diff --git a/stm-firmware/calibration.c b/stm-firmware/calibration.c
index 432b580..3919a29 100644
--- a/stm-firmware/calibration.c
+++ b/stm-firmware/calibration.c
@@ -193,6 +193,7 @@ shellmatta_retCode_t calibration_sequence_shell_cmd(shellmatta_handle_t shell, c
 	case CAL_START:
 		/* Clear errors of PT1000 reading */
 		safety_controller_ack_flag(ERR_FLAG_MEAS_ADC_WATCHDOG);
+		safety_controller_ack_flag(ERR_FLAG_OVERTEMP);
 		adc_pt1000_get_resistance_calibration(&offset, &sens_dev, &cal_active);
 		if (cal_active) {
 			shellmatta_printf(shell, "Already calibrated.\r\n\tOffset: %f\r\n\tSens: %f\r\n", offset, sens_dev);
@@ -213,6 +214,7 @@ shellmatta_retCode_t calibration_sequence_shell_cmd(shellmatta_handle_t shell, c
 					ret_val = SHELLMATTA_BUSY;
 					shellmatta_printf(shell, "Measurement...\r\n");
 					safety_controller_ack_flag(ERR_FLAG_MEAS_ADC_WATCHDOG);
+					safety_controller_ack_flag(ERR_FLAG_OVERTEMP);
 					data_buffer = calibration_acquire_data_start(512UL, &flag);
 					break;
 				} else if (stdin_data[i] == '\x03') {
@@ -264,6 +266,7 @@ shellmatta_retCode_t calibration_sequence_shell_cmd(shellmatta_handle_t shell, c
 					ret_val = SHELLMATTA_BUSY;
 					shellmatta_printf(shell, "Measurement...\r\n");
 					safety_controller_ack_flag(ERR_FLAG_MEAS_ADC_WATCHDOG);
+					safety_controller_ack_flag(ERR_FLAG_OVERTEMP);
 					data_buffer = calibration_acquire_data_start(512UL, &flag);
 					break;
 				} else if (stdin_data[i] == '\x03') {
diff --git a/stm-firmware/include/reflow-controller/safety/safety-config.h b/stm-firmware/include/reflow-controller/safety/safety-config.h
index f1e3d93..381723c 100644
--- a/stm-firmware/include/reflow-controller/safety/safety-config.h
+++ b/stm-firmware/include/reflow-controller/safety/safety-config.h
@@ -55,6 +55,7 @@ enum safety_flag {
 	ERR_FLAG_SAFETY_MEM_CORRUPT = (1<<15),
 	ERR_FLAG_SAFETY_TAB_CORRUPT = (1<<16),
 	ERR_FLAG_AMON_SUPPLY_VOLT = (1<<17),
+	ERR_FLAG_OVERTEMP = (1<<18),
 };
 
 /**
@@ -128,6 +129,11 @@ enum analog_value_monitor {
 #define SAFETY_EXT_WATCHDOG_RCC_MASK RCC_AHB1ENR_GPIODEN
 #define SAFETY_EXT_WATCHDOG_PIN (12)
 
+/**
+ * @brief Default Limit of the overtemperature detection
+ */
+#define SAFETY_DEFAULT_OVERTEMP_LIMIT_DEGC (260.0f)
+
 /**
  * @brief Key used to lock the safety flags coming from the measurment ADC from external ack'ing
  */
@@ -156,6 +162,7 @@ enum analog_value_monitor {
 					ERR_FLAG_PERSIST_ENTRY(ERR_FLAG_SAFETY_MEM_CORRUPT, true), \
 					ERR_FLAG_PERSIST_ENTRY(ERR_FLAG_SAFETY_TAB_CORRUPT, true), \
 					ERR_FLAG_PERSIST_ENTRY(ERR_FLAG_AMON_SUPPLY_VOLT, false), \
+					ERR_FLAG_PERSIST_ENTRY(ERR_FLAG_OVERTEMP, false), \
 
 #define SAFETY_CONFIG_DEFAULT_WEIGHTS 	ERR_FLAG_WEIGHT_ENTRY(ERR_FLAG_MEAS_ADC_OFF, SAFETY_FLAG_CONFIG_WEIGHT_PID), \
 			ERR_FLAG_WEIGHT_ENTRY(ERR_FLAG_MEAS_ADC_WATCHDOG, SAFETY_FLAG_CONFIG_WEIGHT_PID), \
@@ -177,5 +184,6 @@ enum analog_value_monitor {
 			ERR_FLAG_WEIGHT_ENTRY(ERR_FLAG_SAFETY_MEM_CORRUPT, SAFETY_FLAG_CONFIG_WEIGHT_PID), \
 			ERR_FLAG_WEIGHT_ENTRY(ERR_FLAG_SAFETY_TAB_CORRUPT, SAFETY_FLAG_CONFIG_WEIGHT_PANIC), \
 			ERR_FLAG_WEIGHT_ENTRY(ERR_FLAG_AMON_SUPPLY_VOLT, SAFETY_FLAG_CONFIG_WEIGHT_PID), \
+			ERR_FLAG_WEIGHT_ENTRY(ERR_FLAG_OVERTEMP, SAFETY_FLAG_CONFIG_WEIGHT_PID), \
 
 #endif /* __SAFETY_CONFIG_H__ */
diff --git a/stm-firmware/include/reflow-controller/safety/safety-controller.h b/stm-firmware/include/reflow-controller/safety/safety-controller.h
index 790d58d..730628b 100644
--- a/stm-firmware/include/reflow-controller/safety/safety-controller.h
+++ b/stm-firmware/include/reflow-controller/safety/safety-controller.h
@@ -250,7 +250,22 @@ int safety_controller_get_timing_mon_name_by_index(uint32_t index, char *buffer,
  * @brief Get the count of timing monitors
  * @return Timing monitor count
  */
-uint32_t safety_controller_get_timing_monitor_count();
+uint32_t safety_controller_get_timing_monitor_count(void);
+
+/**
+ * @brief Set the overtemperature limit and store it permanently in the EEPROM
+ *
+ * If no EEPROM is present, this will fail. The default value @ref SAFETY_DEFAULT_OVERTEMP_LIMIT_DEGC will be used.
+ * @param over_temperature Over temperature to set
+ * @return 0 if successfully saved and applied, negative if error
+ */
+int safety_controller_set_overtemp_limit(float over_temperature);
+
+/**
+ * @brief Read the current overtemperature limit.
+ * @return Over temperature limit
+ */
+float safety_controller_get_overtemp_limit(void);
 
 #endif /* __SAFETY_CONTROLLER_H__ */
 
diff --git a/stm-firmware/include/reflow-controller/settings/settings-eeprom.h b/stm-firmware/include/reflow-controller/settings/settings-eeprom.h
index 7fc0153..f7b0ee7 100644
--- a/stm-firmware/include/reflow-controller/settings/settings-eeprom.h
+++ b/stm-firmware/include/reflow-controller/settings/settings-eeprom.h
@@ -29,4 +29,8 @@ int settings_eeprom_save_calibration(float sens, float offset, bool active);
 
 int settings_eeprom_load_calibration(float *sens, float *offset, bool *active);
 
+int settings_eeprom_save_overtemp_limit(float overtemp_limit, bool active);
+
+int settings_eeprom_load_overtemp_limit(float *overtemp_limit);
+
 #endif /* __SETTINGS_SETTINGS_EEPROM_H__ */
diff --git a/stm-firmware/include/reflow-controller/settings/settings.h b/stm-firmware/include/reflow-controller/settings/settings.h
index 9168991..abe0347 100644
--- a/stm-firmware/include/reflow-controller/settings/settings.h
+++ b/stm-firmware/include/reflow-controller/settings/settings.h
@@ -54,6 +54,10 @@ int settings_load_calibration(float *sens_dev, float *offset);
 
 enum settings_load_result settings_load_pid_oven_parameters(struct oven_pid_settings *settings);
 
+enum settings_load_result settings_load_overtemp_limit(float *over_temp_limit);
+
+int settings_save_overtemp_limit(float over_temp_limit, bool active);
+
 void settings_setup(void);
 
 #endif /* __SETTINGS_SETTINGS_H__ */
diff --git a/stm-firmware/include/reflow-controller/temp-converter.h b/stm-firmware/include/reflow-controller/temp-converter.h
index febd392..a126b13 100644
--- a/stm-firmware/include/reflow-controller/temp-converter.h
+++ b/stm-firmware/include/reflow-controller/temp-converter.h
@@ -29,4 +29,13 @@
  */
 int temp_converter_convert_resistance_to_temp(float resistance, float *temp_out);
 
+/**
+ * @brief Convert temperature to PT1000 resistance
+ * @param temp Temperature in degrees celsius
+ * @param[out] resistance_out Resistance value
+ * @return 0 if ok, -1 if tmeperature is below the lookup table, 1 if value is above the lookup table, -1000 in case of a pointer error,
+ *	   -100 if an internal error occured. This should never happen, if the lookup table is correct
+ */
+int temp_convertet_convert_temp_to_resistance(float temp, float *resistance_out);
+
 #endif /* __TEMP_CONVERTER_H__ */
diff --git a/stm-firmware/main.c b/stm-firmware/main.c
index 7c90768..dc1f805 100644
--- a/stm-firmware/main.c
+++ b/stm-firmware/main.c
@@ -168,6 +168,8 @@ static inline void handle_boot_status(void)
 
 static inline void setup_system(void)
 {
+	float tmp;
+
 	setup_nvic_priorities();
 
 	/* Init safety controller and safety memory */
@@ -182,6 +184,11 @@ static inline void setup_system(void)
 	uart_gpio_config();
 	settings_setup();
 
+	/* Load the overtemperature limit from eeprom if available. Otherwise the default value will be used */
+	if (settings_load_overtemp_limit(&tmp) == SETT_LOAD_SUCCESS) {
+		safety_controller_set_overtemp_limit(tmp);
+	}
+
 	handle_boot_status();
 
 	setup_shell_uart(&shell_uart);
diff --git a/stm-firmware/safety/safety-controller.c b/stm-firmware/safety/safety-controller.c
index 17affc0..02f533f 100644
--- a/stm-firmware/safety/safety-controller.c
+++ b/stm-firmware/safety/safety-controller.c
@@ -41,6 +41,8 @@
 #include <reflow-controller/oven-driver.h>
 #include <helper-macros/helper-macros.h>
 #include <stm-periph/rcc-manager.h>
+#include <reflow-controller/temp-converter.h>
+#include <reflow-controller/adc-meas.h>
 
 /**
  * @brief Macro that checks if a given @ref error_flag is persistent
@@ -144,6 +146,13 @@ struct analog_mon {
 	uint64_t timestamp;
 };
 
+struct overtemp_config {
+	uint32_t crc_dummy_seed;
+	float overtemp_deg_celsius;
+	float overtemp_equiv_resistance;
+	uint32_t crc;
+};
+
 /**
  * @brief All safety error flags.
  */
@@ -166,6 +175,7 @@ static volatile struct error_flag IN_SECTION(.ccm.data) flags[] = {
 	ERR_FLAG_ENTRY(ERR_FLAG_SAFETY_MEM_CORRUPT),
 	ERR_FLAG_ENTRY(ERR_FLAG_SAFETY_TAB_CORRUPT),
 	ERR_FLAG_ENTRY(ERR_FLAG_AMON_SUPPLY_VOLT),
+	ERR_FLAG_ENTRY(ERR_FLAG_OVERTEMP),
 };
 
 /**
@@ -233,6 +243,45 @@ static volatile struct safety_weight IN_SECTION(.ccm.bss) flag_weights[COUNT_OF(
  */
 static uint32_t IN_SECTION(.ccm.bss) flag_weight_crc;
 
+/**
+ * @brief Configuration struct containing the overtemperature flag configuration
+ */
+static struct overtemp_config IN_SECTION(.ccm.bss) safety_controller_overtemp_config;
+
+/**
+ * @brief Configure the overtemperature flag's settings
+ * @param over_temperature Temperature to set the limit to.
+ */
+static void set_overtemp_config(float over_temperature)
+{
+	int result;
+	float resistance;
+
+	result = temp_convertet_convert_temp_to_resistance(over_temperature, &resistance);
+	/* An error in this function is really bad... */
+	if (result < -1)
+		panic_mode();
+
+	crc_unit_reset();
+	safety_controller_overtemp_config.crc_dummy_seed = 0xA4F5C7E6UL;
+	safety_controller_overtemp_config.overtemp_deg_celsius = over_temperature;
+	safety_controller_overtemp_config.overtemp_equiv_resistance = resistance;
+	crc_unit_input_array((const uint32_t *)&safety_controller_overtemp_config, wordsize_of(struct overtemp_config) - 1);
+	safety_controller_overtemp_config.crc = crc_unit_get_crc();
+}
+
+static bool over_temperature_config_check(void)
+{
+	if (safety_controller_overtemp_config.crc_dummy_seed != 0xA4F5C7E6UL)
+		return true;
+	crc_unit_reset();
+	crc_unit_input_array((const uint32_t *)&safety_controller_overtemp_config, wordsize_of(struct overtemp_config) - 1);
+	if (crc_unit_get_crc() != safety_controller_overtemp_config.crc)
+		return true;
+
+	return false;
+}
+
 /**
  * @brief Convert a flag enum to the flag number.
  *
@@ -515,6 +564,7 @@ static void safety_controller_process_active_timing_mons()
 /**
  * @brief safety_controller_process_monitor_checks
  * Process the analog and timing monitors and set the relevant flags in case of a monitor outside its limits.
+ * Furthermore, the PT1000 resistance is checked for overtemperature
  *
  * The checking of the analog monitors will only be armed after a startup delay of 1000 ms to allow the values to stabilize.
  */
@@ -524,6 +574,7 @@ static void safety_controller_process_monitor_checks(void)
 	struct analog_monitor_info amon_info;
 	uint32_t idx;
 	uint32_t analog_mon_count;
+	float pt1000_val = 1000000.0f;
 
 	if (!startup_completed && systick_get_global_tick() >= 1000)
 		startup_completed = true;
@@ -541,6 +592,11 @@ static void safety_controller_process_monitor_checks(void)
 		}
 	}
 
+	adc_pt1000_get_current_resistance(&pt1000_val);
+	if (pt1000_val > safety_controller_overtemp_config.overtemp_equiv_resistance) {
+		safety_controller_report_error(ERR_FLAG_OVERTEMP);
+	}
+
 	safety_controller_process_active_timing_mons();
 }
 
@@ -720,6 +776,9 @@ void safety_controller_init()
 	init_safety_flag_persistencies_from_default();
 	apply_config_overrides();
 
+	/* Set the default limit of the overtemperature check */
+	set_overtemp_config(SAFETY_DEFAULT_OVERTEMP_LIMIT_DEGC);
+
 	if (found_memory_state == SAFETY_MEMORY_INIT_CORRUPTED)
 		safety_controller_report_error(ERR_FLAG_SAFETY_MEM_CORRUPT);
 	else if (found_memory_state == SAFETY_MEMORY_INIT_VALID_MEMORY) {
@@ -841,6 +900,7 @@ static void safety_controller_handle_safety_adc()
  *    Aditionally, the default flag weights are restored from Flash.
  * 3) The flag persistency table is CRC checked. In case of an error, the @ref ERR_FLAG_SAFETY_TAB_CORRUPT flag is set.
  *    Aditionally, the default values of the flag persistence is restored from Flash.
+ * 4) Check the Overtemperature flag configuration structure
  */
 static void safety_controller_handle_memory_checks(void)
 {
@@ -869,6 +929,12 @@ static void safety_controller_handle_memory_checks(void)
 			safety_controller_report_error(ERR_FLAG_SAFETY_TAB_CORRUPT);
 			init_safety_flag_persistencies_from_default();
 		}
+
+		/* check overtemp struct */
+		if (over_temperature_config_check()) {
+			safety_controller_report_error(ERR_FLAG_SAFETY_TAB_CORRUPT);
+			set_overtemp_config(SAFETY_DEFAULT_OVERTEMP_LIMIT_DEGC);
+		}
 	}
 }
 
@@ -1219,4 +1285,15 @@ int safety_controller_get_timing_mon_by_index(uint32_t index, struct timing_moni
 	return 0;
 }
 
+int safety_controller_set_overtemp_limit(float over_temperature)
+{
+	set_overtemp_config(over_temperature);
+	return 0;
+}
+
+float safety_controller_get_overtemp_limit(void)
+{
+	return safety_controller_overtemp_config.overtemp_deg_celsius;
+}
+
 /** @} */
diff --git a/stm-firmware/settings/settings-eeprom.c b/stm-firmware/settings/settings-eeprom.c
index 99171bb..b9d7958 100644
--- a/stm-firmware/settings/settings-eeprom.c
+++ b/stm-firmware/settings/settings-eeprom.c
@@ -23,8 +23,8 @@
 #include <stm-periph/crc-unit.h>
 #include <string.h>
 
-#define EEPROM_HEADER_MAGIC 0xA5
-#define EEPROM_HEADER_COMP_VER 0xFF
+#define EEPROM_HEADER_MAGIC 0xC5
+#define EEPROM_HEADER_COMP_VER 0x01
 
 static const uint8_t expected_header[2] = {EEPROM_HEADER_MAGIC, EEPROM_HEADER_COMP_VER};
 
@@ -36,6 +36,12 @@ struct eeprom_calibration_settings {
 	uint32_t crc;
 };
 
+#define EEPROM_OVER_TEMP_CONFIG_BASE_ADDR (EEPROM_CALIBRATION_BASE_ADDR + sizeof(struct eeprom_calibration_settings))
+struct eeprom_over_temp_config {
+	float over_temperature;
+	uint32_t over_temp_crc;
+};
+
 static bool check_eeprom_header(void)
 {
 	uint8_t header[2] = {0};
@@ -51,6 +57,7 @@ static bool check_eeprom_header(void)
 static void settings_eeprom_zero()
 {
 	settings_eeprom_save_calibration(0.0f, 0.0f, false);
+	settings_eeprom_save_overtemp_limit(0.0, false);
 }
 
 bool settings_eeprom_detect_and_prepare(void)
@@ -138,3 +145,46 @@ int settings_eeprom_load_calibration(float *sens, float *offset, bool *active)
 		return -1;
 	}
 }
+
+int settings_eeprom_save_overtemp_limit(float overtemp_limit, bool active)
+{
+	int res;
+	struct eeprom_over_temp_config over_temp_conf_entry;
+	const uint8_t zero_vals[sizeof(over_temp_conf_entry)] = {0};
+
+	if (!active) {
+		res = spi_eeprom_write(EEPROM_OVER_TEMP_CONFIG_BASE_ADDR, (const uint8_t *)zero_vals,
+				 sizeof(zero_vals));
+		return res ? -1 : 0;
+	}
+
+	over_temp_conf_entry.over_temperature = overtemp_limit;
+	crc_unit_reset();
+	crc_unit_input_array((uint32_t *)&over_temp_conf_entry, 1);
+	over_temp_conf_entry.over_temp_crc = crc_unit_get_crc();
+	res = spi_eeprom_write(EEPROM_OVER_TEMP_CONFIG_BASE_ADDR, (const uint8_t *)&over_temp_conf_entry,
+			 sizeof(over_temp_conf_entry));
+
+	return res ? -1 : 0;
+}
+
+int settings_eeprom_load_overtemp_limit(float *overtemp_limit)
+{
+	int res;
+	struct eeprom_over_temp_config over_temp_conf_entry;
+
+	if (!overtemp_limit)
+		return -1001;
+	res = spi_eeprom_read(EEPROM_OVER_TEMP_CONFIG_BASE_ADDR, (uint8_t *)&over_temp_conf_entry,
+			sizeof(struct eeprom_over_temp_config));
+	if (res)
+		return -2;
+
+	crc_unit_reset();
+	crc_unit_input_array((uint32_t *)&over_temp_conf_entry, 1);
+	if (crc_unit_get_crc() != over_temp_conf_entry.over_temp_crc)
+		return -1;
+
+	*overtemp_limit = over_temp_conf_entry.over_temperature;
+	return 0;
+}
diff --git a/stm-firmware/settings/settings.c b/stm-firmware/settings/settings.c
index 7583e45..09d2ae8 100644
--- a/stm-firmware/settings/settings.c
+++ b/stm-firmware/settings/settings.c
@@ -64,3 +64,30 @@ void settings_setup(void)
 	else
 		settings_use_eeprom = false;
 }
+
+enum settings_load_result settings_load_overtemp_limit(float *over_temp_limit)
+{
+	int res;
+	float tmp;
+
+	if (!over_temp_limit)
+		return SETT_LOAD_ERR;
+
+	if (!settings_use_eeprom)
+		return SETT_LOAD_FILE_NOT_FOUND;
+
+	res = settings_eeprom_load_overtemp_limit(&tmp);
+	if (res)
+		return SETT_LOAD_DISK_ERR;
+	*over_temp_limit = tmp;
+
+	return SETT_LOAD_SUCCESS;
+}
+
+int settings_save_overtemp_limit(float over_temp_limit, bool active)
+{
+	if (settings_use_eeprom)
+		return settings_eeprom_save_overtemp_limit(over_temp_limit, active);
+	else
+		return -100;
+}
diff --git a/stm-firmware/shell.c b/stm-firmware/shell.c
index 8e31918..9405c97 100644
--- a/stm-firmware/shell.c
+++ b/stm-firmware/shell.c
@@ -641,6 +641,48 @@ shellmatta_retCode_t shell_cmd_update(const shellmatta_handle_t handle, const ch
 	return SHELLMATTA_OK;
 }
 
+shellmatta_retCode_t shell_cmd_overtemp_cfg(const shellmatta_handle_t handle, const char *args, uint32_t len)
+{
+	float overtemp_lim;
+	shellmatta_retCode_t ret;
+	char *argument;
+	uint32_t arg_length;
+	char option;
+	bool temp_passed = false;
+	bool persistent = false;
+
+	static const shellmatta_opt_long_t options[] = {
+		{"persistent", 'p', SHELLMATTA_OPT_ARG_NONE},
+		{NULL, '\0', SHELLMATTA_OPT_ARG_NONE},
+	};
+
+	do {
+		ret = shellmatta_opt_long(handle, options, &option, &argument, &arg_length);
+		if (ret != SHELLMATTA_OK)
+			break;
+		switch (option) {
+		case 'p':
+			persistent = true;
+			break;
+		case '\0':
+			temp_passed = true;
+			overtemp_lim = strtof(argument, NULL);
+			break;
+		}
+	} while (1);
+
+	if (temp_passed) {
+		safety_controller_set_overtemp_limit(overtemp_lim);
+		if (persistent)
+			settings_save_overtemp_limit(overtemp_lim, true);
+	}
+
+	overtemp_lim = safety_controller_get_overtemp_limit();
+	shellmatta_printf(handle, "Overtemperature configured for: %.1f °C\r\n", overtemp_lim);
+
+	return ret;
+}
+
 //typedef struct shellmatta_cmd
 //{
 //    char                    *cmd;       /**< command name                           */
@@ -650,7 +692,7 @@ shellmatta_retCode_t shell_cmd_update(const shellmatta_handle_t handle, const ch
 //    shellmatta_cmdFct_t     cmdFct;     /**< pointer to the cmd callack function    */
 //    struct shellmatta_cmd   *next;      /**< pointer to next command or NULL        */
 //} shellmatta_cmd_t;
-static shellmatta_cmd_t cmd[19] = {
+static shellmatta_cmd_t cmd[20] = {
 	{
 		.cmd = "version",
 		.cmdAlias = "ver",
@@ -801,8 +843,16 @@ static shellmatta_cmd_t cmd[19] = {
 		.helpText = "Update Firmware",
 		.usageText = "",
 		.cmdFct = shell_cmd_update,
-		.next = NULL,
+		.next = &cmd[19],
 
+	},
+	{
+		.cmd = "overtemp",
+		.cmdAlias = NULL,
+		.helpText = "Overtemperature Config",
+		.usageText = "",
+		.cmdFct = shell_cmd_overtemp_cfg,
+		.next = NULL,
 	}
 };
 
diff --git a/stm-firmware/stm32f407vet6_flash.ld b/stm-firmware/stm32f407vet6_flash.ld
index 11edd5d..cce71be 100644
--- a/stm-firmware/stm32f407vet6_flash.ld
+++ b/stm-firmware/stm32f407vet6_flash.ld
@@ -29,7 +29,7 @@ __stack_corruption_area_size = 128;
 
 /* END OF USER PARAMETERS */
 ENTRY(Reset_Handler)
-__ld_top_of_stack = 0x20020000; /* One byte above the end of the SRAM. Stack is pre-decrewmenting, so this is okay */
+__ld_top_of_stack = 0x20020000; /* One byte above the end of the SRAM. Stack is pre-decrementing, so this is okay */
 
 
 /* Available memory areas */
diff --git a/stm-firmware/temp-converter.c b/stm-firmware/temp-converter.c
index b0649ac..0c87c41 100644
--- a/stm-firmware/temp-converter.c
+++ b/stm-firmware/temp-converter.c
@@ -21,6 +21,7 @@
 #include <reflow-controller/temp-converter.h>
 #include <reflow-controller/temp-converter-data.h>
 #include <helper-macros/helper-macros.h>
+#include <stdbool.h>
 
 static const float temp_lookup[(TEMP_CONVERSION_MAX_RES-TEMP_CONVERSION_MIN_RES) / TEMP_CONVERSION_RES_STEP+1] = {TEMP_CONVERSION_ARRAY_DATA};
 
@@ -73,3 +74,49 @@ int temp_converter_convert_resistance_to_temp(float resistance, float *temp_out)
 return_ret_val:
 	return ret_val;
 }
+
+int temp_convertet_convert_temp_to_resistance(float temp, float *resistance_out)
+{
+	int retcode = 0;
+	unsigned int i;
+	float lower_temp;
+	float upper_temp;
+	float lower_resistance;
+	float upper_resistance;
+	float temp_ratio;
+	bool found = false;
+
+	if (!resistance_out)
+		return -1000;
+
+	if (temp < temp_lookup[0]) {
+		/* Requested temperature is smaller than minimum value in lookup table */
+		*resistance_out = temp_lookup[0];
+		retcode = -1;
+		goto exit;
+	} else if (temp > temp_lookup[COUNT_OF(temp_lookup) - 1]) {
+		/* Requested temperature is higher than maximum value in lookup table */
+		*resistance_out = temp_lookup[COUNT_OF(temp_lookup) -1];
+		retcode = 1;
+		goto exit;
+	}
+
+	for (i = 0U; i < (COUNT_OF(temp_lookup) - 1); i++) {
+		if (temp >= temp_lookup[i] && temp <= temp_lookup[i+1]) {
+			upper_temp = temp_lookup[i+1];
+			lower_temp = temp_lookup[i];
+			lower_resistance = TEMP_CONVERSION_MIN_RES + TEMP_CONVERSION_RES_STEP * (i);
+			upper_resistance = lower_resistance + TEMP_CONVERSION_RES_STEP;
+			found = true;
+		}
+	}
+
+	if (!found)
+		return -100;
+
+	temp_ratio = (temp - lower_temp) / (upper_temp - lower_temp);
+	*resistance_out = lower_resistance + (upper_resistance - lower_resistance) * temp_ratio;
+
+exit:
+	return retcode;
+}