Grove Relay

enter image description here

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
Get ONE Now	Get ONE Now	Get ONE Now	Get ONE Now

• 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	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)

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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+
Get ONE Now	Get ONE Now	Get ONE Now	Get ONE Now

• 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"

• 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

• [Eagle] Grove - Relay Schematic and PCB in Eagle format
• [PDF] Grove - Relay PCB in PDF format
• [PDF] Grove - Relay Schematic in PDF format
• [Datasheet] HLS8-T73 Series Relay Datasheet