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  1. Grove Ecosystem
  2. Grove Modules
  3. Communication

Grove LoRa Radio

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Last updated 5 years ago

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Grove is a very powerful platform developed by Seeed Studio to simplify your IoT projects.We have integrated the grove connector to most boards produced by Seeed 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 433MHz is RFM98, which is a transceiver 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 433MHz 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 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 which has MHF interface to gain more signal.

This is the 433MHz version, which can be used for 433MHz communication. You can also find the version for 868MHz at Grove - LoRa Radio 868MHz.

Version

Released Date

How to Buy

Grove - LoRa Radio 433 MHz

Dec 10, 2016

Grove - LoRa Radio 868 MHz

Dec 10, 2016

Features

  • Using RFM95 module based on SX1276 LoRa®

  • Working Voltage:5V/3.3V

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

  • ~8.4mA(Avg)@standby mode

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

  • Working Temperature:-20 – 70℃

  • Interface:Grove - UART(RX,TX,VCC,GND)

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

  • Working Frequency:868MHz/433MHz

  • +20dBm 100 mW Power Output Capability

  • Size:20*40mm

  • Rate:0.3kps~50kps

  • Ready-to-go Arduino libraries

  • Resered MHF antenna connector

Platforms Supported

Hardware Overview

  1. MHF Connector

  2. Wire Antenna

  3. Grove Interface

PIN

NAME

FUNCTION

1

TX

TX of UART

2

RX

RX of UART

3

VCC

Power supply, 3.3V or 5V

4

GND

Connect Ground

Application Ideas

  • Internet of Things

  • Smart Home

  • Sensor Hub

  • Long distance wireless communication

Getting Started

After this section, you can make Grove - LoRa Radio run with only few steps.

Preparations

Now we are making a demo for P2P(point to point) communication with the Grove - Lora Radio 433MHz, the Grove - LoRa Radio 868MHz is the same way to use.

!!!Tip Grove - LoRa Radio 433MHz can't talk to Grove - LoRa Radio 868MHz.

Item

Qty

Link

Seeeduino Lotus

2

Grove - LoRa Radio 433MHz

2

Micro USB Cable

2

Seeeduino Lotus is fully compatible with Arduino which works as simple as Arduino.

Connecting hardware

Download Library

Open the example

Open your Arduino IDE, click File > Examples>Grove_LoRa_433MHz_and_915MHz_RF-master you will get many examples for the module.

Node

Example Name

Function

Sender

rf95_client

Send "Hello World" every 1s

Receiver

rf95_server

Receive data and print it

Click Tools>Board to choose "Seeeduino Lotus" and select respective serial port then click on Upload button to finish the steps.

!!!Tip If you're using Grove - LoRa Radio 868MHz module change the following code.

//rf95.setFrequency(434.0);
rf95.setFrequency(868.0);

Review Results

After upload completed, you can open the serial monitor to see the result.

Data Rate

The below chart shows the relationships between the band rate signal band width spreding factor and sensitivity.

Resources

  • Schematics

  • Datasheet

  • References

  • Library

!!!Tip More details about Grove modules please refer to

ATMega168 MCU ()

RFM95 Module ()

If this is your first time using , please refer to .

If this is your first time using Arduino, Please put hand on to start your Arduino journey.

is a combination of Seeeduino and Base Shield. We can connect the LoRa Radio module to the D5 socket directly as the below picture shows.

enter image description here

Click to download the library and install it ()

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Grove System
datasheet
datesheet
Seeeduino Lotus
Seeeduino Lotus's wiki
here
Seeeduino Lotus
How to install an Arduino Library
Grove - LoRa Radio 433MHz v1.0 Schematics (Eagle files)
Grove - LoRa Radio 433MHz v1.0 Schematics (PDF files)
Grove - LoRa Radio 868MHz v1.0 Schematics (Eagle files)
Grove - LoRa Radio 868MHz v1.0 Schematics (PDF files)
RFM95/96/97 Datasheet
Atmega168 Datasheet
LoRa Alliance
Grove - LoRa Radio Library and Examples
Download ALL Above
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