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Added DS18B20 Tempertur measurement

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This commit is contained in:
Ollo 2024-11-28 21:58:52 +01:00
parent ab1325f07f
commit e6b18d163d
3 changed files with 45 additions and 8 deletions
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6
include/controller.h
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@ -11,7 +11,9 @@
#ifndef FANLEDCTL_PINS #ifndef FANLEDCTL_PINS
#define FANLEDCTL_PINS #define FANLEDCTL_PINS
#define FAN_PIN 12 #define FAN_PIN 12 /**< Output Pin, controlling FAN speed via PWM */
#define SIGNAL_PIN 13 #define SIGNAL_PIN 13 /**< Input Pin, reading current FANs RPM*/
#define GPIO_DS18B20 D7 /**< One-Wire used for Dallas temperature sensor */
#endif /* End FANLEDCTL_PINS */ #endif /* End FANLEDCTL_PINS */

3
platformio.ini
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@ -12,3 +12,6 @@
platform = espressif8266 platform = espressif8266
board = d1_wroom_02 board = d1_wroom_02
framework = arduino framework = arduino
lib_deps = OneWire
DallasTemperature

44
src/main.cpp
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@ -1,11 +1,19 @@
#include <Arduino.h> #include <Arduino.h>
#include <DallasTemperature.h>
#include <OneWire.h>
#include "controller.h" #include "controller.h"
#define DELAY_TIME 10000 // time between measurements [ms] #define DELAY_TIME 10000 /**< time between measurements [ms] */
#define MIN_FAN_SPEED_PERCENT 24 // minimum fan speed [%] #define MIN_FAN_SPEED_PERCENT 24 /**< minimum fan speed [%] */
#define MIN_TEMP 25 // turn fan off below [deg C] #define MIN_TEMP 25 /**< turn fan off below [deg C] */
#define MAX_TEMP 40 // turn fan to full speed above [deg C] #define MAX_TEMP 40 /**< turn fan to full speed above [deg C] */
#define INVALID_TEMP (MAX_TEMP+MAX_TEMP) /**< Invalid temperature (on sensor failures)*/
#define TEMP_SENSOR_MEASURE_SERIES 5 /**< Maximum resets */
OneWire oneWire(GPIO_DS18B20);
DallasTemperature sensors(&oneWire);
/** /**
* @brief Called once at start * @brief Called once at start
@ -14,9 +22,17 @@
void setup() { void setup() {
Serial.begin(115200); Serial.begin(115200);
/* Setup FAN Control */
pinMode(FAN_PIN, OUTPUT); pinMode(FAN_PIN, OUTPUT);
pinMode(SIGNAL_PIN, INPUT); pinMode(SIGNAL_PIN, INPUT);
/* Initialize Temperature sensor */
sensors.begin();
for(int j=0; j < TEMP_SENSOR_MEASURE_SERIES && sensors.getDeviceCount() == 0; j++)
{
delay(100);
sensors.begin();
Serial.println("Reset 1-Wire Bus");
}
} }
/** /**
@ -45,12 +61,28 @@ void setFanSpeedPercent(int p) {
analogWrite(FAN_PIN, value); analogWrite(FAN_PIN, value);
} }
float readTemperature(void)
{
int sensorCount = sensors.getDeviceCount();
if (sensorCount > 0)
{
sensors.requestTemperatures();
float temp1Raw = sensors.getTempCByIndex(0);
if (temp1Raw > 0)
{
return temp1Raw;
}
}
return INVALID_TEMP;
}
/** /**
* @brief Endless loop * @brief Endless loop
* (is called as fast as possible) * (is called as fast as possible)
*/ */
void loop() { void loop() {
float temp = /* FIXME bme.readTemperature(); */ float temp = readTemperature();
Serial.print("Temperature is "); Serial.print("Temperature is ");
Serial.print(temp); Serial.print(temp);
Serial.println(" deg C"); Serial.println(" deg C");