co2_sensor: Removing INITIAL state.

ampel-firmware/co2_sensor.cpp

@@ -30,14 +30,13 @@ namespace sensor {
 
   /**
    * Define sensor states
-   * INITIAL -> initial state
-   * BOOTUP -> state after initializing the sensor, i.e. after scd.begin()
+   * BOOTUP -> initial state, until first >0 ppm values are returned
    * READY -> sensor does output valid information (> 0 ppm) and no other condition takes place
    * NEEDS_CALIBRATION -> sensor measurements are too low (< 250 ppm)
-   * PREPARE_CALIBRATION -> forced calibration was initiated, waiting for stable measurements
+   * PREPARE_CALIBRATION_UNSTABLE -> forced calibration was initiated, last measurements were too far apart
+   * PREPARE_CALIBRATION_STABLE -> forced calibration was initiated, last measurements were close to each others
    */
   enum state {
-    INITIAL,
     BOOTUP,
     READY,
     NEEDS_CALIBRATION,
@@ -45,13 +44,13 @@ namespace sensor {
     PREPARE_CALIBRATION_STABLE
   };
   const char *state_names[] = {
-      "INITIAL",
       "BOOTUP",
       "READY",
       "NEEDS_CALIBRATION",
       "PREPARE_CALIBRATION_UNSTABLE",
       "PREPARE_CALIBRATION_STABLE" };
-  state current_state = INITIAL;
+
+  state current_state = BOOTUP;
   void switchState(state);
 
   void initialize() {
@@ -82,7 +81,6 @@ namespace sensor {
     // of the ESP the SCD30 sometimes needs a long time until switching back to 2 s
     // for acclimatization. Resetting it after startup seems to fix this behaviour.
     scd30.reset();
-    switchState(BOOTUP);
 
     Serial.print(F("Setting temperature offset to -"));
     Serial.print(abs(config::temperature_offset));