Publish Temperature, Humidity to Twitter using Rasp Pi, NodeRed

Hi,

This is continuation of the posts :

1. Getting started with Raspberry Pi using DHT11 Temperature and Humidity Sensor :

 https://johnsylvester-johnsylvester.blogspot.com/2018/07/getting-started-with-raspberry-pi-dht11.html

2. Publish  Temperature and Humidity to Telegram :

https://johnsylvester-johnsylvester.blogspot.com/2018/07/publish-temperature-humidity-to.html


If you have not completed above two , complete it and then continue this post.

Lets see how to publish the temperature & humidity to Twitter using Raspberry Pi 3 B+

I. Twitter Setup 

a) Login into your twitter account to https://apps.twitter.com

b) Create a new Twitter Application as follows:

 Note down the Consumer Key , Consumer Secret

b) Click "Create my access token "  and generate Access token  , Access Token Secret and note it down.

II. Node Flow Setup 


a)  Get the Node Red flow from "Publish  Temperature and Humidity to Telegram Post :
https://johnsylvester-johnsylvester.blogspot.com/2018/07/publish-temperature-humidity-to.html"

b) Drag and drop "twitter out" from the left palette and complete the Node Red Flow diagram

c) Configure the twitter out node as follows :

1) Click the edit icon 

2) Provide the Consumer Key , Secret , Access Token and Access secret  and click "Done".
 

III. Deploy and test the flow :

Now , you have successfully got the temperature & humidity from DHT11 Sensor published to twitter.

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Detecting Big & Small Sound using Sound Sensor , Raspberry Pi, Python

Hi,

 I like to share my experience connecting Raspberry Pi , Big & Small Sound Sensor using Python.


Note :
You can use the same circuit , python program for both big and small sound sensors. The process is same for both the sensors 

I.Things Needed :

 1. Raspberry Pi 3 Model B+

 2.  a) Big Sound Sensor

      b) Small Sound Sensor  - KES200

                                   

 3. 3 Female to Female Jumper wires.

II.  Circuit Completion

a) Complete  the circuit has shown below .  

b) When you connect for the first time, you will see two red lights burning

c) Take a screw driver and adjust the screw so that only one light burns and when you knock near the sensor,  second light should blink ( it means sound is detected ).

II.Python Program 

a) Open a Text Editor and give the following program and save it as sound.py :

Python File : 

https://gist.github.com/johnsylvester1/ddf2bd28324e77d6ec0366fb52a012cb

IV. Executing Python program 

a) Open the Terminal using VNC Viewer or Putty / MobaXterm and  give the command

     python sound.py

Big Sound Sensor :

 Now knock near the big sensor

Small Sound Sensor :


Now blow air near  small sound  sensor

Now , you have successfully detected sound using sound sensor ( big and sound ) & Python.


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Publish Temperature, Humidity to Telegram using Rasp Pi, NodeRed

Hi,

In my previous post, I explained how to get temperature, humidity using DHT11 sensor using Node Red, Raspberry Pi . If you have not completed it, request you to refer to the below post : 

https://johnsylvester-johnsylvester.blogspot.com/2018/07/getting-started-with-raspberry-pi-dht11.html

I. Telegram Bot creation and Configuration:

a) Go to Telegram and search for BotFather and give
 
1 )  /newbot
2) Choose a name for your bot, in my case name is johnsylvester
3) Choose Bot name , keep in mind, it should end with "Bot" keyword , in my case it is "JohnSylvesterBot"

b)  You will get a Congratulations message. Save the Bot Token  , it will be required for configuring Node Red Telegram module.

c)  If you like to send messages to groups, you need to enable it as shown below in BotFather

1) /setjoingroups
2) it will ask for bot name : @JohnSylvesterBot
3) Give keyword : Enable , you will get a Success message saying it is enabled.

d) Exit BotFather and search for newly created Bot, in my case, it is johnsylvester bot :

e) Start johnsylvester bot  using /start command:

f) Search for "IDBot"  and start it using /start command.

 1) Give the newly created Bot name : JohnSylvesterBot
 2) Issue /getid to get the Bot id and save it, it will be required for the Node Red Flow.

II. Installing Telegram in Node Red :


a) First install all Telegram Node Red modules going to manage palettes as shown below :

b) Take the Node Red Flow from the earlier post  and complete the Node Red flow as shown below :

https://johnsylvester-johnsylvester.blogspot.com/2018/07/getting-started-with-raspberry-pi-dht11.html

c) Configure the Telegram Sender node with Bot Name and Token saved earlier as follows :

   Click Add and then Done :

d) Give the below coding in the Function node connecting Telegram Sender .Provide the chatId which was saved from IDBot   /getid : 

var msgcontent = msg.payload;

jsonmsg = {};

jsonmsg["chatId"] = "XXXXX";
jsonmsg["type"] = "message";
jsonmsg["content"] = msgcontent;
msg.payload = jsonmsg;
return msg;


Node Red Flow ( chatId masked ): 

[{"id":"dd8b2bf2.74c1d8","type":"inject","z":"ca6ebb28.cf4718","name":"","topic":"","payload":"","payloadType":"date","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":105,"y":147,"wires":[["d4fc5c1f.04397"]]},{"id":"d4fc5c1f.04397","type":"rpi-dht22","z":"ca6ebb28.cf4718","name":"","topic":"rpi-dht22","dht":"11","pintype":"0","pin":4,"x":354,"y":149,"wires":[["815e3de7.d095"]]},{"id":"815e3de7.d095","type":"function","z":"ca6ebb28.cf4718","name":"function","func":"var temp = msg.payload;\nvar hum  = msg.humidity;\n\nmsg.payload = \"The Temperature at Chennai is : \" + temp + \" C humidity : \"  + hum + \" %\";\n\nreturn msg;","outputs":1,"noerr":0,"x":515,"y":205,"wires":[["9a83148c.58fd18","5bad32f3.17b5ec"]]},{"id":"9a83148c.58fd18","type":"debug","z":"ca6ebb28.cf4718","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","x":752,"y":214,"wires":[]},{"id":"ff2ed10c.1f0da","type":"telegram sender","z":"ca6ebb28.cf4718","name":"","bot":"af6e0a39.4fd4f8","x":798,"y":412,"wires":[[]]},{"id":"5bad32f3.17b5ec","type":"function","z":"ca6ebb28.cf4718","name":"Construct Telegram msg","func":"var msgcontent = msg.payload;\n\njsonmsg = {};\n\njsonmsg[\"chatId\"] = \"XXXXXX\";\njsonmsg[\"type\"] = \"message\";\njsonmsg[\"content\"] = msgcontent;\nmsg.payload = jsonmsg;\nreturn msg;\n","outputs":1,"noerr":0,"x":600,"y":331,"wires":[["ff2ed10c.1f0da"]]},{"id":"af6e0a39.4fd4f8","type":"telegram bot","z":"","botname":"JohnSylvesterBot","usernames":"","chatids":"","baseapiurl":"","pollinterval":"300"}]

III. Deploy & Test the Node Red Flow :

a) Deploy the flow.

b) Click the Inject module.

Output will appear as follows :

Now , you have successfully got the temperature & humidity published to Telegram and debug screen.


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Blinking Laser light using KY-008 laser sensor module, Raspberry Pi , Node Red

Hi,

 I like to share my second experience connecting Raspberry Pi , KY008 (Laser  transmitter sensor module ) and Node Red.

I.Things Needed :

 1. Raspberry Pi 3 Model B+

 2. KY008 Laser Transmitter Sensor Module 
         
           

 3. Solderless board

 4. 3 Male to Female Jumper wires.

II.  Circuit Completion

Complete  the circuit has shown below 

III.  Install necessary packages :

a) Download package : http://www.airspayce.com/mikem/bcm2835/bcm2835-1.48.tar.gz

b) tar zxvf bcm2835-1.48.tar.gz

c) Compile process :
         cd bcm2835-1.48

        ./configure

                           
         make

   sudo make check

   sudo make install

d) After completing the installation of the BCM2835 library, we can install the Node-DHT-Sensor library:

                     

 sudo npm install node-dht-sensor

   

IV. Node Red Flow 

a) Start Node Red : sudo node-red-start

b) Drag and drop the nodes as shown below and wire them

c) Configure the nodes as shown below : 

 Inject node :

 Select "String" for  Payload and configure the repeat as "interval" as shown below :

 rpi-dht22  node :

Node Red Flow :

[{"id":"a25a1f7e.a4e56","type":"inject","z":"99f49bf6.8ceb48","name":"On","topic":"","payload":"1","payloadType":"str","repeat":"1","crontab":"","once":false,"onceDelay":0.1,"x":115,"y":135,"wires":[["1794f512.51b6fb"]]},{"id":"1794f512.51b6fb","type":"rpi-dht22","z":"99f49bf6.8ceb48","name":"","topic":"rpi-dht22","dht":"11","pintype":"0","pin":4,"x":513,"y":138,"wires":[[]]}]


IV. Executing the Node Red Flow 

 Click Deploy. You can see the laser sensor blinking.

Now , you have successfully got the blinking light using KY008 Sensor.


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Getting Started with Raspberry Pi, DHT11 (Temperature and Humidity Sensor ) using Node Red

Hi,

 I like to share my first experience connecting Raspberry Pi , DHT11 (Temperature/ Humidity Sensor) using Node Red.

I.Things Needed :

 1. Raspberry Pi 3 Model B+

 2. DHT11 Sensor 

 3. Solderless board

 4. 3 Male to Female Jumper wires.

II.  Circuit Completion

Complete  the circuit has shown below 

III.  Install necessary packages :

a) Download package : http://www.airspayce.com/mikem/bcm2835/bcm2835-1.56.tar.gz

b) tar zxvf bcm2835-1.56.tar.gz

c) Compile process :
         cd bcm2835-1.56

        ./configure

                             
         make

   sudo make check

   sudo make install

d) After completing the installation of the BCM2835 library, we can install the Node-DHT-Sensor library:

                     

sudo npm install node-dht-sensor

   

IV. Node Red Flow 

a) Start Node Red : sudo node-red-start

b) Drag and drop the nodes as shown below and wire them

c) Configure the nodes as shown below : 

 Inject node :

 rpi-dht22  node :

 function node :

 
      var temp = msg.payload;
      var hum  = msg.humidity;

      msg.payload = "The Temperature at Chennai is : " + temp + " C humidity : "  + hum + " %";
      return msg;

Node Red Flow :

[{"id":"815e3de7.d095","type":"function","z":"ca6ebb28.cf4718","name":"function","func":"var temp = msg.payload;\nvar hum  = msg.humidity;\n\nmsg.payload = \"The Temperature at Chennai is : \" + temp + \" C humidity : \"  + hum + \" %\";\n\nreturn msg;","outputs":1,"noerr":0,"x":515,"y":205,"wires":[["9a83148c.58fd18"]]}]


IV. Executing the Node Red Flow 

a) Click Deploy
b) Click the Inject node
c) Output will appear in the debug window

Now , you have successfully got the temperature & humidity from DHT11 Sensor.


Kindly share your comments to improve my posting.