Hi, I'm using the sensor for a project at school, but he doesn't work.
I have tried two configurations
- Connect the sensor directly to the power adapter
- Connect the sensor to the VIN of the Arduino
But in both configuration get the same result the temperature and wind speed looks to be random. The analogue output OUT and TMP looks to return nothing.
Is my sensor broken ? Do you see what i'm doing wrong ?
Thank you
/* A demo sketch for the Modern Device Rev P Wind Sensor
* Requires a Wind Sensor Rev P from Modern Device
* http://moderndevice.com/product/wind-sensor-rev-p/
*
* The Rev P requires at least at least an 8 volt supply. The easiest way to power it
* if you are using an Arduino is to use a 9 volt or higher supply on the external power jack
* and power the sensor from Vin.
*
* Hardware hookup
* Sensor Arduino Pin
* Ground Ground
* +10-12V Vin
* Out A0
* TMP A2
*
* Paul Badger 2014
* code in the public domain
*/
const int OutPin = A0; // wind sensor analog pin hooked up to Wind P sensor "OUT" pin
const int TempPin = A2; // temp sesnsor analog pin hooked up to Wind P sensor "TMP" pin
void setup() {
Serial.begin(9600);
}
void loop() {
// read wind
int windADunits = analogRead(OutPin);
// Serial.print("RW "); // print raw A/D for debug
// Serial.print(windADunits);
// Serial.print("\t");
// wind formula derived from a wind tunnel data, annemometer and some fancy Excel regressions
// this scalin doesn't have any temperature correction in it yet
float windMPH = pow((((float)windADunits - 264.0) / 85.6814), 3.36814);
Serial.print(windMPH);
Serial.print(" MPH\t");
// temp routine and print raw and temp C
int tempRawAD = analogRead(TempPin);
// Serial.print("RT "); // print raw A/D for debug
// Serial.print(tempRawAD);
// Serial.print("\t");
// convert to volts then use formula from datatsheet
// Vout = ( TempC * .0195 ) + .400
// tempC = (Vout - V0c) / TC see the MCP9701 datasheet for V0c and TC
float tempC = ((((float)tempRawAD * 5.0) / 1024.0) - 0.400) / .0195;
Serial.print(tempC);
Serial.println(" C");
delay(750);
}
