E90-DTU(400SL42) 433.125MHz LoRa Data Modem RS485/RS232 — 15W, 30KM Relay Network, LBT, RSSI & Watchdog

High-power LoRa modem E90-DTU(400SL42) offering 433.125MHz wireless data transmission with RS485 and RS232 interfaces. Transmit output reaches up to 15W while supporting multi-level relay networking to extend range for ultra-long-distance links (30KM typical). Uses the latest LoRa and military-grade modulation technologies with configurable data encryption and adjustable subpacket length. Single-packet payload capacity is large — up to 240 bytes. Hardware and software watchdogs provide robust fault protection. Built-in monitoring includes dynamic environmental field-strength indication and per-packet RSSI display, plus temperature monitoring and antenna abnormality detection. Frequency stability is ensured by a temperature-compensation circuit (better than ±1PPM). Power design is simple and efficient — crimp-wire connection and support for 12V power. Rugged construction: full aluminum-alloy enclosure with compact form factor, excellent heat dissipation, dust- and moisture-resistant build, and comprehensive shielding for strong EMI immunity. All operating parameters are programmable via host software (power, frequency, air rate, address/ID, etc.). Supports LBT (listen-before-talk) to automatically defer transmissions based on ambient noise, improving success rates in noisy environments, and includes a communication key function to help prevent data interception.