Return an error if no values are recorded during readAverageData

Author: thgeorgiou

examples/Wemos/Wemos.ino

@@ -85,13 +85,15 @@ void loop() {
   sensor.clearData(data);
   sensor.readAverageData(data, 60); // 60 averages
 
+  if (data.error != H_ERROR_SENSOR) {
   // Compensate for humidity
   float humidity = dht.readHumidity();
   if (isnan(humidity)) {
     data.error |= H_ERROR_HUMIDITY;
   } else {
   sensor.humidityCompensation(data, humidity);
   }
+  }
 
   // Send the data to the hackAIR server
   String dataJson = "{\"reading\":{\"PM2.5_AirPollutantValue\":\"";

src/hackair.cpp

@@ -157,6 +157,8 @@ void hackAIR::readAverageData(hackAirData &data, uint8_t n) {
 
     if (successes != n) {
         data.error = H_ERROR_SENSOR_ONCE;
+    } else if (successes == 0) {
+        data.error = H_ERROR_SENSOR;
     } else {
         data.error = H_NO_ERROR;
     }