Arduino for monitoring a remote solar powered router volts/current/thermal/light

Projects General Guidance
2

ok done v2 with the low temp protection

int voltPin = A0;     // voltage divider (middle terminal) connected to analog pin 0
int tempPin = A2;     // TMP36 data pin
int val = 0;           // variable to store the value read
int volt = 0;           // variable to store the voltage calculated

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

int LDR_Pin = A4; //analog pin 0

int hightemp = 13; // choose the pin for the LED
int lowtemp = 12; // choose the pin for the LED

float amps = 0.0;
unsigned long msec = 0;
float time = 0.0;
int sample = 0;



void setup()
{
  Serial.begin(9600);          //  setup serial
  pinMode(hightemp, OUTPUT);  // declare LED as output
  pinMode(lowtemp, OUTPUT);  // declare LED as output
}

void loop()
{
  // Voltage Calculation
  val = analogRead(voltPin);    // read the input pin
  volt = map(val, 0, 1023, 0, 29); // map 29v range
  delay(50);
  
  
  // temp calculaton
  int reading = analogRead(tempPin);    // read the input pin
  float voltage = reading * 5.0;
  voltage /= 1024.0;


  //current monitor

  // read the analog in value:
  sensorValue = analogRead(analogInPin);

  // convert to milli amps
  outputValue = (((long)sensorValue * 5000 / 1024) - 500 ) * 1000 / 133;
  amps = (float) outputValue / 1000;
  float watts = amps * voltage;

 //light dependsnt resistor
 int LDRReading  = analogRead (LDR_Pin)/10 ; 

  //uptime
  msec = millis();
  time = (float) msec / 1000.0;


  //Fan control
{
  float temperatureC = (voltage - 0.5) * 100;
  if (temperatureC > 40) {
    digitalWrite(hightemp, LOW);  // turn LED OFF
  } else {
    digitalWrite(hightemp, HIGH);  // turn LED ON
  }
  if (temperatureC < 10) {
    digitalWrite(lowtemp, LOW);  // turn LED OFF
  } else {
    digitalWrite(lowtemp, HIGH);  // turn LED ON
  }
  

// serial output
}
  Serial.print(voltage);
  Serial.print(" volts");
  Serial.print("\t Current (amps) = ");     
  Serial.print(amps); 
  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(LDRReading);
  
  Serial.print("\t Time (hours) = ");
  Serial.println(time/3600);
  
  
  delay(500);
}