ESP-IDF Basics - Assign. 3.2 · Developer Portal

Table of Contents

WS00A - This article is part of a series.

Part 1: ESP-IDF Basics - Lecture 1

Part 2: ESP-IDF Basics - Assign. 1.1

Part 3: ESP-IDF Basics - Assign. 1.2

Part 4: ESP-IDF Basics - Lecture 2

Part 5: ESP-IDF Basics - Assign. 2.1

Part 6: ESP-IDF Basics - Assign. 2.2

Part 7: ESP-IDF Basics - Assign. 2.3 (Optional)

Part 8: ESP-IDF Basics - Lecture 3

Part 9: ESP-IDF Basics - Assign. 3.1

Part 10: This Article

Part 11: ESP-IDF Basics - Assign. 3.3

In this assignment, you will read the temperature values from the on-board sensor OR the on-chip sensor depending on your board.

On board sensor e.g. Rust board

Find the part number of the sensor on your board
Find the code for driving the sensor
Read temperature from the sensor and output it on the serial port with printf.

It is not asked to develop the driver, focus on the fastest way to solve the problem and what the previous lecture was about.

On chip sensor e.g. DevkitC

Find the sensor api reference page
Find how to include, initialize and configure the sensor
Read temperature from the sensor and output it on the serial port with printf.

Hint
#

Show hint on board sensor

The sensor I2C address can be found on the EVK GitHub page.
To install a dependency, open an ESP-IDF terminal:
```
> ESP-IDF: Open ESP-IDF Terminal
```

Then use idf.py:

idf.py add-dependency "repository_name_in_the_registry"

Remember to adjust the settings in menuconfig.

Show hint on chip sensor

The information can be found in the ESP-IDF Programming guide.

Configure the sensor

    temperature_sensor_config_t temp_sensor = {
        .range_min = -10, // Minimum measurable temperature
        .range_max = 80,  // Maximum measurable temperature
        .clk_src = TEMPERATURE_SENSOR_CLK_SRC_DEFAULT
    };

Install and enable it

  // Install temperature sensor driver
  temperature_sensor_install(&temp_sensor, &temp_handle);
  temperature_sensor_enable(temp_handle);

Read the temperature

  temperature_sensor_get_celsius(temp_handle, &tsens_out)

Conclusion
#

Now that you can read the on board sensor, you’re ready to move to the last assignment of the workshop to put everything together.

Next step
#

Next assignment → Assignment 3.3

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