Grove - Relay

Introduction

5.0V

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The Grove-Relay module is a digital normally-open switch. Through it, you can control circuit of high voltage with low voltage, say 5V on the controller. There is an indicator LED on the board, which will light up when the controlled terminals get closed.

Specifications

Parameter V1.1 V1.2
Product Release Date 27th Jan 2013 9th June 2014
Operating Voltage 5V 3.3V~5V
Operating Current 60mA 100mA
Relay Life 100,000 Cycle 100,000 Cycle
Max Switching Voltage 250VAC/30VDC 250VAC/30VDC
Max Switching Current 5A 5A

Tip

More details about Grove modules please refer to Grove System

Platforms Supported

Getting Started

With Arduino

Connection

Here we will show you how this Grove - Relay works via a simple demo. First of all, you need to prepare the below stuffs:

Seeeduino V4 Grove - RTC Grove - RTC Base Shield
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  • Connect Grove-Relay module to the Digital 4 port of Grove- Base Shield.
  • Connect Grove-Button module to the Digital 2 & 3 ports of Grove- Base Shield.
  • Plug Grove- Base Shield into Arduino.
  • Connect Arduino to PC via a USB cable. enter image description here

Note

If we don’t have the base shield, we also can directly connect the Grove-Relay and Grove-Button to Arduino board. Please follow below connection.

Grove-Relay Arduino
GND GND
VCC 5V
SIG D4
Grove-Button#1 Arduino
GND GND
VCC 5V
SIG D2
Grove-Button#2 Arduino
GND GND
VCC 5V
SIG D3

Software

Below is a demo that shows you how to control a Grove - Relay with a Grove - Button. When one button gets pressed, the relay will close. When the other button gets pressed, the relay will open.

// Relay Control

void setup()
{
  pinMode(2, INPUT);
  pinMode(3, INPUT);
  pinMode(4, OUTPUT);
}

void loop()
{
  if (digitalRead(2)==HIGH)
  {
    digitalWrite(4, HIGH);
    delay(100);
  }
  if (digitalRead(3)==HIGH)
  {
    digitalWrite(4, LOW);
  }
}

With TI LaunchPad

Controlling other electronics (Relay)

enter image description here

This example shows how to use the Grove-relay module to control larger load, i.e. a desk lamp light. A 3V voltage signal can cause the relay to switch on, allowing current to flow through the connected appliance.

/*
Relay
The basic Energia example.
This example code is in the public domain.
*/

#define RELAY_PIN 39

// the setup routine runs once when you press reset:
void setup() {
         pinMode(RELAY_PIN, OUTPUT); // initialize the digital pin as an output.
}

// the loop routine runs over and over again forever:
void loop() {
         digitalWrite(RELAY_PIN, HIGH); // turn the relay on (HIGH is the voltage level)
         delay(1000);   // wait for a second
         digitalWrite(RELAY_PIN, LOW);   // turn the relay o by making the voltage LOW
         delay(1000);   // wait for a second
}

With Raspberry Pi

Connection

  • First, We need to prepare the below stuffs:
Raspberry pi Grove - Relay Grove - Button
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  • Follow instruction to configure the development environment.
  • Plug Grove-Button to D3 port of Grovepi+.
  • Plug Grove-Relay to D4 port of Grovepi+. enter image description here

Software

This demo shows you how to use Grove - Relay by Raspberry Pi .

# Raspberry Pi + Grove Switch + Grove Relay

import time
import grovepi
# Connect the Grove Switch to digital port D3
# SIG,NC,VCC,GND

switch = 3
# Connect the Grove Relay to digital port D4
# SIG,NC,VCC,GND

relay = 4
grovepi.pinMode(switch,"INPUT")
grovepi.pinMode(relay,"OUTPUT")
while True:
    try:
        if grovepi.digitalRead(switch):
            grovepi.digitalWrite(relay,1)
        else:
            grovepi.digitalWrite(relay,0)
            time.sleep(.05)
    except KeyboardInterrupt:
        grovepi.digitalWrite(relay,0)
        break
    except IOError:
        print "Error"
  • Find the path to the file(According to your own path)
cd GrovePi/Software/Python/
  • Run the Program
sudo python grove_switch_relay.py

Resources


ArduinoWioBeagleBoneRaspberry PiLinkIt ONE

Caution

The platforms mentioned above as supported is/are an indication of the module's hardware or theoritical compatibility. We only provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library / demo code for all possible MCU platforms. Hence, users have to write their own software library.

Techsupport

For any technical issue, you are most welcome to contact techsupport@seeed.cc, our techsupport engineers will help you. Thank you!

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