[Fréquence porteuse]：850,125 ~ 930,125 MHz
[Puissance de transmission]：33 dBm
[Distance de communication]：16 km
[Type d'interface]：RS232/RS485
[Taille du produit]：82*62*25mm
[Poids du produit]：150g
[Introduction]：E90-DTU (900SL33) est une radio de transmission de données sans fil utilisant la technologie de modulation LoRa de qualité militaire. Il dispose de plusieurs méthodes de transmission. La bande de fréquence de travail par défaut est de 868,125 MHz et prend en charge une entrée de tension de 8 à 28 V. Le module dispose d'un algorithme logiciel de correction d'erreur directe FEC qui peut corriger activement les paquets de données interférés, améliorant considérablement la fiabilité et la distance de transmission. La station de radio a la fonction de cryptage des données. Les données transmises par la station radio dans les airs sont aléatoires. Grâce à l'algorithme strict de cryptage et de décryptage, l'interception des données n'a aucun sens ; il prend en charge le réglage de la longueur des sous-paquets et prend en charge différents paquets de données et en temps réel.
Magasin officiel| 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.