Chengdu Ebyte Electronic Technology Co.,Ltd.
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
5
Dimensions
26*16mm
Antenna interface
IPEX/ Stamp hole
Equivalent impedance is about 50 ohms
Ⅲ Dimensions and Pin Definitions
Pin
number
Pin
name
Pin Orientation
Pin Usage
1
GND
Input
Module ground
2
VCC
Input
DC Module power positive reference, voltage range: 3.3 ~ 5.5V DC
3
AUX
Output
Used to indicate the working state of the module; the user wakes up the external MCU, and outputs a low level
during the power-on self-test initialization; (can be left floating)
4
TXD
Output
TTL serial output, connected to external RXD input pin;
5
RXD
Input
TTL serial port input, connected to the external TXD output pin;
6
M1
Input (very weak
pull-up)
Cooperate with M0 to determine the 4 working modes of the module (can not be suspended, if not used, it
can be grounded)
7
M0
Input (very weak
pull-up)
Cooperate with M1 to determine the 4 working modes of the module (can not be suspended, if not used, it
can be grounded)
11
ANT
Output
Antenna interface (high frequency signal output, 50 ohm characteristic impedance)
12
GND
Fixedly
13
GND
Fixedly
14
GND
Fixedly
18
NC
Input/Output
NC pin, this pin needs to be left floating (for subsequent expansion)
19
NC
Input/Output
NC pin, this pin needs to be left floating (for subsequent expansion)
