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57 lines
2.4 KiB
Markdown
57 lines
2.4 KiB
Markdown
| Supported Targets | ESP32-S2 | ESP32-C3 | ESP32-S3 |
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| ----------------- | -------- | -------- | -------- |
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# Temperature Sensor Example
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The ESP32-S2/C3/S3 has a built-in temperature sensor. The temperature sensor module contains an 8-bit Sigma-Delta ADC and a temperature offset DAC.
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The conversion relationship is the first two columns of the table below. Among them, `offset = 0`(default) is the main measurement option, and other values are extended measurement options.
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| DAC level | offset | measure range(℃) | measure error(℃) |
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| :-------: | :----: | :--------------: | :--------------: |
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| 0 | -2 | 50 ~ 125 | < 3 |
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| 1 | -1 | 20 ~ 100 | < 2 |
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| 2 | 0 | -10 ~ 80 | < 1 |
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| 3 | 1 | -30 ~ 50 | < 2 |
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| 4 | 2 | -40 ~ 20 | < 3 |
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## How to use example
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Before project configuration and build, be sure to set the correct chip target using `idf.py set-target <chip_name>`.
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### Hardware Required
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* A development board with ESP32-S2/C3/S3 SoC (e.g., ESP32-S2-Saola-1, ESP32-S2-DevKitM-1, ESP32-C3-DevKitM-1, ESP32-S3-WROOM-1, etc.)
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* A USB cable for power supply and programming
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### Build and Flash
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Build the project and flash it to the board, then run monitor tool to view serial output:
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Run `idf.py -p PORT flash monitor` to build, flash and monitor the project.
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32s2/get-started/index.html) for full steps to configure and use ESP-IDF to build projects.
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## Example Output
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```
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I (0) cpu_start: Starting scheduler on APP CPU.
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I (303) example: Install temperature sensor, expected temp ranger range: 10~50 ℃
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I (303) temperature_sensor: Range [-10°C ~ 80°C], error < 1°C
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I (313) example: Enable temperature sensor
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I (323) example: Read temperature
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I (323) example: Temperature value 26.06 ℃
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I (1323) example: Temperature value 26.06 ℃
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I (2323) example: Temperature value 26.06 ℃
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I (3323) example: Temperature value 26.06 ℃
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I (4323) example: Temperature value 26.06 ℃
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I (5323) example: Temperature value 26.49 ℃
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```
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## Troubleshooting
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For any technical queries, please open an [issue](https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.
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