The emonTH V2 is an open-source, wireless, battery-powered temperature and humidity monitoring node.
The emonTH V2 features a Silicon Labs Si7021 temperature and humidity sensor instead of the DHT22 sensor. The Si7021 is more accurate and significantly (2000 times!) lower power then the DHT22. This will result in an increase in the emonTH battery life; from 10 months to several years. The Si7021 is also much smaller than the DHT22.
The Si7021 sensor can be seen in the top right-hand corner of the PCB. The white film on top of the sensor is a dust film and should not be removed. The dust film is factory fitted and will protect the sensor from dust and air contaminants.
As with all our hardware units the emonTH V2 is fully open-source and manufactured locally in North Wales, UK using non-conflict materials lead-free processes.Read on →