hydroponic-controller/include/temperature.h

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#ifndef _TEMPERATURE_H_
#define _TEMPERATURE_H_
#include <OneWire.h>
#include <DallasTemperature.h>
void printAddress(DeviceAddress deviceAddress);
//first address: 28FF6C1C7216058B
//second address:
#define ONE_WIRE_BUS 18 //GPIO pin
#define TEMPERATURE_PRECISION 12 //max is 12
#define READINTERVAL_DS18B20 1000 //ms
// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
#define TEMPMEAN_SIZE 16
uint16_t tempCmean_pos=0;
// arrays to hold device addresses
DeviceAddress thermometerReservoir={0x28,0xFF,0x30,0xBA,0x85,0x16,0x03,0xB5};
float tempC_reservoir; //last reading
float tempCmean_reservoir_array[TEMPMEAN_SIZE];
float tempCmean_reservoir=DEVICE_DISCONNECTED_C;
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DeviceAddress thermometerAir={0x28,0xFF,0x6C,0x1C,0x72,0x16,0x05,0x8B};
float tempC_air; //last reading
float tempCmean_air_array[TEMPMEAN_SIZE];
float tempCmean_air=DEVICE_DISCONNECTED_C;
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void temperature_setup() {
//initialize mean array
for (uint16_t i=0;i<TEMPMEAN_SIZE;i++) {
tempCmean_reservoir_array[i]=-127;
tempCmean_air_array[i]=-127;
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}
sensors.begin();
delay(1000);
Serial.print("Locating devices...");
Serial.print("Found ");
Serial.print(sensors.getDeviceCount(), DEC);
Serial.println(" devices.");
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delay(1000);
//Serial.print("Parasite power is: ");
//if (sensors.isParasitePowerMode()) Serial.println("ON");
//else Serial.println("OFF");
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delay(1000);
//Just search for devices. Only needed when connecting a new sensor to find the address
oneWire.reset_search();
for (uint8_t i=0;i<sensors.getDeviceCount();i++){
DeviceAddress _addr;
if (!oneWire.search(_addr)) {
Serial.print("Error: Device not found");
}else{
Serial.print("Found device. Address:");
printAddress(_addr);
}
Serial.println();
}
sensors.setResolution(thermometerReservoir, TEMPERATURE_PRECISION);
sensors.setResolution(thermometerAir, TEMPERATURE_PRECISION);
}
void temperature_loop(unsigned long loopmillis) {
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static unsigned long last_read_ds18b20;
static bool flag_requestTemperatures=false;
if (loopmillis>last_read_ds18b20+READINTERVAL_DS18B20) {
if (loopmillis>last_read_ds18b20+READINTERVAL_DS18B20*10) { //timeout
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Serial.println("Warn: Request Temperatures Timeout!");
flag_requestTemperatures=false;
}
if (!flag_requestTemperatures) {
sensors.requestTemperatures(); //this takes ~600ms
flag_requestTemperatures=true;
}
if (sensors.isConversionComplete()) {
flag_requestTemperatures=false;
last_read_ds18b20=loopmillis;
tempC_reservoir = sensors.getTempC(thermometerReservoir);
if (tempC_reservoir == DEVICE_DISCONNECTED_C)
{
Serial.print(" Error reading: "); printAddress(thermometerReservoir);
}else{
tempCmean_reservoir_array[tempCmean_pos]=tempC_reservoir;
if (isValueArrayOKf(tempCmean_reservoir_array,TEMPMEAN_SIZE,DEVICE_DISCONNECTED_C)) {
tempCmean_reservoir=getMeanf(tempCmean_reservoir_array,TEMPMEAN_SIZE);
}else{
tempCmean_reservoir=DEVICE_DISCONNECTED_C;
}
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}
tempC_air = sensors.getTempC(thermometerAir);
if (tempC_air == DEVICE_DISCONNECTED_C)
{
Serial.print(" Error reading: "); printAddress(thermometerReservoir);
}else{
tempCmean_air_array[tempCmean_pos]=tempC_air;
if (isValueArrayOKf(tempCmean_air_array,TEMPMEAN_SIZE,DEVICE_DISCONNECTED_C)) {
tempCmean_air=getMeanf(tempCmean_air_array,TEMPMEAN_SIZE);
}else{
tempCmean_air=DEVICE_DISCONNECTED_C;
}
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}
tempCmean_pos++;
tempCmean_pos%=TEMPMEAN_SIZE;
}
}
}
void printAddress(DeviceAddress deviceAddress)
{
for (uint8_t i = 0; i < 8; i++)
{
// zero pad the address if necessary
if (deviceAddress[i] < 16) Serial.print("0");
Serial.print(deviceAddress[i], HEX);
}
}
#endif