refactor: added DEVICE_INSUFFICIENT_POWER_RAW for insufficient power error

Author: Laxilef

DallasTemperature.cpp

@@ -558,11 +558,12 @@ int32_t DallasTemperature::calculateTemperature(const uint8_t* deviceAddress, ui
                        | neg;
     }
 
-    // detect fake data
-    if (deviceAddress[DSROM_FAMILY] == DS18B20MODEL && scratchPad[6] == 0x0C) {
-        if ((scratchPad[0] == 0x50 && scratchPad[1] == 0x05) || 
-            (scratchPad[0] == 0xFF && scratchPad[1] == 0x07)) {
+    // detect POR and insufficient power conditions
+    if (deviceAddress[DSROM_FAMILY] == DS18B20MODEL) {
+        if (scratchPad[0] == 0x50 && scratchPad[1] == 0x05 && scratchPad[6] == 0x0C) {
             return DEVICE_POWER_ON_RESET_RAW;
+        } else if (scratchPad[0] == 0xFF && scratchPad[1] == 0x07) {
+            return DEVICE_INSUFFICIENT_POWER_RAW;
         }
     }
 

DallasTemperature.h

@@ -50,6 +50,10 @@
 #define DEVICE_POWER_ON_RESET_F -419.799988
 #define DEVICE_POWER_ON_RESET_RAW -32128
 
+#define DEVICE_INSUFFICIENT_POWER_C -250
+#define DEVICE_INSUFFICIENT_POWER_F -418.0
+#define DEVICE_INSUFFICIENT_POWER_RAW -32000
+
 // Configuration Constants
 #define MAX_CONVERSION_TIMEOUT 750
 #define MAX_INITIALIZATION_RETRIES 3

keywords.txt

@@ -87,4 +87,7 @@ DEVICE_FAULT_SHORTVDD_F	LITERAL1
 DEVICE_FAULT_SHORTVDD_RAW	LITERAL1
 DEVICE_POWER_ON_RESET_C	LITERAL1
 DEVICE_POWER_ON_RESET_F	LITERAL1
-DEVICE_POWER_ON_RESET_RAW	LITERAL1
+DEVICE_POWER_ON_RESET_RAW	LITERAL1
+DEVICE_INSUFFICIENT_POWER_C	LITERAL1
+DEVICE_INSUFFICIENT_POWER_F	LITERAL1
+DEVICE_INSUFFICIENT_POWER_RAW	LITERAL1

test/unit_test_001.cpp

@@ -51,6 +51,10 @@ unittest(test_error_code) {
     assertEqual(DEVICE_POWER_ON_RESET_C, -251);
     assertEqualFloat(DEVICE_POWER_ON_RESET_F, -419.8, 0.1);
     assertEqual(DEVICE_POWER_ON_RESET_RAW, -32128);
+
+    assertEqual(DEVICE_INSUFFICIENT_POWER_C, -250);
+    assertEqualFloat(DEVICE_INSUFFICIENT_POWER_F, -418.0, 0.1);
+    assertEqual(DEVICE_INSUFFICIENT_POWER_RAW, -32000);
 }
 
 // Test basic initialization and functionality of the DallasTemperature library