RM95 LoRa 868MHz Band Wireless Module

The RM95 module is a wireless communication device based on the LoRa (™) wireless specification. LoRa devices sacrifice data rate for low power and an exceptionally longer range of up to several kilometers. This makes these modules ideal for remote sensor applications where the range of other wireless technologies such as WiFi, Bluetooth etc. are insufficient. LoRa devices can pick up very weak signals because of how sensitive they are, and their spread-spectrum technology means that they don’t get easily disrupted by other electrical signals.

Arduino users:
To interface a microcontroller, the module has a serial SPI interface and for Arduino users we have written a simple library with a very low memory footprint that makes it easy to send sensor readings or text from one module to another. See this post for example sketches and link to our HCRM95 library.

Optional breakout board:
If you are purchasing the module to use in this way, then please consider purchasing our RM95 breakout board that brings the module pads out to standard 0.1” pitch pin headers. See SKU: HCPROT0104

Please note: RM95 modules are a higher frequency variant of the RM96. As such, they are fitted with an IC marked RM96 which operates at the higher 868MHz frequency band.

Key Features:
LoRa(TM) Modem.
Supply voltage: 1.8 to 3.7V
Frequency Band: 868MHz
168 dB maximum link budget.
+20 dBm - 100 mW constant RF output vs. V supply.
+14 dBm high efficiency PA.
Programmable bit rate up to 300 kbps.
High sensitivity: down to -148 dBm.
Bullet-proof front end: IIP3 = -12.5 dBm.
Excellent blocking immunity.
Low RX current of 10.3 mA, 200 nA register retention.
Fully integrated synthesiser with a resolution of 61 Hz.
FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
Built-in bit synchronizer for clock recovery.
Preamble detection.
127 dB Dynamic Range RSSI.
Automatic RF Sense and CAD with ultra-fast AFC.
Packet engine up to 256 bytes with CRC.
Built-in temperature sensor and low battery indicator.
Module Size：16*16mm

Images shows module mounted on the RM95 breakout board (HCPROT0104) and connected to a 3.3V Pro Micro (HCDVBD0024).

* Please see the documentation of your Arduino for correct SPI MOSI/MISO/SCK pins as these vary depending on the module of Arduino board.

Please see our support forum for example Arduino sketches, library downloaded link and datasheet.