User's Manual

HF-A11x V3.1 User Manual
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
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1.2. Hardware Introduction
Figure 1. HF-A11x Demo
1.2.1. Pins Definition
Figure 2. HF-A11x Pins Map
Table 2 HF-A11x Pins Definition
Pin Description Name Directio
n
Note
1
Ground GND Power
2
VCC 3.3V Power 3.3V @ 350mA power input
UART Data Transmit UART_TXD O
3
GPIO GPIO3 I/O
UART Data Receive UART_RX
D
I
4
GPIO GPIO4 I/O
UART sends request of
data transmission
UART_RTS O
5
GPIO GPIO5 I/O
If not use UART function，this 4
pins can be configured as GPIO
pins, and can change GPIO pin
status through AT command