UART serial port, 8N1, 8E1, 8O1, from 1200 to 115200
15
Driving means
UART serial port can be set to push-pull / pull-up, open-drain
16
Transmitting length
Internal ring FIFO cache 256 bytes
17
Receiving length
Internal ring FIFO cache 256 bytes
18
Module address
65536 configurable addresses
19
RSSI support
Built-in intelligent processing
20
Receiving sensitivity
-130dbm at 2.4Kbps
21
Antenna type
SMA antenna / spring antenna
22
Operation temperature
-40°C to +85°C
23
Operation humidity
10%-90% relative humidity, no condensation
24
Storage temperature
-40°C to +125°C
Pin Specification
Pin No.
Name
Pin Direction
Pin Application
1
MD0
Input (very weak pull up)
Cooperates with MD1 to decide 4 kinds of work modes, which cannot be floated
2
MD1
Input (very weak pull up)
Cooperates with MD0 to decide 4 kinds of work modes, cannot be floated
3
RDX
Input
TTL UART inputs, connected to the external TXD output pin. It can be configured as open-drain or pull-up input, see parameter setting
4
TXD
Output
TTL UART outputs, connected to the external RXD input pin. It can be configured as open-drain or pull-up output, see parameter setting
5
AUX
Output
Used to indicate the working status of the module, the user wakes up the external MCU; during the initial power-on self-test period, it outputs low. It can be configured as an open-drain output, or push-pull output, see parameter settings
6
VCC
Power Input
Power input, power supply 2.5-5.5V (Note: if it is less than 4.5V, the output power will decline, but the impact on the reception performance is very small.)
7
GND
Ground
Ground line, connected to the power supply reference ground.