DHT20 I2C Humidity Sensor support

mczemek · October 20, 2021, 12:48pm

There is support for the DHT series with OneWire interface but has there been firmware support for the DHT series Grove with I2C interface such as the DHT-20? The Grove DHT series with OneWire is End Of Life.

dht(pin,module_type) only supports the OneWire and I2C are private functions in the library.

cyclicalobsessive · October 20, 2021, 1:19pm

Is this what you are looking for? DHT with I²C

github.com

DexterInd/DI_Sensors/blob/master/Python/di_sensors/easy_temp_hum_press.py

# https://www.dexterindustries.com
#
# Copyright (c) 2018 Dexter Industries
# Released under the MIT license (http://choosealicense.com/licenses/mit/).
# For more information see https://github.com/DexterInd/DI_Sensors/blob/master/LICENSE.md
#

# EASIER WRAPPERS FOR:
# IMU SENSOR,
# LIGHT AND COLOR SENSOR
# TEMPERATURE, HUMIDITY and PRESSURE SENSOR

# MUTEX SUPPORT WHEN NEEDED


from di_sensors import temp_hum_press
from time import sleep

from di_sensors.easy_mutex import ifMutexAcquire, ifMutexRelease

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mczemek · October 20, 2021, 2:07pm

That appears to be code for the GoPiGo3 not the GrovePi+. “di_sensors” is not in the standard GrovePi modules as far as I can tell.

cyclicalobsessive · October 20, 2021, 2:27pm

Right, missed that.

Put your question to the official support now: support@modrobotics.com

jimrh · October 20, 2021, 4:32pm

But don’t forget to bring the answer back here so others can learn too.

Maybe @cleoqc would care to comment?

cyclicalobsessive · October 20, 2021, 4:54pm

Actually the readme says it it is for grovepi, so perhaps try the install for Di_sensors and then try passing “I2C” for the port to that “GoPiGo3 Example” - it might just work!

mczemek · October 20, 2021, 5:25pm

You are correct. The installation in the readme does install the di_sensor modules. I have verified the modules do get included for GrovePi compile. I have not tested the code yet. I will update when I have. McZ

cleoqc · October 21, 2021, 2:38pm

What’s in di_sensors will work with all of the Dexter products.
However the DHT sensor is not in there. The code is for the THP sensor

As far as I know there isn’t an out of the box support for the DHT 20. Sorry.