USR IOT USR-WIFI232-A2, Hardware Manual, Page: 4 / 9

USR-WIFI232-
A
2 Hardware Manual www.usriot.com
Jinan USR IOT Technology Limited 4 / 9 h.usriot.com
1.3. Pin Defination
PIN Name Signal Type Defination
1 GND P Power Ground
2 VCC P 3.3V @ 350mA power input
3 UART_TXD O If don
’t use UART function, this four pins can be
configured as GPIO pins, and can change GPIO pin
status through AT command.
GPIO3 I/O
4 UART_RXD I
GPIO4 I/O
5 UART_RTS O
GPIO5 I/O
6 UART_CTS I
GPIO6 I/O
7 RESET I Take effect in low level.
8 nLink O Output high level: WIFI connection available.
Output low level: WIFI connection not available.
Can be configured as GPIO.
GPIO8 I/O
9 nReady O After module starting, output high level or heartbeat
signal.
Can be configured as GPIO.
GPIO9 I/O
10 nReload I Take effect in low level. Press over 3s restore factory
settings.
GPIO10 I/O
11 I Ethernet Input+
12 PHY_RX- I Ethernet Input-
13 O Ethernet
14 PHY_TX- O Ethernet Output-