Orange Pi PC H3 GPIO Pin Mapping

Physical Pin	Name / Function	GPIO Number (sysfs)	Notes
1	3.3V	—	Power
2	5V	—	Power
3	PA12 / I2C1_SDA	12	I2C1 SDA
4	5V	—	Power
5	PA11 / I2C1_SCL	11	I2C1 SCL
6	GND	—	Ground
7	PC4 / UART2_TX	68	UART2 TX
8	PC5 / UART2_RX	69	UART2 RX
9	GND	—	Ground
10	PA0 / SPI0_CS	0	SPI CS
11	PA1 / SPI0_CLK	1	SPI Clock
12	PA2 / SPI0_MOSI	2	SPI MOSI
13	PA3 / SPI0_MISO	3 / 71	SPI MISO (GPIO2_B7 = 71)
14	GND	—	Ground
15	PA6	6	GPIO
16	PA7	7	GPIO
17	3.3V	—	Power
18	PA8	8	GPIO
19	PA9	9	GPIO
20	GND	—	Ground
21	PA10	10	GPIO
22	PA14	14	GPIO
23	PA15	15	GPIO
24	PA16	16	GPIO
25	GND	—	Ground
26	PA17	17	GPIO
27	PC0	64	GPIO
28	PC1	65	GPIO
29	PC2	66	GPIO
30	GND	—	Ground
31	PC3	67	GPIO
32	PC6	70	GPIO
33	PC7	71	GPIO
34	GND	—	Ground
35	PB0	32	GPIO
36	PB1	33	GPIO
37	PB2	34	GPIO
38	PB3	35	GPIO
39	GND	—	Ground
40	PB4	36	GPIO