Anyone know what SMC c02 works as in IDE web ?
this one? http://na.smc.com/product/carbon-monoxide-sensor-smcco02-z/
it is nominally zigbee but no mention of profile HA1.2 so you should expect it to be proprietary, SMC-only, and not compatible, so no device handler will work.
funny part# is carbon-MONOXIDE not co2.