Details

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BUY SHT20 https://www.utsource.net/itm/p/6591456.html

Parameter	Symbol	Min	Typical	Max	Unit
Supply Voltage	VDD	2.1	-	3.6	V
Operating Current	IDD	-	0.5	4.0	μA
Measurement Time	tM	-	85	-	ms
Resolution	RH/T	-	12/14	-	bit/bit
Humidity Range	RH	0	-	100	%
Temperature Range	T	-40	-	125	°C

Instructions for SHT20

1. Power Supply:

   • Ensure the supply voltage (VDD) is within the range of 2.1V to 3.6V.

2. Initialization:

   • The sensor must be properly initialized using the I2C protocol before any measurements can be taken.

3. Measurement:

   • To measure temperature or humidity, send a start command followed by the appropriate measurement command.
   • Wait for the measurement time (tM) to complete before reading the data registers.

4. Data Readout:

   • After the measurement period, read the data from the sensor’s output registers.
   • Convert the raw data to actual temperature and humidity values using the provided conversion formulas in the datasheet.

5. Resolution Settings:

   • Adjust the resolution settings as needed using the user register. The default resolution is typically set to 12 bits for humidity and 14 bits for temperature.

6. Heater Function:

   • The SHT20 includes an optional heater function which can be activated via the user register for specific applications like self-calibration or condensation prevention.

7. Shutdown Mode:

   • When not taking measurements, the sensor can be put into a low-power shutdown mode to reduce power consumption.

8. Communication Protocol:

   • Ensure correct implementation of the I2C protocol for communication with the sensor, including proper handling of start conditions, stop conditions, and acknowledgment bits.

(For reference only)