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brightness measurement via LED

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This commit is contained in:
andreask 2020-05-09 20:23:58 +02:00
parent 3cc9d2b6c1
commit ab3c84e259
2 changed files with 69 additions and 7 deletions
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54
Firmware/src/main.cpp
View file

@ -55,12 +55,12 @@
#endif
// Create Sensor Class
#ifdef HAS_BME280
#if defined HAS_BME280 || defined HAS_BME280_BRIGHTNESS
#include <BME280.h>
BME280 sensor;
#endif
#ifdef HAS_SHT21
#if defined HAS_SHT21 || defined HAS_SHT21_BRIGHTNESS
#include <SHT21.h>
SHT21 sensor;
#endif
@ -80,6 +80,33 @@ void blink(uint8_t num) {
}
#endif
#if defined HAS_SHT21_BRIGHTNESS || defined HAS_BME280_BRIGHTNESS
int16_t brightness()
{
unsigned int counter;
// LED Anode auf OUTPUT/LOW
pinMode(LED_A, OUTPUT);
digitalWrite(LED_A, LOW);
// LED Kathode auf OUTPUT/HIGH
pinMode(LED_K, OUTPUT);
digitalWrite(LED_K, HIGH);
delayMicroseconds(4);
// Kathode wieder auf INPUT
pinMode(LED_K,INPUT);
digitalWrite(LED_K, LOW);
// In einer Schleife zählen, bis Kathode auf LOW geht
for ( counter = 0; counter < 65000; counter++) {
if (digitalRead(LED_K)==0) break;
delayMicroseconds(5);
}
return counter;
}
#endif
// Setup Wakeup Interrupt Timer
void init_wdt()
{
@ -213,6 +240,13 @@ void loop()
int32_t temperature;
int32_t humidity;
} __attribute__ ((packed)) data;
#elif defined HAS_SHT21_BRIGHTNESS
struct lora_data {
uint8_t bat;
int32_t temperature;
int32_t humidity;
int16_t brightness;
} __attribute__ ((packed)) data;
#elif defined HAS_BME280
struct lora_data {
uint8_t bat;
@ -220,18 +254,30 @@ void loop()
int32_t humidity;
int32_t pressure;
} __attribute__ ((packed)) data;
#elif defined HAS_BME280_BRIGHTNESS
struct lora_data {
uint8_t bat;
int32_t temperature;
int32_t humidity;
int32_t pressure;
int16_t brightness;
} __attribute__ ((packed)) data;
#endif
// Get Sensor Data
#ifdef HAS_BME280
#if defined HAS_BME280 || defined HAS_BME280_BRIGHTNESS
sensor.getData(&data.temperature, &data.pressure, &data.humidity);
#endif
#ifdef HAS_SHT21
#if defined HAS_SHT21 || defined HAS_SHT21_BRIGHTNESS
data.temperature = (int32_t)(sensor.getTemperature()*100);
data.humidity = (int32_t)(sensor.getHumidity()*100);
#endif
#if defined HAS_SHT21_BRIGHTNESS || defined HAS_BME280_BRIGHTNESS
data.brightness = (int16_t)(brightness());
#endif
// Add Battery Voltage, 20mv steps, encoded into 1 Byte
uint32_t batv = readVcc();
data.bat = (uint8_t)(batv/20);

22
Firmware/src/secconfig.h
View file

@ -9,10 +9,17 @@
#define HAS_NO_SENSOR - No Sensor, just send Battery Voltage (Beacon Mode)
#define HAS_SHT21 - Sensirion SHT21 Temperature + Humidity Sensor
#define HAS_BME280 - Bosch BME280 Temperature + Humidity + Pressure Sensor
#define HAS_SHT21_BRIGHTNESS - SHT21 + Brightness via LED
#define HAS_BME280_BRIGHTNESS - BME280 + Brightness via LED
* LED Support
#define LED_PIN PIN_A7 - LED is connected to ATTiny84 Pin A7 on TinyTX SMD / TinyLora
* Brightness Measurement
LED connected between 2 pins, switched in reverse direction for brightness measurement
#define LED_K PIN_A7 - LED Cathode
#define LED_A PIN_B2 - LED Anode
* Time between Measurements
#define SLEEP_TIME 528 - Time in Seconds between Measurements. Try it out to get a good Approximation
Examples from my Tests::
@ -42,4 +49,13 @@
#define RFM69_GATEWAY 1 // NodeID of the Receiver, 1-255
#define RFM69_TXPOWER 31 // Transmitting Power 0-31, see datasheet for details
#define RFM69_ENCKEY "0123456789ABCDEF" // AES encryption key, exactly 16 characters, if set messages will be encrypted using AES 128bit
*/
*/
/*
// LoRa RFM95 + BME280 + Brightness Measurement
#define RF_LORA
#define HAS_BME280_BRIGHTNESS
#define LED_K PIN_A7
#define LED_A PIN_B2
#define SLEEP_TIME 544 // ca
*/