Jeffrey
Published © GPL3+

Measuring Solar Radiation with Arduino

Want to measure solar radiation but cant afford a Pyranometers? Well, make your own device with your Arduino board using this guide.

IntermediateFull instructions provided1 hour26,395
Measuring Solar Radiation with Arduino

Things used in this project

Hardware components

Arduino UNO
Arduino UNO
×1
Arduino Ethernet Shield 2
Arduino Ethernet Shield 2
×1
solar cell
×1
Resistor 10k ohm
Resistor 10k ohm
×1

Hand tools and fabrication machines

Digital Multimeter

Story

Read more

Schematics

Schematic

Schematic of solar panel, resistor and connections

Code

sample code for Pyranometer

Arduino
#define ANALOG_PIN A0 // Analog pin
#define RESISTANCE 10 // Resistance in thousands of ohms
#define PANEL_LENGTH 60 // Length of solar cell in mm
#define PANEL_WIDTH 20 // Width of solar cell in mm

volatile float Area;
volatile float Power;
volatile float Radiation;

/*
* Main Setup function
*/
void setup() {
// Begin serial communication
Serial.begin(9600);
while(!Serial);

delay(100);
}


/*
* Main Setup function
*/
void loop() {

Area = PANEL_LENGTH * PANEL_WIDTH / (100*100); // we are dividing by 10000 get the area in square meters

Power = pow(analogRead( ANALOG_PIN ), 2) / RESISTANCE ; // Calculating power

Radiation = Power / Area;

char *msg;

sprintf(msg, " The Solar Radiation is %f W/M2 ", Radiation); // Generating message to be printed

Serial.println(msg);

delay(1000);
}
No preview (download only).

Ethernet function code

Arduino
#include <SPI.h>
#include <Ethernet.h>

#define ANALOG_PIN A0 // Analog pin
#define RESISTANCE 10 // Resistance in thousands of ohms
#define PANEL_LENGTH 60 // Length of solar cell in mm
#define PANEL_WIDTH 20 // Width of solar cell in mm

volatile float Area;
volatile float Power;
volatile float Radiation;


// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0x0D, 0x8E, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 1, 177);

// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);

void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}


// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}


void loop() {

Area = PANEL_LENGTH * PANEL_WIDTH / (100*100); // we are dividing by 10000 get the area in square meters
Power = pow(analogRead( ANALOG_PIN ), 2) / RESISTANCE ; // Calculating power
Radiation = Power / Area;
char *msg;
sprintf(msg, " The Solar Radiation is %f W/M2 ", Radiation); // Generating message to be printed


// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 5"); // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");

/*
* Send message to client
*/
client.print(msg);
client.println("<br />");

client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
No preview (download only).

Credits

Jeffrey

Jeffrey

1 project • 9 followers
CEO, Chinavasion Wholesale Ltd., tech and cool gadgets enthusiast, creator of the Chinese e-commerce shop www.chinavasion.com

Comments