[Carrier frequency]：：850.125～930.125MHz
[Transmission power]：：33dBm
[Distancia de comunicación]：: 16 km
[Tipo de interfaz]：: RS232/RS485
[Tamaño del producto]：: 82*62*25mm
[peso]：150g
[Introducción]：E90-DTU (900SL33) es una radio de transmisión de datos inalámbrica que utiliza tecnología de modulación LoRa de grado militar. Tiene múltiples métodos de transmisión. La banda de frecuencia de trabajo predeterminada es 868,125 MHz y admite entrada de voltaje de 8-28 V. El módulo tiene un algoritmo de corrección de errores directos FEC de software que puede corregir activamente los paquetes de datos interferidos, mejorando en gran medida la confiabilidad y la distancia de transmisión. La estación de radio tiene la función de encriptar datos. Los datos transmitidos por la estación de radio en el aire son aleatorios. A través del estricto algoritmo de cifrado y descifrado, la interceptación de datos no tiene sentido; admite la configuración de la longitud del subpaquete y admite diferentes paquetes de datos y en tiempo real.
Tienda oficial| Model | Frequency | Power | Distance | Specification | Recommend application scenarios |
| Hz | W | km | |||
| E90-DTU(900SL 33) | 868.125MH z | 2 | 16 | LoRa amplification of anti-interference | Suitable for distant, easily disturbed environments |
★ Note: In sunny weather, no shelter in the open environment. 12V / 2A power supply, 5 dBi suction cup antenna. the antenna is 2 meters away from the ground height, using the factory default parameters.
Frequency range and channel number
| Model | Default Frequency | Band Range | Channel Spacing | Description |
| Hz | Hz | Hz | ||
| E90-DTU(900SL33) | 868.125MHz | 850.125- 930.125MHz | IM | 81. Half duplex |
★ Note: In the same area, multiple sets of transmission stations are used to communicate one to one at the same time. It is sueeested that the channel interval be set above 2 MHz.
Transmit power level
| Model | 2W | 1W | 500m W | 250m W |
| E90-DTU(900SL33) | Factory default | √ | √ | √ |
★ Note: The lower the transmission power is, the closer the transmission distance is, but the working current will not decrease in the same proportion, so it is recommended to use the maximum transmission power.
Air rate grade
| Model | Default | Equal series | Air rate grade |
| bps | bps | ||
| E90-DTU(900SL33) | 2.4k | 6 | 2.4、4.8、9.6、19.2、38.4、62.5k |
★ Note: The higher the air speed setting, the faster the transmission rate, and the closer the transmission distance; so if the rate meets the usage requirements, the lower the air speed, the better.
Current parameters
| Model | Emission current mA | Waiting current mA | ||
| 12V | 24V | 12V | 24V | |
| E90-DTU(900SL33) | 650 | 330 | 10 | 6 |
Receiving length and subcontracting method
| Model | Cache size | Subcontracting method |
| E90-DTU(900SL33) | 1000 Bytes | Can be sent by instruction subcontracting 32 / 64 / 128 / 240 bytes |
★ Note: 1. If the single data received by the radio station is greater than the single package capacity, the excess part of the data will be automatically allocated to the second transmission until the transmission is completed;
2. The single received data should not be greater than the cache capacity.