Data Sheet

3 MODULE INTERFACES
Pin Number Symbol I/O Type Function
11 LOG_TX O UART0_TXD (used
to display the
internal
information of the
module), which
corresponds to
UART_TXD of IC
12 PB20 I/O A common IO pin,
which
corresponds to PB
20 of IC
13 PB21 I/O Need to support
hardware PWM
and correspond to
PB 21 of IC
14 PA28 I/O Need to support
hardware PWM
and correspond to
PA 28 of IC
15 RXD/PB2 I/O UART0_RXD
(2)
,
which
corresponds to PB
2 of IC
16 TXD/PB1 I/O UART0_TXD
(2)
,
which
corresponds to PB
1 of IC
Note: P indicates power supply pins, I/O indicates input/output pins, and AI
indicates analog input pins. RST is only a reset pin of a module and cannot
be used for clearing information about WiFi network configuration. (1): The
pin can only be used as an ADC interface but cannot be used as a common IO
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