| Main parameter |
Performance |
Remark |
| Operating frequency | 410.125~493.125MHz | Support ISM band |
| Tx power | 22 dBm | - |
| Receiving sensitivity | -129dbm | - |
| Air data rate | 2.4k~62.5kbps | Controlled via user’s programming |
| Distance for reference | 5Km | Test condition：clear and open area, antenna gain: 5dBi，antenna height: 2.5m，air data rate: 2.4kbps |
| No. | Name | Direction | Features |
| 1 | NC | - | Empty feet |
| 2 | GND | - | Module ground wire |
| 3 | NC | - | Empty feet |
| 4 | NC | - | Empty feet |
| 5 | NC | - | Empty feet |
| 6 | NC | - | Empty feet |
| 7 | NC | - | Empty feet |
| 8 | GND | - | Module ground wire |
| 11 | GND | - | Module ground wire |
| 12 | ANT | - | antenna |
| 13 | GND | - | Module ground wire |
| 14 | GND | - | Module ground wire |
| 15 | GND | - | Module ground wire |
| 16 | GND | - | Module ground wire |
| 19 | GND | - | Module ground wire |
| 20 | M0 | Input (very weak pull-up) | Cooperate with M1 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used) |
| 21 | M1 | Input (very weak pull-up) | Cooperate with M0 to determine the 4 working modes of the module (cannot be left floating, can be grounded if not used) |
| 22 | RXD | Input | TTL serial port input, connected to the external TXD output pin; |
| 23 | TXD | output | TTL serial port output, connected to the external RXD input pin; |
| 24 | AUX | output | Used to indicate the working status of the module; |
|
| The user wakes up the external MCU and outputs low level during power-on self-test initialization; (can be left floating) |
| 25 | VCC | - | Module power supply positive reference, voltage range: 2.3~5.5V DC |
| 26 | GND | - | Module ground wire |
