Data Sheet

2 Module interfaces
Pin number Symbol Type Function
4 A_0 I/O GPIO_0. It cannot
be pulled up
during powering
on.
5 A_12 I/O GPIO_12
6 ADC AI ADC port, the max
input voltage 5V
7 A_5 I/O GPIO_5
8 3.3V P Power supply pin
(3.3V)
9 GND P Power supply
reference ground
10 A_19 I/O GPIO_19
11 A_22 I/O GPIO_22
12 Log_TX I/O UART_Log_TXD
(used to display
the internal
information of the
module)
13 Log_RX I/O UART_Log_RXD
(used to display
the internal
information of the
module)
14 GND P Power supply
reference ground
15 VIN I/O External input
voltage (5V)
16 TXD I/O UART0_TXD
(user-side serial
port)
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