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README.md	add supported target to ESP32-S2 Temperature Sensor Example	2020-07-06 19:05:44 +08:00

README.md

Supported Targets	ESP32-S2

ESP32-S2 Temperature Sensor Example

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.

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.

DAC level	offset	measure range(℃)	measure error(℃)
0	-2	50 ~ 125	< 3
1	-1	20 ~ 100	< 2
2	0	-10 ~ 80	< 1
3	1	-30 ~ 50	< 2
4	2	-40 ~ 20	< 3

Log output :

I (243) TempSensor: Initializing Temperature sensor
I (243) TempSensor: default dac 2, clk_div 6
I (243) TempSensor: Config temperature range [-10°C ~ 80°C], error < 1°C
I (253) TempSensor: Temperature sensor started
I (1253) TempSensor: Temperature out celsius 27.287399°C
I (2253) TempSensor: Temperature out celsius 26.848801°C
I (3253) TempSensor: Temperature out celsius 26.848801°C
I (4253) TempSensor: Temperature out celsius 27.287399°C
I (5253) TempSensor: Temperature out celsius 27.287399°C