Nicht crashen wenn beim booten kein DS18B20 gefunden wird

stattdessen zyklisch versuchen den Sensor zu dfinden

Ausserdem blinkt die LED jetzt rot wenn kein Temp Sensor angeschlossen
ist (oder der Drucksensor fehlt)

pio/src/main.cpp

@@ -48,6 +48,9 @@ uint32_t next_vale_calc = 0;
 float opening_time = 0.0;
 uint16_t times_open = 0;
 
+static bool ds_failure = false;
+static timeout timer_init_ds;
+
 #define MosFET D0
 #define LED_RED D4
 #define LED_GREEN D5
@@ -65,7 +68,7 @@ FastRunningMedian<int, 5>* median_temp;
 
 // definitions go here
 MCP3221_Base ADC_;
-OneWire *oneWire;
+OneWire *oneWire = nullptr;
 DallasTemperature DS18B20;
 MR44V064B_Base FRAM; 
 
@@ -960,7 +963,6 @@ void setup()
   bool validConf = readConfig();
   if (!validConf)
     CONSOLELN(F("\nERROR config corrupted"));
-  initDS18B20();
 
   setup_displayInit();
 
@@ -981,9 +983,15 @@ void setup()
   //Pressure = (float((double)raw_data * 0.0030517578125));
 
   // call as late as possible since DS needs converge time
-  int temp;
-  getTemperature(temp, true);
+  int temp = 20;
 
+  if (initDS18B20())
+    getTemperature(temp, true);
+  else {
+    ds_failure = true;
+    set_timer(timer_init_ds, 1000);
+  }
+
   median_temp = new FastRunningMedian<int, 5>(temp);
   median_pressure = new FastRunningMedian<uint16_t, 5>(raw_data);
   adc_mean.init(10, raw_data);
@@ -1011,7 +1019,6 @@ void setup()
   {
     CONSOLE(F("IP: "));
     CONSOLELN(WiFi.localIP());
-    uploadData();
   }
   else
   {
@@ -1077,7 +1084,7 @@ void loop()
   unsigned long looptime = now - prev;
 
   static timeout timer_apicall(g_flashConfig.interval * 1000);
-  static timeout timer_display, timer_init_ds;
+  static timeout timer_display;
   static int temp_raw = 0;
 
   drd.loop();
@@ -1093,11 +1100,12 @@ void loop()
     set_timer(timer_apicall, g_flashConfig.interval * 1000);
   }
 
-  if(isDS18B20ready() && temp_raw != DEVICE_DISCONNECTED_RAW)
+  if(isDS18B20ready() && !ds_failure)
   {
     getTemperature(temp_raw, true);
 
     if (temp_raw != DEVICE_DISCONNECTED_RAW) {
+      ds_failure = false;
       median_temp->addValue(temp_raw);
 
       temp_mean.add(median_temp->getMedian());
@@ -1106,21 +1114,23 @@ void loop()
       requestTemp();
     }
     else {
+      ds_failure = true;
       Serial.println("DS18B20 disconnected? Trying to reinit in 1 sec");
       set_timer(timer_init_ds, 1000);
     }
   }
 
-  if (timer_expired(timer_init_ds) && temp_raw == DEVICE_DISCONNECTED_RAW) {
+  if (timer_expired(timer_init_ds) && ds_failure) {
       Serial.println("DS18B20 disconnected? Trying to reinit");
       pinMode(ONE_WIRE_BUS, OUTPUT);
       digitalWrite(ONE_WIRE_BUS, LOW);
       delay(100);
-      oneWire->reset();
+      if (oneWire)
+        oneWire->reset();
 
       if (initDS18B20()) {
         requestTemp();
-        temp_raw = 0;
+        ds_failure = false;
       }
       else {
         set_timer(timer_init_ds, 1000);
@@ -1149,7 +1159,7 @@ void loop()
     blink_yellow();
   }
   else {
-    if (valid_reading) {
+    if (valid_reading && !ds_failure) {
       if(Pressure >= p_Basic_config_->value_red)
         set_red();
       else if(carbondioxide < p_Controller_->setpoint_carbondioxide * p_Basic_config_->value_blue / 100.f)