Temperature logger using arduino and thingspeak

Hello Arduino lovers,

In this tutorial, we are making a temperature logger using arduino and thingspeak.
Let's start

Things required:

1. Arduino Uno
2. LM35
3. Sim900 module
4. Internet pack 
5. Thinkspeak account

Temperature updation on thingspeak using sim900

In this post we are going to discuss how to upload temperature on thingspeak channel using sim 900 and arduino uno. As I had already uploaded the data on thingspeak channel using sim 900 and terminal software.

Introduction:

This project is a wireless temperature logger on thingspeak channel using gsm module and arduino.
For temperature sensor, we are using lm35, that gives output in millivolt which can be easily calibrated in  terms of  °C. We have to use adc module, since it's an analog sensor. Once the raw data is converted into temperature, we can upload the data.

Now, we are ready to upload the data on thingspeak channel. Thingspeak provides api for uploading of data. Before this, we have to use activate GPRS on sim900. We also to provide APN for accessing the internet. After activating the GPRS, we have to use GET like this:

GET http://api.thingspeak.com/update?api_key=KTQXXXXXXXXXXXXX&field1=data

Internet of things: Data uploading on thingspeak using sim900

In this post, we are going to upload data on thingspeak using sim900 module.

Things required:

1. SIM 900 module
2. USB-TTL converter
3. Terminal software
4. Account on thingspeak
5. 12 volt adapter for powering gsm module

First of all, make connections as follows:

GSM                                           USB-TTL

RX        ==============>    TX

TX        ==============>    RX

GND     ==============>   GND

Interfacing SIM900 with arduino uno

In this post, we will learn how to interface SIM900 with arduino uno.

First of all, insert sim in sim socket of GSM module. Power it up by 12V 2A dc adapter.

Now, we have to make connections as follows:

Arduino Side                       GSM module
Tx                =====>          Rx
Rx                =====>          Tx
GND            =====>          GND

The source code is given below:

    boolean bOK = HIGH;

    void setup()
    {
    Serial.begin(4800);
    delay(1200);
    }
    void loop()
    {
 
    if(bOK==1)
    {
    Serial.println("AT+CMGF=1"); // sets the SMS mode to text
    delay(1500);
    Serial.print("AT+CMGS=\""); // send the SMS number
    Serial.print("+9199XXXXXXXX"); // +91 for india
    Serial.println("\"");
    delay(1000);
    Serial.print("Hello World "); // SMS body
    delay(500);

    Serial.write(0x1A);
    Serial.write(0x0D);
    Serial.write(0x0A);
    bOK=LOW;
    }
    }

The source code is self-explanatory.

Thanks for visiting this blog.

Stay tuned for more projects !!