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retry once if temp reading fails

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This commit is contained in:
Nicu Hodos 2021-12-30 20:26:42 +01:00
parent 0ce4ca5637
commit cdb0711ba6
1 changed files with 40 additions and 17 deletions
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57
temp_sensor/src/temp_sensor.cpp
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@ -4,8 +4,8 @@
#include <TinyPower.h>
#include <DHT.h>
#define SEND_INTERVAL (int)(5*60/8)
#define SEND_VCC_INTERVAL (int)(60*60/8)
#define SEND_INTERVAL 37 // 37*8s = ~5min
#define SEND_VCC_INTERVAL (SEND_INTERVAL*6) // every half hour
// Pins
#define TEMP_POSITIVE PIN_B3
@ -15,8 +15,11 @@
struct DhtValues {
int temperature;
int humidity;
bool success;
};
DhtValues readTemp();
void turnOnDht();
void turnOffDht();
TempSensor tempSensor = TempSensor(TEMP_SENSOR);
HumiditySensor humidSensor = HumiditySensor(TEMP_SENSOR);
@ -37,34 +40,54 @@ void setup() {
}
void loop() {
if (counter % SEND_INTERVAL == 0) {
static bool retry = false;
if (retry || (counter % SEND_INTERVAL == 0)) {
DhtValues values = readTemp();
if (counter % SEND_VCC_INTERVAL == 0) {
tempSensor.sendTempAndVoltage(values.temperature);
counter = 0;
} else {
tempSensor.sendTemp(values.temperature);
if (values.success) {
if (counter % SEND_VCC_INTERVAL == 0) {
tempSensor.sendTempAndVoltage(values.temperature);
counter = 0;
} else {
tempSensor.sendTemp(values.temperature);
}
delay(100);
humidSensor.sendHumidity(values.humidity);
turnOffDht();
}
delay(100);
humidSensor.sendHumidity(values.humidity);
if (retry && !values.success) {
turnOffDht();
}
retry = !retry && !values.success;
}
TinyPower::sleep();
}
DhtValues readTemp() {
DhtValues dhtValues;
dhtValues.temperature = roundf(dht.readTemperature() * 10);
dhtValues.humidity = roundf(dht.readHumidity() * 10);
digitalWrite(TEMP_POSITIVE, LOW);
pinMode(DHT_PIN, OUTPUT);
digitalWrite(DHT_PIN, LOW);
float temp = dht.readTemperature();
float humid = dht.readHumidity();
dhtValues.success = !isnan(temp) && !isnan(humid);
dhtValues.temperature = roundf(temp * 10);
dhtValues.humidity = roundf(humid * 10);
return dhtValues;
}
ISR(WDT_vect) {
counter++;
if (((counter + 1) % SEND_INTERVAL == 0) || ((counter + 1) % SEND_VCC_INTERVAL == 0)) {
pinMode(DHT_PIN, INPUT_PULLUP);
digitalWrite(TEMP_POSITIVE, HIGH);
turnOnDht();
}
}
void turnOnDht() {
pinMode(DHT_PIN, INPUT_PULLUP);
digitalWrite(TEMP_POSITIVE, HIGH);
}
void turnOffDht() {
digitalWrite(TEMP_POSITIVE, LOW);
pinMode(DHT_PIN, OUTPUT);
digitalWrite(DHT_PIN, LOW);
}