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Add support for the BH1750 light meter sensor

This commit is contained in:
Gergely Polonkai 2021-01-15 10:11:49 +01:00
parent 8f223e8877
commit 4c58cacc21
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GPG Key ID: 2D2885533B869ED4
2 changed files with 46 additions and 0 deletions
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35
WeatherStation.ino
View File

@ -35,6 +35,11 @@
# include <DHT.h>
#endif // DHT_TYPE
#ifdef HAVE_BH1750
# include <Wire.h>
# include <BH1750.h>
#endif // HAVE_BH1750
ESP8266WebServer server(80);
unsigned long last_update = 0;
@ -48,6 +53,11 @@ float humidity = 0.0;
bool raining = false;
#endif // RAIN_PIN
#ifdef HAVE_BH1750
BH1750 light;
float light_level = 0;
#endif // HAVE_BH1750
static const char TEXT_PLAIN[] PROGMEM = "text/plain";
void
@ -61,6 +71,7 @@ send_metrics()
{
static const size_t dht_size = 228;
static const size_t rain_size = 86;
static const size_t light_size = 72;
size_t message_size =
#ifdef DHT_TYPE
@ -69,6 +80,9 @@ send_metrics()
#ifdef RAIN_PIN
rain_size +
#endif // RAIN_PIN
#ifdef HAVE_BH1750
light_size +
#endif // HAVE_BH1750
1;
char message[message_size];
@ -86,12 +100,20 @@ send_metrics()
"# TYPE raining gauge\n"
"raining %d\n"
#endif // RAIN_PIN
#ifdef HAVE_BH1750
"# HELP light Ambient light, in lumens\n"
"# TYPE light gauge\n"
"light %.2f\n"
#endif // HAVE_BH1750
#ifdef DHT_TYPE
, temperature, humidity
#endif // DHT_TYPE
#ifdef RAIN_PIN
, raining ? 1 : 0
#endif // RAIN_PIN
#ifdef HAVE_BH1750
, light_level
#endif // HAVE_BH1750
);
server.send(200, "text/plain; version=0.0.4; charset=utf-8", message);
@ -147,6 +169,15 @@ setup()
pinMode(RAIN_PIN, INPUT);
#endif // RAIN_PIN
#ifdef HAVE_BH1750
Wire.begin(I2C_SDA_PIN, I2C_SCL_PIN);
if (!light.begin()) {
Serial.println("Could not find the BH1750 sensor!");
stop();
}
#endif // HAVE_BH1750
Serial.println("All set, starting the loop.");
}
@ -165,6 +196,10 @@ read_sensors()
raining = (digitalRead(RAIN_PIN) == HIGH);
#endif
#ifdef HAVE_BH1750
light_level = light.readLightLevel();
#endif // HAVE_BH1750
// Turn off the LED to indicate work is finished
digitalWrite(LED_BUILTIN, HIGH);
}

11
config.h.sample
View File

@ -53,3 +53,14 @@
// #define RAIN_PIN line
#undef RAIN_PIN
//#define RAIN_PIN D0
// Pins used for I²C communication. You will be instructed below if you need
// to uncomment these
//#define I2C_SDA_PIN D1
//#define I2C_SCL_PIN D2
// If you have a BH1750 light level sensor, remove this #undef line and
// uncomment the #define HAVE_BH1750 line. You will also have to set the SDA
// and SCL pins using the I2C_SDA_PIN and I2C_SCL_PIN defines above.
#undef HAVE_BH1750
//#define HAVE_BH1750