Chapter 2. API Reference
The conversion relationship is the first columns of the table below. Among them, offset = 0 is the main measurement
option, and other values are extended measurement options.
offset measure range(Celsius) measure error(Celsius)
-2 50 ~ 125 < 3
-1 20 ~ 100 < 2
0 -10 ~ 80 < 1
1 -30 ~ 50 < 2
2 -40 ~ 20 < 3
Driver Usage
1. Initialize the temperature sensor by calling the function temp_sensor_set_config() and pass to it a
temp_sensor_config_t structure. The temp_sensor_config_t structure should contain all the
required parameters. See the example below.
temp_sensor_config_t temp_sensor = {
.dac_offset = TSENS_DAC_L2,
.clk_div = 6,
};
temp_sensor_set_config(temp_sensor);
2. Start the temp_sensor by calling :cpp:func:’temp_sensor_start’. The temperature sensor will now measure
the temperature.
3. To get the current temperature, take the example below as a reference, the value you get is in Celsius.
float tsens_out;
temp_sensor_read_celsius(&tsens_out);
4. To stop the temperature sensor, please call :cpp:func:’temp_sensor_stop’.
Note: If you want dynamic reconfiguration, you need to stop the sensor first (temp_sensor_stop), set the new
configuration (temp_sensor_set_config), then start the sensor again (temp_sensor_start).
Application Example
Temperature sensor reading example: peripherals/temp_sensor.
API Reference - Normal Temp Sensor
Header File
• components/driver/esp32s2/include/driver/temp_sensor.h
Functions
esp_err_t temp_sensor_set_config(temp_sensor_config_t tsens)
Set parameter of temperature sensor.
Return
• ESP_OK Success
Parameters
• tsens:
esp_err_t temp_sensor_get_config(temp_sensor_config_t *tsens)
Get parameter of temperature sensor.
Espressif Systems 395
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