| Main parameter |
Performance |
Remark |
| Operating frequency | 850.125~930.125MHz | Support ISM band |
| Tx power | 30 dBm | - |
| Receiving sensitivity | -129dbm | Air data rate:2.4kbps |
| Air data rate | 2.4k~62.5kbps | Controlled via user’s programming |
| Distance for reference | 10Km | Test condition：clear and open area, antenna gain: 5dBi，antenna height:2.5m，air data rate: 2.4kbps |
No.
| Name
| Direction
| Function
|
| 1 | GND
| input | Module ground wire
|
| 2 | VCC | input
| Positive reference for module power supply, voltage range: 3.3～5.5V DC
|
| 3 | AUX | output |
Used
to indicate the working status of the module; the user wakes up the
external MCU, and the output is low during the power-on self-test
initialization ; (can be floating) |
| 4 | TXD | output |
TTL serial output, connected to an external RXD input pin； |
| 5 | RXD | input
|
TTL serial input, connected to an external TXD output pin； |
| 6 | M1 | Input (very weak pull-up) | Cooperate with M0 to determine the 4 operating modes of the module (not floating, if not used, it can be grounded)
|
| 7 | M0 | Input (very weak pull-up) | Cooperate with M1 to determine the 4 operating modes of the module (not floating, if not used, it can be grounded) |
| 11 | ANT | output | Antenna interface (high frequency signal output, 50 ohm characteristic impedance) |
| 12 | GND |
| Fixed ground |
| 13 | GND |
| Fixed ground
|
| 14 | GND |
| Fixed ground
|
| 18 | NC | Input/output | NC pin, this pin needs to be floating (for subsequent expansion)
|
| 19 | NC | Input/output
| NC pin, this pin needs to be floating (for subsequent expansion)
|
| 20 | NC | Input/output | NC pin, this pin needs to be floating (for subsequent expansion)
|
| 21 | NC | input | (The user does not need to connect, it is floating)
|
| 22 | NC | input | (Floating, the user does not need to connect)
|
| 23 | GND | input | Fixed ground
|
| 24 | NC | input | (Floating, the user does not need to connect) |
