Design sketch
Dimensions
ME25LS04 is based on Semtech's third-generation LoRa wireless transceiver LR1121, supporting global ISM Sub-GHz and 2.4 GHz frequency bands as well as S-band satellite connectivity. It is an ultra-low-power, long-range, compact LoRa® transceiver module with an easy-to-use SPI interface.
In receive mode, the current consumption is only 12 mA. With an integrated high-efficiency power amplifier, the module delivers up to +22 dBm output power in LoRa mode and provides enhanced receiver sensitivity down to –126 dBm. It complies with the physical layer requirements of the LoRaWAN® standard and also supports LoRa® point-to-point (P2P) communication. In addition, it supports Long-Range Frequency Hopping Spread Spectrum (LR-FHSS) transmission, enabling customers to rapidly deploy private long-range LoRa® networks, standard LoRaWAN® communication, and satellite communication.
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Chip Model | LR1121 | Antenna | 2.4G: PCB /U.FL Sub-GHz: ANT PIN |
Module Size | 25x16.8x3.6mm | GPIO | 2 |
Receiving Sensitivity | LoRa:-126dBm @SF7 | Transmission Power | LoRa: +22dBm 2.4G/S-band: +11.5dBm |
Current(TX) | 118mA (maximum) | Current(RX) | 12mA (Long receiving mode) |
Electrical Specification
Parameter | Value | Notes |
Operating Voltage | 1.8V-3.7V | Standard power supply voltage 3.3V |
Operating Temperature | -40℃~+85℃ | |
Operating Frequency | 150MHz - 960MHz 2.4GHz | SubGHz optional frequency bands, Default set is 868MHz/915MHz 2.4G: PCB antenna is used by default. If you need U.FL, please contact sales. |
Transmission Power | SubGHz: +22dBm 2.4G/S-band: +11.5dBm | Configurable |
Current(RX) | 12mA | Receiving mode maximum (long receiving mode) |
Current(TX) | 118mA | TX mode maximum |
Module Dimensions | 25*16.8*3.6mm | |
Quantity of IO Port | 2 | DIO7, DIO8 |
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