| RF Parameter |
Value |
Remark |
| Working frequency | 220.125~236.125 MHz | Support ISM band |
| Transmitting power | 30 dBm | Max. Power (1W) |
| Receiving sensitivity | -148 dBm | Air data rate is 2.4kbps |
| Air data rate | 0.3k~15.6kbps | Controlled via user's programming |
| Test distance | 10000m | Test condition: clear and open area, antenna gain: 5 dBi, antenna height: 2.5m, air data rate: 2.4k bps |
No.
| Name
| Direction
| Function
|
| 1 | GND
| -
| Module ground |
| 2 | VCC | -
| Module power supply positive reference，Power supply：3.3～5.5V DC |
| 3 | AUX | Output |
The user wakes up the external MCU and outputs low level during power on self-test initialization; (can be suspended) |
| 4 | TXD | Output
|
TTL UART outputs, connects to external (MCU, PC) RXD input pin.
|
| 5 | RXD | Input | TTL UART inputs, connects to external (MCU, PC) RXD output pin. |
| 6 | M1 | Input（weak pull-up） |
Work with M0 to decide 4 working modes of module (not suspended, if not used, could be grounded).）
|
| 7 | M0 | Input（weak pull-up） | Work with M1 to decide 4 working modes of module (not suspended, if not used, could be grounded).
|
| 11 | ANT | Output |
Antenna(high frequency signal output，50 ohm）
|
| 12 | GND | -
| Ground |
| 13 | GND | -
| Ground
|
| 14 | GND | -
| Ground
|
| 18 | NC | - | Empty |
| 19 | NC | -
| Empty
|
| 20 | NC | - | Empty
|
| 21 | NC | - | Empty |
| 22 | RESET | Input | Reset pin when program is loaded (suspended, user does not need to connect)
|
| 23 | GND | Input | Ground pin when program is loaded (suspended, user does not need to connect)
|
| 24 | NC | - | Empty |
