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