i have made more progress on this project the only thing still to finish is the current monitoring since i havent received the sensor yet
i have hooked up 30k and 4.7k resistors as a voltage divider and calibrated it for my 3.3v arduino,
10k LDR and 10k resistor to measure sunlight
TMP36 thermistor is working but needs better calibrated
i have a graphing function now too using Simplot
the only thing stopping me installing this in a router just now is waiting for my current sensor.
//volts
int batMonPin = A0; // input pin for the voltage divider
int batVal = 0; // variable for the A/D value
float pinVoltage = 0; // variable to hold the calculated voltage
float batteryVoltage = 0;
//current
int analogInPin = A1; // Analog input pin that the carrier board OUT is connected to
int sensorValue = 0; // value read from the carrier board
int outputValue = 0; // output in milliamps
unsigned long msec = 0;
float time = 0.0;
int sample = 0;
float totalCharge = 0.0;
float averageAmps = 0.0;
float ampSeconds = 0.0;
float ampHours = 0.0;
float wattHours = 0.0;
float amps = 0.0;
int R1 = 30000; // Resistance of R1 in ohms
int R2 = 4620; // Resistance of R2 in ohms
float ratio = 0; // Calculated from R1 / R2
//Temperature
int tempPin = A2; // TMP36 data pin
const int pinLDR = A3; // Analog Pin A0 connects across LDR
//Brightness
float valueBrightness;
//graphing
int buffer[20];
float deltaAngle = 3.14/51; //Arbitrary angle increment size
float angle = 0;
int amplitude = 100;
void setup()
{
Serial.begin(9600); // setup serial
}
void loop()
{
int data1;
int data2;
int data3;
int data4;
// Voltage Calculation
int sampleBVal = 0;
int avgBVal = 0;
int sampleAmpVal = 0;
int avgSAV = 0;
for (int x = 0; x < 10; x++){ // run through loop 10x
// read the analog in value:
sensorValue = analogRead(analogInPin);
sampleAmpVal = sampleAmpVal + sensorValue; // add samples together
batVal = analogRead(batMonPin); // read the voltage on the divider
sampleBVal = sampleBVal + batVal; // add samples together
delay (10); // let ADC settle before next 0sample
}
avgBVal = sampleBVal / 10; //divide by 10 (number of samples) to get a steady reading
pinVoltage = avgBVal * 0.00334; // Calculate the voltage on the A/D pin
ratio = (float)R1 / (float)R2;
batteryVoltage = pinVoltage * ratio; // Use the ratio calculated for the voltage divider
// to calculate the battery voltage
// temp calculaton
int reading = analogRead(tempPin); // read the input pin
// converting that reading to voltage, for 3.3v arduino use 3.3
float voltage = reading * 3.3 / 1024;
//current monitor
float amps = 0;
for(int i = 0; i < 1000; i++) {
amps = amps + (.0264 * analogRead(A1) -13.51) / 1000;
delay(1);
}
//light dependsnt resistor
valueBrightness = map(analogRead(pinLDR),200,0,0,100);
//uptime
msec = millis();
time = (float) msec / 1000.0;
// serial output
Serial.print("Volts = " );
Serial.print(batteryVoltage);
Serial.print("\t Current (amps) = ");
Serial.print(amps);
float watts = amps * batteryVoltage;
Serial.print("\t Power (Watts) = ");
Serial.print(watts);
float temperatureC = (voltage - 0.5) * 100;
Serial.print("\t degrees C = ");
Serial.print(temperatureC);
Serial.print("\t Solar output % = ");
Serial.print(valueBrightness);
Serial.print("\t Time (hours) = ");
Serial.println(time/3600);
//Generating data that will be plotted
data1 = batteryVoltage;
data2 = watts;
data3 = temperatureC;
data4 = valueBrightness;
angle = angle + deltaAngle;
plot(data1,data2,data3,data4);
delay(100); //Need some delay else the program gets swamped with data
}
void plot(int data1, int data2, int data3, int data4)
{
int pktSize;
buffer[0] = 0xCDAB; //SimPlot packet header. Indicates start of data packet
buffer[1] = 4*sizeof(int); //Size of data in bytes. Does not include the header and size fields
buffer[2] = data1;
buffer[3] = data2;
buffer[4] = data3;
buffer[5] = data4;
pktSize = 2 + 2 + (4*sizeof(int)); //Header bytes + size field bytes + data
//IMPORTANT: Change to serial port that is connected to PC
Serial.write((uint8_t * )buffer, pktSize);
}
