EWM22M-T22S Series Product Introduction

EWM22M-xxxT22S is an ultra-small, low-cost wireless UART module with multiple transmission modes. It adopts LoRa communication technology fully compatible and interoperable with E22, featuring a maximum transmit power of 22dBm and operating in the 400MHz or 900MHz frequency bands. Utilizing LoRa spread spectrum technology, it provides TTL level output and is compatible with 3.3V IO port voltage.EWM22M-T22S series LoRa modules include: EWM22M-400T22S, EWM22M-900T22S

EWM22M-xxxT22S offers faster speed, lower power consumption, and smaller size. It supports functions such as over-the-air wake-up, wireless configuration, channel monitoring, automatic relay networking, and communication encryption. It also allows setting of packet length and provides customized development services.

Features and Functions

  • Adopts the new generation LoRa spread spectrum modulation technology, enabling longer communication distance and stronger anti-interference capability;

  • Supports UART firmware upgrade for convenient firmware updates;

  • Supports AT commands for user-friendly operation;

  • Supports automatic relay networking with multi-level relays suitable for ultra-long-distance communication, allowing multiple networks to operate simultaneously in the same area;

  • Allows users to set their own communication keys, which cannot be read, greatly enhancing data confidentiality;

  • Supports LBT (Listen-Before-Talk) function, which monitors channel noise before transmission, significantly improving communication success rate in harsh environments;

  • Supports RSSI signal strength indication for evaluating signal quality, optimizing communication networks, and ranging;

  • Supports wireless parameter configuration, enabling remote configuration or reading of wireless module parameters via wireless command data packets;

  • Supports over-the-air wake-up (ultra-low power consumption function), suitable for battery-powered applications;

  • Supports fixed-point transmission, broadcast transmission, and channel monitoring;

  • Supports deep sleep mode with an overall power consumption of approximately 3uA;

  • Communication distance up to 5km under ideal conditions;

  • Parameter power-off retention, ensuring the module operates with pre-set parameters after re-powering;

  • Efficient watchdog design, which automatically restarts the module in case of abnormalities and resumes operation with previous parameter settings;

  • EWM22M-400T22S and EWM22M-900T22S support data transmission rates of 2.4K～62.5Kbps;

  • Supports 2.7～5.5V power supply, with ≥5V ensuring optimal performance;

  • Industrial-grade design, supporting long-term operation at -40～+85℃;

  • Maximum module power up to 160mW (22dBm), enabling farther and more stable transmission.

Application Scenarios

  • Home security alarm and remote keyless entry;

  • Smart home and industrial sensors;

  • Wireless alarm security systems;

  • Building automation solutions;

  • Wireless industrial-grade remote controls;

  • Healthcare products;

  • Advanced Metering Infrastructure (AMI).