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27 lines
1.3 KiB
Markdown
27 lines
1.3 KiB
Markdown
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# ESP32-S2 Temperature Sensor Example
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The ESP32-S2 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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* Log output :
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```
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I (243) TempSensor: Initializing Temperature sensor
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I (243) TempSensor: default dac 2, clk_div 6
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I (243) TempSensor: Config temperature range [-10°C ~ 80°C], error < 1°C
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I (253) TempSensor: Temperature sensor started
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I (1253) TempSensor: Temperature out celsius 27.287399°C
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I (2253) TempSensor: Temperature out celsius 26.848801°C
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I (3253) TempSensor: Temperature out celsius 26.848801°C
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I (4253) TempSensor: Temperature out celsius 27.287399°C
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I (5253) TempSensor: Temperature out celsius 27.287399°C
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```
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