Simple test

Ensure your device works with this simple test.

examples/sht31d_simpletest.py
 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4import time
 5import board
 6import adafruit_sht31d
 7
 8# Create sensor object, communicating over the board's default I2C bus
 9i2c = board.I2C()  # uses board.SCL and board.SDA
10# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
11sensor = adafruit_sht31d.SHT31D(i2c)
12
13loopcount = 0
14while True:
15    print("\nTemperature: %0.1f C" % sensor.temperature)
16    print("Humidity: %0.1f %%" % sensor.relative_humidity)
17    loopcount += 1
18    time.sleep(2)
19    # every 10 passes turn on the heater for 1 second
20    if loopcount == 10:
21        loopcount = 0
22        sensor.heater = True
23        print("Sensor Heater status =", sensor.heater)
24        time.sleep(1)
25        sensor.heater = False
26        print("Sensor Heater status =", sensor.heater)

Simple Mode

Example in how to use the sensor in simple mode

examples/sht31d_simple_mode.py
 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4import board
 5import adafruit_sht31d
 6
 7# Create sensor object, communicating over the board's default I2C bus
 8i2c = board.I2C()  # uses board.SCL and board.SDA
 9# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
10sensor = adafruit_sht31d.SHT31D(i2c)
11
12print("\033[1mSensor\033[0m = SHT31-D")
13print("\033[1mSerial Number\033[0m = ", sensor.serial_number, "\n")
14
15for i in range(3):
16    if i == 0:
17        sensor.repeatability = adafruit_sht31d.REP_LOW
18        print("\033[1m\033[36mLow Repeatability:\033[0m\n")
19    if i == 1:
20        sensor.repeatability = adafruit_sht31d.REP_MED
21        print("\n\033[1m\033[36mMedium Repeatability:\033[0m\n")
22    if i == 2:
23        sensor.repeatability = adafruit_sht31d.REP_HIGH
24        sensor.clock_stretching = True
25        print("\n\033[1m\033[36mHigh Repeatability:\033[0m")
26        print("\033[1m\033[95mClock Stretching:\033[0m \033[92mEnabled\033[0m\n")
27    for itr in range(3):
28        print("\033[1mTemperature:\033[0m %0.3f ºC" % sensor.temperature)
29        print("\033[1mHumidity:\033[0m %0.2f %%" % sensor.relative_humidity, "\n")

Periodic Mode

Example in how to use the sensor in periodic mode

examples/sht31d_periodic_mode.py
 1# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 2# SPDX-License-Identifier: MIT
 3
 4import time
 5import board
 6import adafruit_sht31d
 7
 8# Create sensor object, communicating over the board's default I2C bus
 9i2c = board.I2C()  # uses board.SCL and board.SDA
10# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
11sensor = adafruit_sht31d.SHT31D(i2c)
12
13print("\033[1mSensor\033[0m = SHT31-D")
14print("\033[1mSerial Number\033[0m = ", sensor.serial_number, "\n")
15sensor.frequency = adafruit_sht31d.FREQUENCY_1
16sensor.mode = adafruit_sht31d.MODE_PERIODIC
17for i in range(3):
18    print("Please wait...", end="\r")
19    if i == 2:
20        sensor.heater = True
21    if i == 1:
22        time.sleep(4)
23        print("\033[91mCache half full.\033[0m")
24    else:
25        time.sleep(8)
26    if sensor.heater:
27        print("\033[1mHeater:\033[0m On    ")
28        sensor.heater = False
29    print("\033[1mTemperature:\033[0m ", sensor.temperature)
30    if not sensor.heater:
31        print("\033[1mHeater:\033[0m Off")
32    print("\033[1mHumidity:\033[0m ", sensor.relative_humidity, "\n")
33sensor.mode = adafruit_sht31d.MODE_SINGLE