Add new commands for configuring thermistor parameters:

CONFigure:SENSORx:BETAcoeff CONFigure:SENSORx:BETAcoeff? CONFigure:SENSORx:THERmistor CONFigure:SENSORx:THERmistor? CONFigure:SENSORx:TEMPNominal CONFigure:SENSORx:TEMPNominal?
tjko · Mar 19, 2022 · 4a17329 · 4a17329
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diff --git a/commands.md b/commands.md
@@ -48,6 +48,12 @@ Fanpico supports following commands:
 * [CONFigure:SENSORx:TEMPCoeff?](#configuresensorxtempcoeff-1)
 * [CONFigure:SENSORx:TEMPMap](#configuresensorxtempmap)
 * [CONFigure:SENSORx:TEMPMap?](#configuresensorxtempmap-1)
+* [CONFigure:SENSORx:BETAcoeff](#configuresensorxbetacoeff)
+* [CONFigure:SENSORx:BETAcoeff?](#configuresensorxbetacoeff-1)
+* [CONFigure:SENSORx:THERmistor](#configuresensorxthermistor)
+* [CONFigure:SENSORx:THERmistor?](#configuresensorxthermistor-1)
+* [CONFigure:SENSORx:TEMPNominal](#configuresensorxtempnominal)
+* [CONFigure:SENSORx:TEMPNominal?](#configuresensorxtempnominal-1)
 * [MEASure:Read?](#measureread)
 * [MEASure:FANx?](#measurefanx)
 * [MEASure:FANx:Read?](#measurefanxread)
@@ -641,6 +647,68 @@ CONF:SENSOR1:TEMPMAP?
 20,0,50,10000
 ```
 
+#### CONFigure:SENSORx:BETAcoeff
+Set beta coefficient of thermistor used to measure temperatur.
+Typically thermistor beta coefficient is in the range 3000-4000.
+
+Default: 3950
+
+For example:
+```
+CONF:SENSOR1:BETA 3950
+```
+
+#### CONFigure:SENSORx:BETAcoeff?
+Get the configured beta coefficient of the thermistor used to measure temperature.
+
+For example:
+```
+CONF:SENSOR1:BETA?
+3950
+```
+
+#### CONFigure:SENSORx:THERmistor
+Set thermistor nominal resistance at nominal (room) temperature.
+Typically this is either 10000 (for 10k thermistors) or 100000 (for 100k thermistors).
+
+Default: 10000
+
+For example: configure 100k thermistor
+```
+CONF:SENSOR1:THER 100000
+```
+
+#### CONFigure:SENSORx:THERmistor?
+Get the thermistor nominal resistance at nominal (room) temperature.
+
+For example:
+```
+CONF:SENSOR1:THER?
+100000
+```
+
+#### CONFigure:SENSORx:TEMPNominal
+Set nominal temperature of the thermistor (in C).
+Typically nominal temperature is around room temperature.
+
+Default: 25.0
+
+For example:
+```
+CONF:SENSOR1:TEMPN 25.0
+```
+
+#### CONFigure:SENSORx:TEMPNominal?
+Get nominal temperature of the thermistor (in C).
+
+For example:
+```
+CONF:SENSOR1:TEMPN?
+25.0
+```
+
+
+
 ### MEASure Commands
 These commands are for reading (measuring) the current input/output values on Fan and Motherboard Fan ports.
 

diff --git a/src/command.c b/src/command.c
@@ -864,6 +864,81 @@ int cmd_sensor_temp_coef(const char *cmd, const char *args, int query, char *pre
 	return 0;
 }
 
+int cmd_sensor_temp_nominal(const char *cmd, const char *args, int query, char *prev_cmd)
+{
+	int sensor;
+	float val;
+
+	sensor = atoi(&prev_cmd[6]) - 1;
+	if (sensor >= 0 && sensor < SENSOR_MAX_COUNT) {
+		if (query) {
+			printf("%.1f\n", conf->sensors[sensor].temp_nominal);
+		} else {
+			val = atof(args);
+			if (val >= -50.0 && val <= 100.0) {
+				debug(1, "sensor%d: change temp nominal %.1fC --> %.1fC\n",
+					sensor + 1, conf->sensors[sensor].temp_nominal,
+					val);
+				conf->sensors[sensor].temp_nominal = val;
+			} else {
+				debug(1, "sensor%d: invalid temp nominal: %f\n",
+					sensor + 1, val);
+			}
+		}
+	}
+	return 0;
+}
+
+int cmd_sensor_ther_nominal(const char *cmd, const char *args, int query, char *prev_cmd)
+{
+	int sensor;
+	float val;
+
+	sensor = atoi(&prev_cmd[6]) - 1;
+	if (sensor >= 0 && sensor < SENSOR_MAX_COUNT) {
+		if (query) {
+			printf("%.0f\n", conf->sensors[sensor].thermistor_nominal);
+		} else {
+			val = atof(args);
+			if (val > 0.0) {
+				debug(1, "sensor%d: change thermistor nominal %.0f ohm --> %.0f ohm\n",
+					sensor + 1, conf->sensors[sensor].thermistor_nominal,
+					val);
+				conf->sensors[sensor].thermistor_nominal = val;
+			} else {
+				debug(1, "sensor%d: invalid thermistor nominal: %f\n",
+					sensor + 1, val);
+			}
+		}
+	}
+	return 0;
+}
+
+int cmd_sensor_beta_coef(const char *cmd, const char *args, int query, char *prev_cmd)
+{
+	int sensor;
+	float val;
+
+	sensor = atoi(&prev_cmd[6]) - 1;
+	if (sensor >= 0 && sensor < SENSOR_MAX_COUNT) {
+		if (query) {
+			printf("%.0f\n", conf->sensors[sensor].beta_coefficient);
+		} else {
+			val = atof(args);
+			if (val > 0.0) {
+				debug(1, "sensor%d: change thermistor beta coefficient %.0f --> %.0f\n",
+					sensor + 1, conf->sensors[sensor].beta_coefficient,
+					val);
+				conf->sensors[sensor].beta_coefficient = val;
+			} else {
+				debug(1, "sensor%d: invalid thermistor beta coefficient: %f\n",
+					sensor + 1, val);
+			}
+		}
+	}
+	return 0;
+}
+
 int cmd_sensor_temp_map(const char *cmd, const char *args, int query, char *prev_cmd)
 {
 	int sensor, i, count;
@@ -965,10 +1040,13 @@ struct cmd_t mbfan_c_commands[] = {
 };
 
 struct cmd_t sensor_c_commands[] = {
-	{ "NAME",       4, NULL,             cmd_sensor_name },
-	{ "TEMPOffset", 5, NULL,             cmd_sensor_temp_offset },
-	{ "TEMPCoeff",  5, NULL,             cmd_sensor_temp_coef },
-	{ "TEMPMap",    5, NULL,             cmd_sensor_temp_map },
+	{ "NAME",        4, NULL,             cmd_sensor_name },
+	{ "TEMPOffset",  5, NULL,             cmd_sensor_temp_offset },
+	{ "TEMPCoeff",   5, NULL,             cmd_sensor_temp_coef },
+	{ "TEMPMap",     5, NULL,             cmd_sensor_temp_map },
+	{ "TEMPNominal", 5, NULL,             cmd_sensor_temp_nominal },
+	{ "THERmistor",  4, NULL,             cmd_sensor_ther_nominal },
+	{ "BETAcoeff",   4, NULL,             cmd_sensor_beta_coef },
 	{ 0, 0, 0, 0 }
 };