Published September 20, 2016

IoT- Turn on LEDs by sending email

Email to turn on LED show.

BeginnerFull instructions provided4 hours1,697

Things used in this project

Hardware components

Punch Through LightBlue Bean

Breadboard (generic)

LED (generic)

Jumper wires (generic)

Software apps and online services

Node-RED on IBM Cloud

Story

This is my Hello World program in IoT. This project turns on LED chase pattern show on breadboard when you send a email. The idea can be expanded to turn on lights at home or Christmas tree lights by sending email from anywhere.

How it works:

I have Node-RED running on my computer which constantly checks my email with a specific subject then writes a scratch to light blue bean via Bluetooth (I added a Bluetooth dongle to my PC as it has no built in Bluetooth capability). Then I uploaded a sketch to light blue bean which reads the scratch and starts the LED show.

Node-RED

I installed Node-RED on my Windows 7 PC (using Raspberry Pi for Node-Red might be easier than installing on PC).

This is the node flow:

Email Node:

Function node:

Bean write scratch node:

Code to run a chase pattern using bean under code section.

Code

LED simple chase pattern

void setup() {
pinMode(2,OUTPUT);
    pinMode(1,OUTPUT);
    pinMode(3,OUTPUT);
    pinMode(4,OUTPUT);
}

void loop() {
    if(Bean.readScratchNumber(1)==1){
        
        digitalWrite(1,HIGH);
        digitalWrite(4,LOW);
        Bean.sleep(100);
        
        digitalWrite(2,HIGH);
        digitalWrite(1,LOW);
        Bean.sleep(100);
        
        digitalWrite(3,HIGH);
        digitalWrite(2,LOW);
        Bean.sleep(100);
        
        digitalWrite(4,HIGH);
        digitalWrite(3,LOW);
        Bean.sleep(100);
        
    }else{
        digitalWrite(2,LOW);
        digitalWrite(1,LOW);
        digitalWrite(3,LOW);
        digitalWrite(4,LOW);
        
    }
    Bean.sleep(100);
}

Credits

Lavanya Kondragunta

1 project • 2 followers

Mom, Developer, Geek, Curious Learner, Sweet toothed.

IoT- Turn on LEDs by sending email

Things used in this project

Hardware components

Software apps and online services

Story

How it works:

Node-RED

Schematics

Breadboard setup

Code

LED simple chase pattern

Credits

Lavanya Kondragunta

Comments

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IoT- Turn on LEDs by sending email

IoT- Turn on LEDs by sending email

Things used in this project

Hardware components

Software apps and online services

Story

How it works:

Node-RED

Schematics

Breadboard setup

Code

LED simple chase pattern

Credits

Lavanya Kondragunta

Comments

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