✨ Steinhart-Hart C Coeff for Custom Thermistor (#24428)

Marlin/Configuration_adv.h

 // Custom Thermistor 1000 parameters
 //
 #if TEMP_SENSOR_0 == 1000
-  #define HOTEND0_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define HOTEND0_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define HOTEND0_BETA                 3950    // Beta value
+  #define HOTEND0_PULLUP_RESISTOR_OHMS    4700 // Pullup resistor
+  #define HOTEND0_RESISTANCE_25C_OHMS   100000 // Resistance at 25C
+  #define HOTEND0_BETA                    3950 // Beta value
+  #define HOTEND0_SH_C_COEFF                 0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_1 == 1000
-  #define HOTEND1_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define HOTEND1_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define HOTEND1_BETA                 3950    // Beta value
+  #define HOTEND1_PULLUP_RESISTOR_OHMS    4700 // Pullup resistor
+  #define HOTEND1_RESISTANCE_25C_OHMS   100000 // Resistance at 25C
+  #define HOTEND1_BETA                    3950 // Beta value
+  #define HOTEND1_SH_C_COEFF                 0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_2 == 1000
-  #define HOTEND2_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define HOTEND2_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define HOTEND2_BETA                 3950    // Beta value
+  #define HOTEND2_PULLUP_RESISTOR_OHMS    4700 // Pullup resistor
+  #define HOTEND2_RESISTANCE_25C_OHMS   100000 // Resistance at 25C
+  #define HOTEND2_BETA                    3950 // Beta value
+  #define HOTEND2_SH_C_COEFF                 0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_3 == 1000
-  #define HOTEND3_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define HOTEND3_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define HOTEND3_BETA                 3950    // Beta value
+  #define HOTEND3_PULLUP_RESISTOR_OHMS    4700 // Pullup resistor
+  #define HOTEND3_RESISTANCE_25C_OHMS   100000 // Resistance at 25C
+  #define HOTEND3_BETA                    3950 // Beta value
+  #define HOTEND3_SH_C_COEFF                 0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_4 == 1000
-  #define HOTEND4_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define HOTEND4_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define HOTEND4_BETA                 3950    // Beta value
+  #define HOTEND4_PULLUP_RESISTOR_OHMS    4700 // Pullup resistor
+  #define HOTEND4_RESISTANCE_25C_OHMS   100000 // Resistance at 25C
+  #define HOTEND4_BETA                    3950 // Beta value
+  #define HOTEND4_SH_C_COEFF                 0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_5 == 1000
-  #define HOTEND5_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define HOTEND5_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define HOTEND5_BETA                 3950    // Beta value
+  #define HOTEND5_PULLUP_RESISTOR_OHMS    4700 // Pullup resistor
+  #define HOTEND5_RESISTANCE_25C_OHMS   100000 // Resistance at 25C
+  #define HOTEND5_BETA                    3950 // Beta value
+  #define HOTEND5_SH_C_COEFF                 0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_6 == 1000
-  #define HOTEND6_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define HOTEND6_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define HOTEND6_BETA                 3950    // Beta value
+  #define HOTEND6_PULLUP_RESISTOR_OHMS    4700 // Pullup resistor
+  #define HOTEND6_RESISTANCE_25C_OHMS   100000 // Resistance at 25C
+  #define HOTEND6_BETA                    3950 // Beta value
+  #define HOTEND6_SH_C_COEFF                 0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_7 == 1000
-  #define HOTEND7_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define HOTEND7_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define HOTEND7_BETA                 3950    // Beta value
+  #define HOTEND7_PULLUP_RESISTOR_OHMS    4700 // Pullup resistor
+  #define HOTEND7_RESISTANCE_25C_OHMS   100000 // Resistance at 25C
+  #define HOTEND7_BETA                    3950 // Beta value
+  #define HOTEND7_SH_C_COEFF                 0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_BED == 1000
-  #define BED_PULLUP_RESISTOR_OHMS     4700    // Pullup resistor
-  #define BED_RESISTANCE_25C_OHMS      100000  // Resistance at 25C
-  #define BED_BETA                     3950    // Beta value
+  #define BED_PULLUP_RESISTOR_OHMS        4700 // Pullup resistor
+  #define BED_RESISTANCE_25C_OHMS       100000 // Resistance at 25C
+  #define BED_BETA                        3950 // Beta value
+  #define BED_SH_C_COEFF                     0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_CHAMBER == 1000
-  #define CHAMBER_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define CHAMBER_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define CHAMBER_BETA                 3950    // Beta value
+  #define CHAMBER_PULLUP_RESISTOR_OHMS    4700 // Pullup resistor
+  #define CHAMBER_RESISTANCE_25C_OHMS   100000 // Resistance at 25C
+  #define CHAMBER_BETA                    3950 // Beta value
+  #define CHAMBER_SH_C_COEFF                 0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_COOLER == 1000
-  #define COOLER_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
-  #define COOLER_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
-  #define COOLER_BETA                 3950    // Beta value
+  #define COOLER_PULLUP_RESISTOR_OHMS     4700 // Pullup resistor
+  #define COOLER_RESISTANCE_25C_OHMS    100000 // Resistance at 25C
+  #define COOLER_BETA                     3950 // Beta value
+  #define COOLER_SH_C_COEFF                  0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_PROBE == 1000
-  #define PROBE_PULLUP_RESISTOR_OHMS   4700    // Pullup resistor
-  #define PROBE_RESISTANCE_25C_OHMS    100000  // Resistance at 25C
-  #define PROBE_BETA                   3950    // Beta value
+  #define PROBE_PULLUP_RESISTOR_OHMS      4700 // Pullup resistor
+  #define PROBE_RESISTANCE_25C_OHMS     100000 // Resistance at 25C
+  #define PROBE_BETA                      3950 // Beta value
+  #define PROBE_SH_C_COEFF                   0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_BOARD == 1000
-  #define BOARD_PULLUP_RESISTOR_OHMS   4700    // Pullup resistor
-  #define BOARD_RESISTANCE_25C_OHMS    100000  // Resistance at 25C
-  #define BOARD_BETA                   3950    // Beta value
+  #define BOARD_PULLUP_RESISTOR_OHMS      4700 // Pullup resistor
+  #define BOARD_RESISTANCE_25C_OHMS     100000 // Resistance at 25C
+  #define BOARD_BETA                      3950 // Beta value
+  #define BOARD_SH_C_COEFF                   0 // Steinhart-Hart C coefficient
 #endif
 
 #if TEMP_SENSOR_REDUNDANT == 1000
-  #define REDUNDANT_PULLUP_RESISTOR_OHMS   4700    // Pullup resistor
-  #define REDUNDANT_RESISTANCE_25C_OHMS    100000  // Resistance at 25C
-  #define REDUNDANT_BETA                   3950    // Beta value
+  #define REDUNDANT_PULLUP_RESISTOR_OHMS  4700 // Pullup resistor
+  #define REDUNDANT_RESISTANCE_25C_OHMS 100000 // Resistance at 25C
+  #define REDUNDANT_BETA                  3950 // Beta value
+  #define REDUNDANT_SH_C_COEFF               0 // Steinhart-Hart C coefficient
 #endif
 
 /**

Marlin/src/module/temperature.cpp

   void Temperature::reset_user_thermistors() {
     user_thermistor_t default_user_thermistor[USER_THERMISTORS] = {
       #if TEMP_SENSOR_0_IS_CUSTOM
-        { true, 0, 0, HOTEND0_PULLUP_RESISTOR_OHMS, HOTEND0_RESISTANCE_25C_OHMS, 0, 0, HOTEND0_BETA, 0 },
+        { true, HOTEND0_SH_C_COEFF, 0, HOTEND0_PULLUP_RESISTOR_OHMS, HOTEND0_RESISTANCE_25C_OHMS, 0, 0, HOTEND0_BETA, 0 },
       #endif
       #if TEMP_SENSOR_1_IS_CUSTOM
-        { true, 0, 0, HOTEND1_PULLUP_RESISTOR_OHMS, HOTEND1_RESISTANCE_25C_OHMS, 0, 0, HOTEND1_BETA, 0 },
+        { true, HOTEND1_SH_C_COEFF, 0, HOTEND1_PULLUP_RESISTOR_OHMS, HOTEND1_RESISTANCE_25C_OHMS, 0, 0, HOTEND1_BETA, 0 },
       #endif
       #if TEMP_SENSOR_2_IS_CUSTOM
-        { true, 0, 0, HOTEND2_PULLUP_RESISTOR_OHMS, HOTEND2_RESISTANCE_25C_OHMS, 0, 0, HOTEND2_BETA, 0 },
+        { true, HOTEND2_SH_C_COEFF, 0, HOTEND2_PULLUP_RESISTOR_OHMS, HOTEND2_RESISTANCE_25C_OHMS, 0, 0, HOTEND2_BETA, 0 },
       #endif
       #if TEMP_SENSOR_3_IS_CUSTOM
-        { true, 0, 0, HOTEND3_PULLUP_RESISTOR_OHMS, HOTEND3_RESISTANCE_25C_OHMS, 0, 0, HOTEND3_BETA, 0 },
+        { true, HOTEND3_SH_C_COEFF, 0, HOTEND3_PULLUP_RESISTOR_OHMS, HOTEND3_RESISTANCE_25C_OHMS, 0, 0, HOTEND3_BETA, 0 },
       #endif
       #if TEMP_SENSOR_4_IS_CUSTOM
-        { true, 0, 0, HOTEND4_PULLUP_RESISTOR_OHMS, HOTEND4_RESISTANCE_25C_OHMS, 0, 0, HOTEND4_BETA, 0 },
+        { true, HOTEND4_SH_C_COEFF, 0, HOTEND4_PULLUP_RESISTOR_OHMS, HOTEND4_RESISTANCE_25C_OHMS, 0, 0, HOTEND4_BETA, 0 },
       #endif
       #if TEMP_SENSOR_5_IS_CUSTOM
-        { true, 0, 0, HOTEND5_PULLUP_RESISTOR_OHMS, HOTEND5_RESISTANCE_25C_OHMS, 0, 0, HOTEND5_BETA, 0 },
+        { true, HOTEND5_SH_C_COEFF, 0, HOTEND5_PULLUP_RESISTOR_OHMS, HOTEND5_RESISTANCE_25C_OHMS, 0, 0, HOTEND5_BETA, 0 },
       #endif
       #if TEMP_SENSOR_6_IS_CUSTOM
-        { true, 0, 0, HOTEND6_PULLUP_RESISTOR_OHMS, HOTEND6_RESISTANCE_25C_OHMS, 0, 0, HOTEND6_BETA, 0 },
+        { true, HOTEND6_SH_C_COEFF, 0, HOTEND6_PULLUP_RESISTOR_OHMS, HOTEND6_RESISTANCE_25C_OHMS, 0, 0, HOTEND6_BETA, 0 },
       #endif
       #if TEMP_SENSOR_7_IS_CUSTOM
-        { true, 0, 0, HOTEND7_PULLUP_RESISTOR_OHMS, HOTEND7_RESISTANCE_25C_OHMS, 0, 0, HOTEND7_BETA, 0 },
+        { true, HOTEND7_SH_C_COEFF, 0, HOTEND7_PULLUP_RESISTOR_OHMS, HOTEND7_RESISTANCE_25C_OHMS, 0, 0, HOTEND7_BETA, 0 },
       #endif
       #if TEMP_SENSOR_BED_IS_CUSTOM
-        { true, 0, 0, BED_PULLUP_RESISTOR_OHMS, BED_RESISTANCE_25C_OHMS, 0, 0, BED_BETA, 0 },
+        { true, BED_SH_C_COEFF, 0, BED_PULLUP_RESISTOR_OHMS, BED_RESISTANCE_25C_OHMS, 0, 0, BED_BETA, 0 },
       #endif
       #if TEMP_SENSOR_CHAMBER_IS_CUSTOM
-        { true, 0, 0, CHAMBER_PULLUP_RESISTOR_OHMS, CHAMBER_RESISTANCE_25C_OHMS, 0, 0, CHAMBER_BETA, 0 },
+        { true, CHAMBER_SH_C_COEFF, 0, CHAMBER_PULLUP_RESISTOR_OHMS, CHAMBER_RESISTANCE_25C_OHMS, 0, 0, CHAMBER_BETA, 0 },
       #endif
       #if TEMP_SENSOR_COOLER_IS_CUSTOM
-        { true, 0, 0, COOLER_PULLUP_RESISTOR_OHMS, COOLER_RESISTANCE_25C_OHMS, 0, 0, COOLER_BETA, 0 },
+        { true, COOLER_SH_C_COEFF, 0, COOLER_PULLUP_RESISTOR_OHMS, COOLER_RESISTANCE_25C_OHMS, 0, 0, COOLER_BETA, 0 },
       #endif
       #if TEMP_SENSOR_PROBE_IS_CUSTOM
-        { true, 0, 0, PROBE_PULLUP_RESISTOR_OHMS, PROBE_RESISTANCE_25C_OHMS, 0, 0, PROBE_BETA, 0 },
+        { true, PROBE_SH_C_COEFF, 0, PROBE_PULLUP_RESISTOR_OHMS, PROBE_RESISTANCE_25C_OHMS, 0, 0, PROBE_BETA, 0 },
       #endif
       #if TEMP_SENSOR_BOARD_IS_CUSTOM
-        { true, 0, 0, BOARD_PULLUP_RESISTOR_OHMS, BOARD_RESISTANCE_25C_OHMS, 0, 0, BOARD_BETA, 0 },
+        { true, BOARD_SH_C_COEFF, 0, BOARD_PULLUP_RESISTOR_OHMS, BOARD_RESISTANCE_25C_OHMS, 0, 0, BOARD_BETA, 0 },
       #endif
       #if TEMP_SENSOR_REDUNDANT_IS_CUSTOM
-        { true, 0, 0, REDUNDANT_PULLUP_RESISTOR_OHMS, REDUNDANT_RESISTANCE_25C_OHMS, 0, 0, REDUNDANT_BETA, 0 },
+        { true, REDUNDANT_SH_C_COEFF, 0, REDUNDANT_PULLUP_RESISTOR_OHMS, REDUNDANT_RESISTANCE_25C_OHMS, 0, 0, REDUNDANT_BETA, 0 },
       #endif
     };
     COPY(user_thermistor, default_user_thermistor);