10-bit
MKR Zero	SAMD21	48	22	7	12	10-bit
Zero	SAMD21	48	20	6	12	10-bit
M0	SAMD21	48	20	6	12	10-bit
NodeMCU	ESP8266	80	12	1	-	-
ESP32	ESP32	160	34	12	16	8-bit (x2)
RPi Zero (W)	ARM A53	1000	16	-	2	-
RPi PICO	RP2040	133	26	3	16	-

Device	Reset Button	User Buttons	LEDs	tilt	temp	light	speaker	neopix	other
BBC micro:bit	y	2	25	y	y	y	-	-	radio or BLE
Calliope Mini	y	2	25	y	y	y	y	1	radio or BLE, motor
Circuit Playground	y	2	1	y	y	y	y	10	microphone, IR in/out, slide switch, file sys
Citilab ED1	y	6	1	y	y	y	y	-	WiFi, TFT, IR in, 2 stepper motor ports, lipo battery
M5 Stack	y	3	-	y	y	-	y	-	WiFi, TFT, (tilt on Grey only), TF card slot, lipo battery
M5 StickC	y	2	1	y	y	-	-	-	WiFi, TFT, microphone, IR out, RTC, lipo battery
M5 Atom Matrix	y	1	-	y	y	-	-	25	WiFi, IR out
MKR Zero	y	-	1	-	-	-	-	-	Micro SD, file sys
Zero	y	-	1	-	-	-	-	-
M0	y	-	1	-	-	-	-	-
NodeMCU	y	1	1	-	-	-	-	-	WiFi, file sys
ESP32	y	1	1	-	-	-	-	-	WiFi, Bluetooth, file sys
RPi Zero (W)	-	-	-	-	-	-	-	-	WiFi, file sys
RPi PICO	-	-	1	-	-	-	-	-	USB 1.1 with host and device support, file sys

¶ I/O Capabilities