Board Technical Specifications Comparison

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Espressif ESP32-S2-Saola vs. Variscite VAR-SOM-MX8M-PLUS vs. Xunlong Software Orange Pi 2G-IOT vs. FriendlyElec NanoPi M4

	× ESP32-S2-Saola	× VAR-SOM-MX8M-PLUS	× Orange Pi 2G-IOT	× NanoPi M4
Manufacturer	Espressif	Variscite	Xunlong Software	FriendlyElec
Price	$ 8.0	-	$ 10.0	$ 65.0
SoC	Espressif ESP32-S2 (WROVER or WROOM)	NXP iMX8M Plus	RDA Micro 8810PL	Rockchip RK3399
CPU	1× Tensilica Xtensa LX7 (RISC) @ 240 Mhz	4× ARM Cortex-A53 @ 1.8 Ghz	1× ARM Cortex-A5 @ 1.0 Ghz	2× ARM Cortex-A72 @ 2.0 Ghz 4× ARM Cortex-A53 @ 1.5 Ghz
GPU	-	GC7000UL, GC520L	Vivante GC860	Mali-T860 MP4
RAM	2.0 MiB	4.0 GiB LPDDR4 with ECC	-	2.0 GiB DDR3
eMMC	1 × soldered	1 × soldered	1 × soldered	1 × soldered
USB	1 of which support USB-OTG	2 × host ports 2 of which support USB-OTG	1 × host port 1 of which support USB-OTG	4 × host ports 1 of which support USB-OTG
Ethernet		1× 1 Gbps		1× 1 Gbps
Wi-Fi	On-board Wi-Fi without external antenna 2.4Ghz b/g/n	On-board Wi-Fi without external antenna 2.4Ghz b/g/n 5Ghz a/n/ac	On-board Wi-Fi without external antenna 2.4Ghz b/g/n	On-board Wi-Fi without external antenna 2.4Ghz b/g/n 5Ghz a/n/ac
Bluetooth	-	onboard	onboard	onboard
Modem	-	-	onboard	-
Camera	up to 1 x inputs	up to 2 x inputs	up to 1 x inputs	up to 2 x inputs
Audio	-	1 × outputs 1 × line-in 1 × mic-in 1 × spdif-out 6 × I2S	1 × outputs	1 × outputs 1 × spdif-out 1 × I2S
GPIO	43	104	40	40
PWM	8	4	1	1
ADC	2	-	1	-
I2C	2	6	1	2
SPI	4	3	1	3
UART	2	4	1	1
CAN	-	2	-	-
Pin header	-	-	-	HAT (Raspberry Pi)
Dimensions	54 mm x 28 mm	68 mm x 33 mm	68 mm x 42 mm x 9 mm	85 mm x 56 mm
Temperature	-	-40.0°C - 85.0°C	-10.0°C - 65.0°C	-20.0°C - 80.0°C
Software	-	Linux: True Android: Yes	Linux: True Android: 4.4	Linux: True Android: 7.1