add ds18b20 temperature sensors

platformio.ini

@@ -14,3 +14,6 @@ board = esp32doit-devkit-v1
 framework = arduino
 
 monitor_speed = 115200
+
+lib_deps =
+    https://github.com/milesburton/Arduino-Temperature-Control-Library/

src/main.cpp

@@ -1,5 +1,7 @@
 #include <Arduino.h>
 
+
+// ######## EC
 #define EC_PIN_ADC 4
 #define EC_PIN_FREQ 5
 #define EC_PWM_CH 0
@@ -9,14 +11,61 @@
 #define EC_ARRAY_SIZE 1024
 uint16_t ec_array[EC_ARRAY_SIZE];
 uint16_t ec_array_pos=0;
-unsigned long ec_last_read=0;
+unsigned long last_read_ec=0;
 #define EC_READ_INTERVAL 1
 
+// ######## Temperature
+#include <OneWire.h>
+#include <DallasTemperature.h>
+
+//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;
+float tempCmean_reservoir[TEMPMEAN_SIZE];
+
+DeviceAddress thermometerAir={0x28,0xFF,0x6C,0x1C,0x72,0x16,0x05,0x8B};
+float tempC_air;
+float tempCmean_air[TEMPMEAN_SIZE];
+
+
+    
+
+
 unsigned long last_print=0;
 
-float getMean(uint16_t* parray);
+
-uint16_t getMin(uint16_t *parray);
+
-uint16_t getMax(uint16_t *parray);
+float getMean(uint16_t *parray,uint16_t psize);
+float getMeanf(float *parray,uint16_t psize);
+uint16_t getMin(uint16_t *parray, uint16_t psize);
+uint16_t getMax(uint16_t *parray, uint16_t psize);
+bool isTempArrayOK(uint16_t *parray,uint16_t psize, uint16_t pcheck);
+bool isTempArrayOKf(float *parray,uint16_t psize, float pcheck);
+
+
+void printAddress(DeviceAddress deviceAddress);
+void printTemperature(DeviceAddress deviceAddress);
+void printResolution(DeviceAddress deviceAddress);
+void printData(DeviceAddress deviceAddress);
+
+
+
 
 void setup() {
   Serial.begin(115200);
@@ -25,6 +74,51 @@ void setup() {
   ledcSetup(EC_PWM_CH, EC_FREQUENCY, EC_RESOLUTION);
   ledcAttachPin(EC_PIN_FREQ, EC_PWM_CH);
   ledcWrite(EC_PWM_CH, 127);
+
+  //initialize mean array
+  for (uint16_t i=0;i<TEMPMEAN_SIZE;i++) {
+    tempCmean_reservoir[i]=-127;
+    tempCmean_air[i]=-127;
+  }
+
+  sensors.begin();
+  delay(1000);
+
+  Serial.print("Locating devices...");
+  Serial.print("Found ");
+  Serial.print(sensors.getDeviceCount(), DEC);
+  Serial.println(" devices.");
+
+  delay(1000);
+
+  Serial.print("Parasite power is: ");
+  if (sensors.isParasitePowerMode()) Serial.println("ON");
+  else Serial.println("OFF");
+
+  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);
+  
+
+  Serial.println("Setup finished");
+  delay(500);
 }
 
 void loop() {
@@ -32,8 +126,8 @@ void loop() {
 
   bool flag_print=false;
 
-  if (loopmillis>ec_last_read+EC_READ_INTERVAL) {
+  if (loopmillis>last_read_ec+EC_READ_INTERVAL) {
-    ec_last_read=loopmillis;
+    last_read_ec=loopmillis;
     ec_array_pos++;
     flag_print= ec_array_pos==EC_ARRAY_SIZE;
     ec_array_pos%=EC_ARRAY_SIZE;
@@ -42,30 +136,104 @@ void loop() {
     //Serial.print(ec_array[ec_array_pos]); Serial.print(" ");
   }
   
+  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
+      Serial.println("Warn: Request Temperatures Timeout!");
+      flag_requestTemperatures=false;
+    }
+    if (!flag_requestTemperatures) {
+      sensors.requestTemperatures();
+      flag_requestTemperatures=true;
+    }
+    if (sensors.isConversionComplete()) {
+      flag_requestTemperatures=false;
+      last_read_ds18b20=loopmillis;
       
-  //if (flag_print) {
+      tempC_reservoir = sensors.getTempC(thermometerReservoir);
-  if (loopmillis>last_print+250) { 
+      if (tempC_reservoir == DEVICE_DISCONNECTED_C)
+      {
+        Serial.print(" Error reading: ");  printAddress(thermometerReservoir);
+      }else{
+        tempCmean_reservoir[tempCmean_pos]=tempC_reservoir;
+      }
+
+      tempC_air = sensors.getTempC(thermometerAir);
+      if (tempC_air == DEVICE_DISCONNECTED_C)
+      {
+        Serial.print(" Error reading: ");  printAddress(thermometerReservoir);
+      }else{
+        tempCmean_air[tempCmean_pos]=tempC_air;
+      }
+
+      tempCmean_pos++;
+      tempCmean_pos%=TEMPMEAN_SIZE;
+    }
+    
+    
+  }
+
+  if (loopmillis>last_print+500) { 
     last_print=loopmillis;
-    Serial.print(getMean(ec_array),3);
+
-    Serial.print("\t"); Serial.print(getMax(ec_array) - getMin(ec_array)); 
+    Serial.print("EC=");
+    Serial.print(getMean(ec_array,EC_ARRAY_SIZE),3);
+    Serial.print("\t spread="); Serial.print(getMax(ec_array,EC_ARRAY_SIZE) - getMin(ec_array,EC_ARRAY_SIZE)); 
+
+    if (isTempArrayOKf(tempCmean_reservoir,TEMPMEAN_SIZE,DEVICE_DISCONNECTED_C)){
+      Serial.print("\t Treservoir="); Serial.print(getMeanf(tempCmean_reservoir,TEMPMEAN_SIZE)); Serial.print("\t Tair="); Serial.print(getMeanf(tempCmean_air,TEMPMEAN_SIZE));
+    }else{
+      Serial.print("\t waiting for temperature array");
+    }
+    
+
     Serial.println();   
+    
   }
   
 }
 
-float getMean(uint16_t *parray) {
+float getMean(uint16_t *parray,uint16_t psize) {
   double mean=0;
-  for (uint16_t i=0;i<EC_ARRAY_SIZE;i++) {
+  for (uint16_t i=0;i<psize;i++) {
     mean+=parray[i];
   }
 
-  return mean/EC_ARRAY_SIZE;
+  return mean/psize;
+}
+float getMeanf(float *parray,uint16_t psize) {
+  double mean=0;
+  for (uint16_t i=0;i<psize;i++) {
+    mean+=parray[i];
+  }
+
+  return mean/psize;
+}
+
+bool isTempArrayOK(uint16_t *parray,uint16_t psize, uint16_t pcheck) { //check if array has error values
+  for (uint16_t i=0;i<psize;i++) {
+    if (parray[i]==pcheck){
+      return false;
+    }
+  }
+  return true;
+}
+bool isTempArrayOKf(float *parray,uint16_t psize, float pcheck) { //check if array has error values
+  for (uint16_t i=0;i<psize;i++) {
+    if (parray[i]==pcheck){
+      return false;
+    }
+  }
+  return true;
 }
 
 
-uint16_t getMin(uint16_t *parray) {
+
+
+uint16_t getMin(uint16_t *parray, uint16_t psize) {
   uint16_t min=65535;
-  for (uint16_t i=0;i<EC_ARRAY_SIZE;i++) {
+  for (uint16_t i=0;i<psize;i++) {
     if (parray[i]<min) {
       min=parray[i];
     }
@@ -74,9 +242,9 @@ uint16_t getMin(uint16_t *parray) {
   return min;
 }
 
-uint16_t getMax(uint16_t *parray) {
+uint16_t getMax(uint16_t *parray,uint16_t psize) {
   uint16_t max=0;
-  for (uint16_t i=0;i<EC_ARRAY_SIZE;i++) {
+  for (uint16_t i=0;i<psize;i++) {
     if (parray[i]>max) {
       max=parray[i];
     }
@@ -84,3 +252,16 @@ uint16_t getMax(uint16_t *parray) {
 
   return max;
 }
+
+
+
+
+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);
+  }
+}