Arduino HM-11 User Manual page 2

Electrical Characteristics
Specification
Max Input Voltage
Working Input Voltage
Transmit Current
Receive Current
Deep Sleep Current
Operating Temperature
Pin definition
Pin
1 UART_RTS
2 UART_TX
3 UART_CTS
4 UART_RX
5 NC
6 NC
7 NV
8 NV
9 VCC
10 NC
11 RESETB
12 GND
13 PIO3
14 PIO2
15 PIO1
16 PIO0
AT commands & Configuration
1） Query the native MAC address
Send: AT + ADDR?
Send after a successful return: OK + LADD: MAC address (address for 12 string)
-0.3
2.0
-40
Name
UART
UART
UART
UART
Power supply 3.3V
Reset, active low at least in 5ms
GND
IO port, used for connect to DHT11/DS18B20
Digital input, output
LED indicator
Button pin
Min Typ
3.3
15
8.5
600
Description
Max
3.6 V
3.6 V
mA
mA
uA
+65 °C
Unit