add ds18b20 temperature sensors
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880c46bc78
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ca7ccc023d
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@ -13,4 +13,7 @@ platform = espressif32
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board = esp32doit-devkit-v1
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framework = arduino
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monitor_speed = 115200
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monitor_speed = 115200
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lib_deps =
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https://github.com/milesburton/Arduino-Temperature-Control-Library/
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219
src/main.cpp
219
src/main.cpp
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@ -1,5 +1,7 @@
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#include <Arduino.h>
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// ######## EC
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#define EC_PIN_ADC 4
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#define EC_PIN_FREQ 5
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#define EC_PWM_CH 0
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@ -9,14 +11,61 @@
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#define EC_ARRAY_SIZE 1024
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uint16_t ec_array[EC_ARRAY_SIZE];
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uint16_t ec_array_pos=0;
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unsigned long ec_last_read=0;
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unsigned long last_read_ec=0;
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#define EC_READ_INTERVAL 1
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// ######## Temperature
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#include <OneWire.h>
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#include <DallasTemperature.h>
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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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unsigned long last_print=0;
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float getMean(uint16_t* parray);
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uint16_t getMin(uint16_t *parray);
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uint16_t getMax(uint16_t *parray);
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float getMean(uint16_t *parray,uint16_t psize);
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float getMeanf(float *parray,uint16_t psize);
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uint16_t getMin(uint16_t *parray, uint16_t psize);
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uint16_t getMax(uint16_t *parray, uint16_t psize);
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bool isTempArrayOK(uint16_t *parray,uint16_t psize, uint16_t pcheck);
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bool isTempArrayOKf(float *parray,uint16_t psize, float pcheck);
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void printAddress(DeviceAddress deviceAddress);
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void printTemperature(DeviceAddress deviceAddress);
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void printResolution(DeviceAddress deviceAddress);
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void printData(DeviceAddress deviceAddress);
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void setup() {
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Serial.begin(115200);
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@ -25,6 +74,51 @@ void setup() {
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ledcSetup(EC_PWM_CH, EC_FREQUENCY, EC_RESOLUTION);
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ledcAttachPin(EC_PIN_FREQ, EC_PWM_CH);
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ledcWrite(EC_PWM_CH, 127);
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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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Serial.println("Setup finished");
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delay(500);
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}
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void loop() {
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@ -32,8 +126,8 @@ void loop() {
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bool flag_print=false;
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if (loopmillis>ec_last_read+EC_READ_INTERVAL) {
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ec_last_read=loopmillis;
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if (loopmillis>last_read_ec+EC_READ_INTERVAL) {
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last_read_ec=loopmillis;
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ec_array_pos++;
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flag_print= ec_array_pos==EC_ARRAY_SIZE;
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ec_array_pos%=EC_ARRAY_SIZE;
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@ -42,30 +136,104 @@ void loop() {
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//Serial.print(ec_array[ec_array_pos]); Serial.print(" ");
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}
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//if (flag_print) {
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if (loopmillis>last_print+250) {
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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();
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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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if (loopmillis>last_print+500) {
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last_print=loopmillis;
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Serial.print(getMean(ec_array),3);
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Serial.print("\t"); Serial.print(getMax(ec_array) - getMin(ec_array));
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Serial.print("EC=");
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Serial.print(getMean(ec_array,EC_ARRAY_SIZE),3);
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Serial.print("\t spread="); Serial.print(getMax(ec_array,EC_ARRAY_SIZE) - getMin(ec_array,EC_ARRAY_SIZE));
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if (isTempArrayOKf(tempCmean_reservoir,TEMPMEAN_SIZE,DEVICE_DISCONNECTED_C)){
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Serial.print("\t Treservoir="); Serial.print(getMeanf(tempCmean_reservoir,TEMPMEAN_SIZE)); Serial.print("\t Tair="); Serial.print(getMeanf(tempCmean_air,TEMPMEAN_SIZE));
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}else{
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Serial.print("\t waiting for temperature array");
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}
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Serial.println();
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}
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}
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float getMean(uint16_t *parray) {
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float getMean(uint16_t *parray,uint16_t psize) {
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double mean=0;
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for (uint16_t i=0;i<EC_ARRAY_SIZE;i++) {
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for (uint16_t i=0;i<psize;i++) {
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mean+=parray[i];
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}
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return mean/EC_ARRAY_SIZE;
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return mean/psize;
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}
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float getMeanf(float *parray,uint16_t psize) {
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double mean=0;
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for (uint16_t i=0;i<psize;i++) {
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mean+=parray[i];
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}
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return mean/psize;
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}
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bool isTempArrayOK(uint16_t *parray,uint16_t psize, uint16_t pcheck) { //check if array has error values
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for (uint16_t i=0;i<psize;i++) {
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if (parray[i]==pcheck){
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return false;
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}
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}
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return true;
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}
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bool isTempArrayOKf(float *parray,uint16_t psize, float pcheck) { //check if array has error values
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for (uint16_t i=0;i<psize;i++) {
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if (parray[i]==pcheck){
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return false;
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}
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}
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return true;
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}
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uint16_t getMin(uint16_t *parray) {
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uint16_t getMin(uint16_t *parray, uint16_t psize) {
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uint16_t min=65535;
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for (uint16_t i=0;i<EC_ARRAY_SIZE;i++) {
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for (uint16_t i=0;i<psize;i++) {
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if (parray[i]<min) {
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min=parray[i];
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}
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@ -74,13 +242,26 @@ uint16_t getMin(uint16_t *parray) {
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return min;
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}
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uint16_t getMax(uint16_t *parray) {
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uint16_t getMax(uint16_t *parray,uint16_t psize) {
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uint16_t max=0;
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for (uint16_t i=0;i<EC_ARRAY_SIZE;i++) {
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for (uint16_t i=0;i<psize;i++) {
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if (parray[i]>max) {
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max=parray[i];
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}
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}
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return max;
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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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