4 files changed, 16 insertions, 16 deletions

diff --git a/co2.h b/co2.h
index ee4f6f2..f75c94c 100644
--- a/co2.h
+++ b/co2.h
@@ -23,14 +23,14 @@ public:
     // stop potentially previously started measurement
     error = scd4x.stopPeriodicMeasurement();
     if (error) {
-        Serial.print("CO2 stopPeriodicMeasurement() error: ");
+        Serial.print("! CO2 stopPeriodicMeasurement() error: ");
         errorToString(error, errorMessage, 256);
         Serial.println(errorMessage);
     }
 
     error = scd4x.setAutomaticSelfCalibration(1);
     if (error) {
-        Serial.print("CO2 setAutomaticSelfCalibration() error: ");
+        Serial.print("! CO2 setAutomaticSelfCalibration() error: ");
         errorToString(error, errorMessage, 256);
         Serial.println(errorMessage);
     }
@@ -38,7 +38,7 @@ public:
     // Start Measurement
     error = scd4x.startLowPowerPeriodicMeasurement();
     if (error) {
-        Serial.print("CO2 startLowPowerPeriodicMeasurement() error: ");
+        Serial.print("! CO2 startLowPowerPeriodicMeasurement() error: ");
         errorToString(error, errorMessage, 256);
         Serial.println(errorMessage);
     }
@@ -51,7 +51,7 @@ public:
 
     error = scd4x.getDataReadyStatus(ready);
     if (error) {
-        Serial.print("CO2 getDataReadyStatus() error: ");
+        Serial.print("! CO2 getDataReadyStatus() error: ");
         errorToString(error, errorMessage, 256);
         Serial.println(errorMessage);
         return false;
@@ -67,7 +67,7 @@ public:
 
     error = scd4x.readMeasurement(data->co2, data->temperature, data->humidity);
     if (error) {
-        Serial.print("CO2 readMeasurement() error: ");
+        Serial.print("! CO2 readMeasurement() error: ");
         errorToString(error, errorMessage, 256);
         Serial.println(errorMessage);
     }
diff --git a/datalog.h b/datalog.h
index 57a6b9f..96a3dfd 100644
--- a/datalog.h
+++ b/datalog.h
@@ -30,9 +30,9 @@ public:
 
   void start() {
     bool sdok=SD.begin(mySD_CS, mySD_MOSI, mySD_MISO, mySD_SCLK);
-    Serial.print("sdok: ");Serial.println(sdok);
+    Serial.print("# sdok: ");Serial.println(sdok);
     logfile = SD.open("quality.csv",FILE_WRITE);
-    Serial.print("file: ");Serial.println(logfile.name());
+    Serial.print("# file: ");Serial.println(logfile.name());
     uint32_t fileSize = logfile.size();
     logfile.seek(fileSize);
     if (fileSize == 0) {
@@ -59,13 +59,13 @@ public:
              data->batteryVoltage
              );
     size_t written=logfile.write((uint8_t *)line,lineLength);
-    Serial.write(line);
-    Serial.print("written: ");Serial.println(written);
+    Serial.print("# ");Serial.write(line);
+    Serial.print("# written: ");Serial.println(written);
     if (++linesSinceLastFlush > flushThreshold) {
       logfile.flush();
       linesSinceLastFlush=0;
 
-      Serial.println("flushed");
+      Serial.println("# flushed");
     }
   }
 };
diff --git a/main.ino b/main.ino
index e51c3ea..1963870 100644
--- a/main.ino
+++ b/main.ino
@@ -34,7 +34,7 @@ void setup() {
   battery.start();
   co2.start();
   pm.start();
-  Serial.println("Waiting for first measurement... (5 sec)");
+  Serial.println("# Waiting for first measurement... (5 sec)");
 
   delay(5000);
 }
diff --git a/pm.h b/pm.h
index 4bfc10c..7ac2050 100644
--- a/pm.h
+++ b/pm.h
@@ -33,7 +33,7 @@ public:
     sensirion_i2c_init();
 
     while (sps30_probe() != 0) {
-      Serial.print("PM sensor probing failed\n");
+      Serial.println("! PM sensor probing failed");
       delay(500);
     }
 
@@ -41,13 +41,13 @@ public:
 
     ret = sps30_set_fan_auto_cleaning_interval_days(auto_clean_days);
     if (ret) {
-      Serial.print("PM setting the auto-clean interval error: ");
+      Serial.print("! PM setting the auto-clean interval error: ");
       Serial.println(ret);
     }
 
     ret = sps30_start_measurement();
     if (ret < 0) {
-      Serial.print("PM starting measurement error\n");
+      Serial.println("! PM starting measurement error");
     }
 
     awake=true;
@@ -75,7 +75,7 @@ public:
 
     ret = sps30_read_data_ready(&data_ready);
     if (ret < 0) {
-      Serial.print("PM reading data-ready flag error: ");
+      Serial.print("! PM reading data-ready flag error: ");
       Serial.println(ret);
       return false;
     } else if (!data_ready) {
@@ -92,7 +92,7 @@ public:
     ret = sps30_read_measurement(&(data->pm));
 
     if (ret <0) {
-      Serial.print("PM reading measurement error: ");
+      Serial.print("! PM reading measurement error: ");
       Serial.println(ret);
       return;
     }