Domoticz Community Forum - Support & Discussion

I have a ADC voltage-value from a ShellyUNI which must be converted to a CO2-value (CO2 = 200 * ADC-value). How can this be done?

As you don't know Lua you better start with Dzvents.
Look for example to this topic where someone has something similar. https://www.domoticz.com/forum/viewtopic.php?t=33414

Converted to a CO2 value, a CarbonDioxide value?

Hi @HoogendoornJH,

As the Shelly Uni is able to send the ADC value to MQTT topic "shellies/shellyuni-ID-Number/adc/0, I would send it to Node-RED and multiply the value with 200. The result can be easily send with MQTT to Domoticz.

Or use DzVents and multiply it there as Waltervl said.

Regards

HvdW wrote: Wednesday 14 February 2024 20:42 Converted to a CO2 value, a CarbonDioxide value?

He probably has a CO2 measuring device hooked up to the Shelly ADC (Analog DC) input. So a certain voltage level defines a certain CO2 level.

waltervl wrote: Wednesday 14 February 2024 16:52 As you don't know Lua you better start with Dzvents.
Look for example to this topic where someone has something similar. https://www.domoticz.com/forum/viewtopic.php?t=33414

This works. Thanks a lot, waltervl.