So I've been working on this all night and I think part of my problem is coming from lack of documentation on part of the relay I'm using. I have had no problem getting a tempF readout from the temp probe, but for the life of me, even with basic arduino tutorials from many places, I cannot get he relay to trigger.
Here is the relay I'm using:
http://www.robotgeek.com/robotgeek-relay
There is no documentation, and video on the site doesn't work.
The relay has a Vcc, Ground, and Signal.
What I'm looking to do is have a fan that kicks on at 81 degrees and turns off at 77 degrees. This is the code I was using, but again, I can't even test the code cause I can't get the relay to trigger. I have two of them, just in case.
I am by no means 100% about this code either..any help is appreciated. This forum has never let me down. Thank you as always!
Here is the relay I'm using:
http://www.robotgeek.com/robotgeek-relay
There is no documentation, and video on the site doesn't work.
The relay has a Vcc, Ground, and Signal.
What I'm looking to do is have a fan that kicks on at 81 degrees and turns off at 77 degrees. This is the code I was using, but again, I can't even test the code cause I can't get the relay to trigger. I have two of them, just in case.
I am by no means 100% about this code either..any help is appreciated. This forum has never let me down. Thank you as always!
Rich (BB code):
#include <OneWire.h>
int DS18S20_Pin = 2; //DS18S20 Signal pin on digital 2
int relay =7;
//Temperature chip i/o
OneWire ds(DS18S20_Pin); // on digital pin 2
void setup(void) {
Serial.begin(9600);
}
void loop(void) {
float temperature = getTemp();
float tempF = (temperature * 9.0)/ 5.0 + 32.0;
Serial.println(tempF);
if (tempF >60) {
digitalWrite(7,HIGH);
} else {
digitalWrite(7,LOW);
}
delay(100); //just here to slow down the output so it is easier to read
}
float getTemp(){
//returns the temperature from one DS18S20 in DEG Celsius
byte data[12];
byte addr[8];
if ( !ds.search(addr)) {
//no more sensors on chain, reset search
ds.reset_search();
return -1000;
}
if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.println("CRC is not valid!");
return -1000;
}
if ( addr[0] != 0x10 && addr[0] != 0x28) {
Serial.print("Device is not recognized");
return -1000;
}
ds.reset();
ds.select(addr);
ds.write(0x44,1); // start conversion, with parasite power on at the end
byte present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad
for (int i = 0; i < 9; i++) { // we need 9 bytes
data = ds.read();
}
ds.reset_search();
byte MSB = data[1];
byte LSB = data[0];
float tempRead = ((MSB << 8) | LSB); //using two's compliment
float TemperatureSum = tempRead / 16;
return TemperatureSum;
}
