iot module

 Just got your E91-DTU(xxxSL30) radio? This article walks you through point-to-point transparent transmission setup in just 5 steps. Step 1: Hardware Connection Connect the M12 5-pin waterproof cable for power and RS485 signals. Red wire to VCC (DC 8–28 V), black to GND, yellow to RS485-A, white to RS485-B, green to PE (earth ground). Screw the antenna onto the SMA-K connector. Step 2: Enter Configuration Mode Using a serial terminal (baud rate 9600, 8N1), send AT commands. First, confirm the module is in configuration mode: send AT+MODE=2 . You should receive =OK . Step 3: Configure Basic Parameters Check default parameters: AT+ADDR=? for address (default 0), AT+CHANNEL=? for channel (400SL30 default 0x17, i.e., 433.125 MHz), AT+UART=? for serial settings (default 9600, 8N1). Ensure both modules have the same NETID and channel: AT+NETID=0 . Step 4: Switch to Transparent Mode Send AT+TRANS=0 to set transparent transmission mode. Then send AT+MODE=0 to switch to tra...

In industrial IoT scenarios, equipment often needs to operate reliably outdoors under harsh conditions. Ebyte's latest E91-DTU(xxxSL30) series LoRa wireless data radios are designed precisely for this purpose. This series includes the E91-DTU(400SL30) (410–493 MHz) and E91-DTU(900SL30) (850–930 MHz) frequency variants, with a transmit power of up to 30 dBm (1000 mW). In open areas, the tested communication distance reaches 8 km. Utilizing SEMTECH's latest generation LoRa spread-spectrum modulation technology, the receiver sensitivity is as low as -132 dBm, offering excellent anti-interference capability. What impresses most is its industrial-grade protection design. The housing is made of PC flame-retardant material, internally potted with resin and sealed with a silicone O-ring, achieving an IP67 waterproof rating—capable of full immersion. The supply voltage ranges from 8–28 V DC, supporting both power adapters and direct wiring. The operating temperature rang...

Choosing the right communication solution is critical in industrial data acquisition and remote control. This article compares the E91-DTU(xxxSL30) LoRa radio with traditional RS485 wired solutions. Communication Distance LoRa achieves up to 8 km in open areas, extendable via multi-level relay. RS485 wired standard distance is about 1200 meters (at 9600 bps), requiring repeaters beyond that. LoRa holds a decisive advantage in long-range scenarios. Installation Cost RS485 requires cable laying—costly and difficult to maintain when crossing rivers, roads, or large farmland areas. LoRa eliminates cabling entirely; a single E91-DTU(xxxSL30) can replace kilometers of cable, drastically reducing deployment costs. Protection and Reliability The E91-DTU(xxxSL30) features IP67 waterproofing for outdoor immersion operation, -40°C to +85°C temperature range, and built-in reverse polarity, overcurrent, and antenna surge protection. Wired solutions in outdoor environments suffer fr...