Grove Relay

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

3.3V~5V

Operating Current

60mA

100mA

Relay Life

100,000 Cycle

Max Switching Voltage

250VAC/30VDC

Max Switching Current

!!!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

Base Shield

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.

!!!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

VCC

SIG

Grove-Button#1

Arduino

GND

VCC

SIG

Grove-Button#2

Arduino

GND

VCC

SIG

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)

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

Grovepi+

Follow instruction to configure the development environment.
Plug Grove-Button to D3 port of Grovepi+.
Plug Grove-Relay to D4 port of Grovepi+.

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"