Core temperature can be negative

src/main/interface/cli.c

@@ -3015,7 +3015,7 @@ static void cliStatus(char *cmdline)
 
 #ifdef USE_ADC_INTERNAL
     uint16_t vrefintMv = getVrefMv();
-    uint16_t coretemp = getCoreTemperatureCelsius();
+    int16_t coretemp = getCoreTemperatureCelsius();
     cliPrintf(", Vref=%d.%2dV, Core temp=%ddegC", vrefintMv / 1000, (vrefintMv % 1000) / 10, coretemp);
 #endif
 

src/main/sensors/adcinternal.c

@@ -65,7 +65,7 @@ uint16_t getVrefMv(void)
 #endif
 }
 
-uint16_t getCoreTemperatureCelsius(void)
+int16_t getCoreTemperatureCelsius(void)
 {
     return coreTemperature;
 }

src/main/sensors/adcinternal.h

@@ -21,5 +21,5 @@
 
 void adcInternalInit(void);
 void adcInternalProcess(timeUs_t currentTimeUs);
-uint16_t getCoreTemperatureCelsius(void);
+int16_t getCoreTemperatureCelsius(void);
 uint16_t getVrefMv(void);