[Frequency]：900~931MHz
[Power]：1W
[Distance]：8km
[Interface]：RS232/RS485
[Weight]：128±5g
[Introduction]：Based on SX1276 chip from SEMTECH, E44-DTU-1W with RS232/RS485 interface, 8V~28V, operating at 900~931MHz features LoRa spread spectrum. It features LoRa long range transmission and effective FEC. Transparent transmission is available. It supports data encryption & compression.
| RF Parameter | Value | Remark |
|---|---|---|
| Working frequency band | 900 MHz to 931 MHz | Default value is 915MHz |
| Transmit power | 30 dBm maximum power | About 1W |
| Receiving sensitivity | -147dbm | Airspeed 2.4 KBPS |
| Air rate | 0.3K to 19.2kbps factory | Default 2.4 KBPS |
| Measured distance | 8 km | Clear and open environment, maximum power, antenna gain 5dBi, height 2m, airspeed 2.4 KBPS |
| Hardware Parameter | Value | Remark |
|---|---|---|
| Ssize | 82 * 62 * 25 mm | |
| Antenna type | SMA-K | |
| Communication interface | RS232/RS485 | Baud rate ranges from 1200 to 115200, and the factory default is 9600 |
| Package | DB-9/ Screwing cable | Standard DB9 hole /3.81 terminal |
| Buffer | 512 bytes buffer | Automaticlly sub-packaging with 58 bytes per package |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
|---|---|---|---|---|---|
| Power supply | 10 | 12 | 28 | V | |
| Transmitting current | 621 | 693 | 762 | mA | 30dBm（1W） |
| stand-by current | 36 | 40 | 44 | mA | |
| Operating temperature | -40 | 20 | +85 | ℃ | |
| Operating humidity | 10 | 60 | 90 | % | |
| Storage temperature | -40 | 20 | +125 | ℃ |
| Pin No. | Name | Function | Description |
|---|---|---|---|
| 1 | DB-9 female connector | RS-232 connector | Standard RS-232 connector |
| 2 | 3.81 wiring connector | RS-485, power connector | Standard RS-485 connector and line-pressing power source connector |
| 3 | PWR-LED | Power source indicator | Red, light on when power on |
| 4 | TXD-LED | TX indicator | Yellow, flicker when transmitting data |
| 5 | RXD-LED | RX indicator | Yellow, flicker when receiving data |
| 6 | DC power connecto | Power source connector | Drop-in round hole, 5.5mm external diameter, 2.5mm internal diameter |
| 7 | Toggle switch | Toggle switch | Operation mode control |
| 8 | Antenna interface | SMA-K connector | External screw and inner hole, 10mm long, 50Ω characteristic impedance |
