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DHT22 Adafruit

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This commit is contained in:
Patrick Haßel 2025-03-02 11:25:02 +01:00
parent 422378c0cb
commit da31e2d40a
3 changed files with 30 additions and 15 deletions
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2
platformio.ini
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@ -6,7 +6,7 @@ framework = arduino
lib_deps = SPI
https://github.com/adafruit/Adafruit_BusIO
https://github.com/milesburton/Arduino-Temperature-Control-Library
https://github.com/olewolf/DHT_nonblocking
https://github.com/adafruit/DHT-sensor-library
https://github.com/adafruit/Adafruit_TSL2561
https://github.com/knolleary/pubsubclient
https://github.com/adafruit/Adafruit_BME680

2
src/Greenhouse.cpp
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@ -5,7 +5,7 @@
TSL2561 greenhouseTSL("greenhouse");
DHT22 greenhouseDHT22("greenhouse", D5);
DHT22Sensor greenhouseDHT22("greenhouse", D5);
void patrixSetup() {
greenhouseTSL.setup();

41
src/patrix/DHT22.h
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@ -1,15 +1,14 @@
#ifndef DHT22_H
#define DHT22_H
#include <dht_nonblocking.h>
#include "mqtt.h"
#include "DHT_U.h"
class DHT22 {
class DHT22Sensor {
int pin;
DHT_nonblocking sensor;
DHT_Unified dht;
unsigned long last = 0UL;
@ -19,23 +18,39 @@ public:
unsigned long intervalMs;
explicit DHT22(String name, const int pin, const unsigned long interval_ms = 5000) : pin(pin), sensor(pin, DHT_TYPE_22), name(std::move(name)), intervalMs(interval_ms) {
explicit DHT22Sensor(String name, const int pin, const unsigned long interval_ms = 5000) : pin(pin), dht(pin, DHT22), name(std::move(name)), intervalMs(interval_ms) {
//
}
void setup() {
dht.begin();
}
void loop() {
const auto now = max(1UL, millis());
float temperature = NAN;
if (last == 0 || now - last >= intervalMs) {
float temp = NAN;
float relHumid = NAN;
if (sensor.measure(&temp, &relHumid)) {
double absHumid = calculateHumidityAbsolute(temp, relHumid);
mqttPublishValue(name + "/temperature", temp, "TEMPERATURE_C");
mqttPublishValue(name + "/humidity/relative", relHumid, "HUMIDITY_RELATIVE_PERCENT");
mqttPublishValue(name + "/humidity/absolute", absHumid, "HUMIDITY_ABSOLUTE_GM3");
sensors_event_t event;
dht.temperature().getEvent(&event);
if (isnan(event.temperature)) {
Log.error("Error reading temperature!");
} else {
Log.error("Failed to read DHT22: %s", name.c_str());
temperature = event.temperature;
mqttPublishValue(name + "/temperature", temperature, "TEMPERATURE_C");
}
dht.humidity().getEvent(&event);
if (isnan(event.relative_humidity)) {
Log.error("Error reading humidity!");
} else {
mqttPublishValue(name + "/humidity/relative", event.relative_humidity, "HUMIDITY_RELATIVE_PERCENT");
if (!isnan(temperature)) {
double absHumid = calculateHumidityAbsolute(event.temperature, event.relative_humidity);
mqttPublishValue(name + "/humidity/absolute", absHumid, "HUMIDITY_ABSOLUTE_GM3");
}
}
last = now;
}
}