add bmp280

This commit is contained in:
Philipp Kramer 2023-11-15 13:16:25 +01:00
parent b3de99ea73
commit d23014fb85
4 changed files with 201 additions and 4 deletions

37
include/sensor_bmp280.h Normal file
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@ -0,0 +1,37 @@
#ifndef SENSOR_BMP280_H
#define SENSOR_BMP280_H
#include "sensordata.h"
#include <Homie.h>
#include <Adafruit_BMP280.h>
class Sensor_BMP280
{
private:
Adafruit_BMP280 *bmp280;
HomieNode *sensorNode; //reference to HomieNode
struct sensordata data_temperature; //struct values are changed in setup()
struct sensordata data_pressure; //struct values are changed in setup()
bool init_ok;
public:
Sensor_BMP280();
void loop_BMP280_temperature();
void loop_BMP280_pressure();
void init();
void setSettings_Temperature(float minchange, unsigned long senddelaymax, unsigned long readdelay);
void setSettings_Pressure(float minchange, unsigned long senddelaymax, unsigned long readdelay);
void advertise(HomieNode& p_sensorNode);
void sensorloop();
};
#endif

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@ -379,13 +379,15 @@ build_flags =
-D SENSOR_DHT22_temperature_minchange=0.2
-D SENSOR_DHT22_humidity_minchange=2.0
-D SENSOR_BMP180
-D dataBMP180_temperature_minchange=0.2
-D dataBMP180_pressure_minchange=0.5
-D SENSOR_BMP280
-D PIN_SDA=D2
-D PIN_SCL=D1
-D dataBMP280_temperature_minchange=0.2
-D dataBMP280_pressure_minchange=0.5
lib_deps =
Adafruit BMP085 Library@1.1.0
adafruit/Adafruit BMP280 Library@^2.6.8
DHT sensor library@1.3.10
ArduinoJson@6.16.1 #dependency of homie. using older version because of "ambiguous overload for operator|" error
Homie@3.0.0

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@ -82,6 +82,34 @@ HomieNode sensorNode("sensors", "Sensors","sensors"); //id, name, type
#endif
#endif
#ifdef SENSOR_BMP280
#include "sensor_bmp280.h"
Sensor_BMP280 sensor_bmp280;
#ifndef SENSOR_BMP280_temperature_minchange
#define SENSOR_BMP280_temperature_minchange 0.2
#endif
#ifndef SENSOR_BMP280_temperature_senddelaymax
#define SENSOR_BMP280_temperature_senddelaymax 5*60*1000
#endif
#ifndef SENSOR_BMP280_temperature_readdelay
#define SENSOR_BMP280_temperature_readdelay 10000
#endif
#ifndef SENSOR_BMP280_pressure_minchange
#define SENSOR_BMP280_pressure_minchange 0.5
#endif
#ifndef SENSOR_BMP280_pressure_senddelaymax
#define SENSOR_BMP280_pressure_senddelaymax 30*60*1000
#endif
#ifndef SENSOR_BMP280_pressure_readdelay
#define SENSOR_BMP280_pressure_readdelay 10000
#endif
#endif
#ifdef SENSOR_HTU21D
#include "sensor_htu21d.h"
Sensor_HTU21D sensor_htu21d;
@ -454,6 +482,13 @@ void setup() {
sensor_bmp180.setSettings_Pressure(SENSOR_BMP180_temperature_minchange,SENSOR_BMP180_temperature_senddelaymax,SENSOR_BMP180_temperature_readdelay);
#endif
#ifdef SENSOR_BMP280
sensor_bmp280.init();
sensor_bmp280.setSettings_Temperature(SENSOR_BMP280_temperature_minchange,SENSOR_BMP280_temperature_senddelaymax,SENSOR_BMP280_temperature_readdelay);
sensor_bmp280.setSettings_Pressure(SENSOR_BMP280_temperature_minchange,SENSOR_BMP280_temperature_senddelaymax,SENSOR_BMP280_temperature_readdelay);
#endif
#ifdef SENSOR_HTU21D
sensor_htu21d.init();
sensor_htu21d.setSettings_Temperature(SENSOR_HTU21D_temperature_minchange,SENSOR_HTU21D_temperature_senddelaymax,SENSOR_HTU21D_temperature_readdelay);
@ -563,6 +598,10 @@ void setup() {
sensor_bmp180.advertise(sensorNode);
#endif
#ifdef SENSOR_BMP280
sensor_bmp280.advertise(sensorNode);
#endif
#ifdef SENSOR_HTU21D
sensor_htu21d.advertise(sensorNode);
#endif
@ -648,6 +687,10 @@ void loopHandler() {
sensor_bmp180.sensorloop();
#endif
#ifdef SENSOR_BMP280
sensor_bmp280.sensorloop();
#endif
#ifdef SENSOR_HTU21D
sensor_htu21d.sensorloop();
#endif

115
src/sensor_bmp280.cpp Normal file
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@ -0,0 +1,115 @@
#ifdef SENSOR_BMP280
//Connect SCL to D1, SDA to D2, GND and 3v3
#include "sensor_bmp280.h"
Sensor_BMP280::Sensor_BMP280()
{
bmp280 = new Adafruit_BMP280();
}
void Sensor_BMP280::init() //Things to be done during setup()
{
Serial.println("initializing bmp280");
if (!bmp280->begin(0x76)){
Serial.println("#ERROR: bmp280 init fail\n");
}else{
init_ok=true; //stays false if init failed, sensor will not be read in loop
bmp280->setSampling(Adafruit_BMP280::MODE_NORMAL, /* Operating Mode. */
Adafruit_BMP280::SAMPLING_X2, /* Temp. oversampling */
Adafruit_BMP280::SAMPLING_X16, /* Pressure oversampling */
Adafruit_BMP280::FILTER_X16, /* Filtering. */
Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
}
}
//Also called during setup()
void Sensor_BMP280::setSettings_Temperature(float minchange, unsigned long senddelaymax, unsigned long readdelay)
{
data_temperature.minchange=minchange;
data_temperature.senddelaymax=senddelaymax;
data_temperature.readdelay=readdelay;
}
//Also called during setup()
void Sensor_BMP280::setSettings_Pressure(float minchange, unsigned long senddelaymax, unsigned long readdelay)
{
data_pressure.minchange=minchange;
data_pressure.senddelaymax=senddelaymax;
data_pressure.readdelay=readdelay;
}
//Called during setup
void Sensor_BMP280::advertise(HomieNode& p_sensorNode)
{
sensorNode = &p_sensorNode;
sensorNode->advertise("temperature");
sensorNode->advertise("pressure");
}
void Sensor_BMP280::sensorloop()
{
if (init_ok) {
loop_BMP280_temperature();
loop_BMP280_pressure();
}
}
void Sensor_BMP280::loop_BMP280_temperature()
{
sensordata &d=data_temperature;
bool _changed=false;
if (millis() >= (d.lastreadtime+d.readdelay)) {
d.value = bmp280->readTemperature();
if (fabs(d.lastsentvalue-d.value)>=d.minchange){
_changed=true;
}
d.lastreadtime=millis();
}
if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
Serial.print("Sending bmp280_temperature. reason=");
if (_changed) Serial.println("change"); else Serial.println("time");
if (!(isnan(d.value) == 1)){ //success
sensorNode->setProperty("temperature").send(String(d.value));
Homie.getLogger() << "temperature " << ": " << d.value << endl;
d.lastsentvalue=d.value;
}
d.lastsent=millis();
}
}
void Sensor_BMP280::loop_BMP280_pressure()
{
sensordata &d=data_pressure;
bool _changed=false;
if (millis() >= (d.lastreadtime+d.readdelay)) {
d.value = bmp280->readPressure()/100.0;
if (fabs(d.lastsentvalue-d.value)>=d.minchange){
_changed=true;
}
d.lastreadtime=millis();
}
if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
Serial.print("Sending bmp280_pressure. reason=");
if (_changed) Serial.println("change"); else Serial.println("time");
if (!(isnan(d.value) == 1)){ //success
Homie.getLogger() << "pressure " << ": " << d.value << endl;
sensorNode->setProperty("pressure").send(String(d.value));
d.lastsentvalue=d.value;
}
d.lastsent=millis();
}
}
#endif