The WS8901D44 is a LoRa wireless data transmission radio designed and produced by Silent Smart Technology Co., Ltd. Its internal power amplifier ( PA) and low-noise amplifier ( LNA) improve transmit power and receive sensitivity, extending the communication range far beyond that of low-power 30 dBm radios. It supports an industrial-grade RS485 communication interface and features multiple protections, including reverse connection protection, overconnection protection, lightning protection, and surge protection, enhancing the radio's adaptability to complex environments.
The WS8901D44's parameters can be configured via AT commands, facilitating its use in various application scenarios. LoRa's direct-sequence spread spectrum technology, due to its decentralized power density, offers greater range and improved anti-interference capabilities.
Supports license-free ISM 433MHz band, supports 470MHz meter reading band
Supports LoRa modulation
Sensitivity up to -148dBm at low airspeed and transmit power up to 44dBm (25W) with LoRa modulation.
Supports up to 62.5kbps airspeed with LoRa modulation.
Support RS485, RS232, stable, reliable and adaptable.
Multiple protections such as power supply anti-reverse connection, power supply over-voltage protection, interface lightning strike and surge protection, etc.
All aluminum alloy pressure plate mode, good heat dissipation, perfect shielding design, good electromagnetic compatibility, strong anti-interference ability.
Temperature monitoring, antenna abnormality monitoring
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