Use of a CO2 sensor MH-Z19b

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

22.2k stars 4.81k forks source link

Use of a CO2 sensor MH-Z19b #1433

Closed FabianHM closed 6 years ago

FabianHM commented 6 years ago

With great interest I have read that the MH-Z19b is now also supported by Tasmota. I have currently two questions: Which pins of the device are needed, probably Vin; GND; TX. Is that correct? mh-z19b

The module can not be installed in a housing because of the sensors. Does anyone know a suitable housing, where above the board the module body could be freely installed?

Merry Christmas Fabian

arendst commented 6 years ago

You'll need Vin (5V!), Gnd, Rx and Tx.

FabianHM commented 6 years ago

Thanks

FabianHM commented 6 years ago

After I get my WeMos D1 and the MH-Z19B. I configured it as described, but I dont't get correct Informations. unbenannt

How can I check if it is a defective sensor or where the problem is?

arendst commented 6 years ago

Pls show the modules parameters page

FabianHM commented 6 years ago

I solved the problem In the example RX and TX were reversed. Correct is: settings

FabianHM commented 6 years ago

The display of CO2 works fine, but the temperature will always show in whole numbers. After the decimal place always a zero like XX.0 Please you can check it. Is this a "bug"? werte

spencer-at commented 6 years ago

hi,

can I use the MHZ19B sensor with a basic Sonoff or do I need a different hardware to run it?

stale[bot] commented 6 years ago

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

stale[bot] commented 6 years ago

This issue will be auto-closed because there hasn't been any activity for a few months. Feel free to open a new one if you still experience this problem.