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arendst / Tasmota

Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at
https://tasmota.github.io/docs
GNU General Public License v3.0
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HTU21 #96

Closed Greg2002 closed 7 years ago

Greg2002 commented 7 years ago

ver.3.9.20 20170221 I don't know why but HTU21 not works with I2C GPIO4,14 (BME280 and BH1750 - tested OK). (HTU21 sensor tested with Arduino 3.3V Sparkfun Library and works fine).

altelch commented 7 years ago

Whats the result of command I2Cscan? Is the sensor found?

arendst commented 7 years ago

My HTU21 works fine. Sometimes it needs a power cycle to reset itself after initial I2C configuration.

Greg2002 commented 7 years ago

I have a Si7021 sensor, not HTU21. With your library it will not work. I have an universal library from GitHub and it works fine with it. Thank you.

altelch commented 7 years ago

Might be related to the device id. I check for 0x32 as this is the device id returned by the htu21. The Si7021 seems to return 0x15. Please try to change this in the HTU21 driver and test again.

altelch commented 7 years ago

Added code in my fork. Please try: https://github.com/altelch/Sonoff-Tasmota.git If it works I'll do a pull request.

Greg2002 commented 7 years ago

It works but give wrong data of Humidity. HTU Temperature: 20.4°C HTU Humidity: -0.7% BMP Temperature: 21.2°C BMP Humidity: 30.6% BMP Pressure: 745.4 mmHg Illuminance: 102 lx This is due to wrong delay (HTU21 is faster). You can check a working library at https://github.com/enjoyneering/HTU21D

altelch commented 7 years ago

Changed delay to 23ms. Please try again with my fork. If it works I'll see how to "fix" this is a better way.

Greg2002 commented 7 years ago

HTU Temperature: 21.2°C HTU Humidity: 28.2% BMP Temperature: 21.5°C BMP Humidity: 27.2% BMP Pressure: 752.0 mmHg Illuminance: 105 lx OFF

Greg2002 commented 7 years ago

Now it works

altelch commented 7 years ago

Hi, could you please test again with my current code? Correct name should now be returned in logfile and the conversion times are set per sensor type.

Greg2002 commented 7 years ago

{"Time":"2017-02-27T15:28:30", "SI7021":{"Temperature":22.0, "Humidity":27.3}, "BME280":{"Temperature":21.4, "Humidity":27.4, "Pressure":755.0}, "BH1750":{"Illuminance":10}}

Greg2002 commented 7 years ago

But web server returns HTU HTU Temperature: 21.8°C HTU Humidity: 27.4% BMP Temperature: 21.7°C BMP Humidity: 26.8% BMP Pressure: 755.0 mmHg Illuminance: 11 lx OFF

altelch commented 7 years ago

Ok, web output should be fixed now. Please try again.

Greg2002 commented 7 years ago

OK SI7021 Temperature: 21.8°C SI7021 Humidity: 27.2% BMP Temperature: 21.9°C BMP Humidity: 26.6% BMP Pressure: 755.0 mmH

Greg2002 commented 7 years ago

You won!

altelch commented 7 years ago

Ok, will do pull request then.

Greg2002 commented 7 years ago

OK

Greg2002 commented 7 years ago

Today I received TSL2561 for testing instead of BH1750...

arendst commented 7 years ago

SI70xx is supported in version 3.9.22