Waveshare UART-WIFI232-B2 User Manual page 14

UART-WIFI232-B2 User Manual
UART request to send signal
UART sends data
GND
Pin Description
1 GND
2 VCC 3.3V@350mA
UART sends data
3
GPIO
UART receives data
4
GPIO
UART request to
send a signal
5
GPIO
UART allowed to
send signal
6
GPIO
7 Module reset
WIFI status
indications
8
GPIO
Module startup
indications
9
GPIO
Factory restore
setting
10
GPIO
UART_RTS 5
UART_TXD 3
GND 1
Network
Type
Name
GND Power
3.3V Power
UART_TXD O
GPIO3 I/O
UART_RXD I
GPIO4 I/O
UART_RTS O
GPIO5 I/O
UART_CTS I
GPIO6 I/O
RESET I
nLink O
GPIO8 I/O
nReady O
GPIO9 I/O
nReload I
GPIO10 I/O
14
6 UART_CTS UART allowed to send
signal
4 UART_RXD UART receives data
2 3.3V VCC 3.3V(350mA)
Ground
External power: 3.3V@ 350mA
Note: The GPIO port is a reserved functional
interface and is temporarily unavailable.
Low-level reset, reset time > 300ms.
When WIFI is connected, output "0";
otherwise, output "1".
After the module has completed startup, output
"0" (or heartbeat signal); otherwise, output "1".
Pins must be pulled up through a resistor
(4.7K~10K).
Input low level "0" pulled high after more than
3 seconds, module restores factory settings and
restarts.
Note
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