Grove - LoRa Radio 868MHz

Grove is a very powerful platform developed by Seeed Studio to simplify your IoT projects. Seeed has integrated the grove connector to most boards they produce to make them become a system. This time, we combined Grove with LoRa to provide an ultra-long-range wireless module for you. The main functional module in Grove - LoRa Radio 868MHz is RFM95, which is a transceiver that features the LoRa long range modem that provides ultra-long range spread spectrum communication and high interference immunity whilst mini-missing current consumption. The heart of Grove - LoRa Radio 868MHz is ATmega168, a widely used chip with very high-performance and low power consumption, especially suitable for this grove module. There we already integrated a simple wire antenna to receive the signal, if the signal is too weak to receive, don’t worry, the MHF connector next to the antenna is for adding a second antenna that has MHF interface to gain more signal. This is the 868MHz version, which can be used for 868MHz communication.

Features

* Using RFM95 module based on SX1276 LoRa®

* Inputting voltage: 5V/3.3V

* ~28mA(Avg) @+20dBm continuous transmit

* ~8.4mA(Avg)@standby mode

* ~20mA(Avg) @receive mode, BW-500kHz

* Working Temperature: -20 – 70

* Communication Interface: UART

* Simple wire antenna or MHF Connector for external high gain antenna

* Working Frequency: 868MHz

* +20dBm - 100 mW Power Output Capability

* Size: 20mm x 40mm

* Product number: Seeed 113060006

Resources

* Product Wiki

* Library & Examples

* LMIC Library

* RFM95/96/97 Datasheet

* Atmega168 Datasheet

* Schematic (PDF)

Note

* Please keep the antenna vertical to the board and as straight as possible to make the best performance.

* Please avoid making any big metal object near the antenna and a metal cape is also not recommended if you need to add a cape for your device.