update readme

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Glyn Hudson 2016-09-24 12:36:18 +01:00
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**Low power wireless temperature and humidity node**
V2.0 hardware revision adds support for SI7021 temperature and humidity. This sensor brings performance and power savings over the DHT22, see `sensor_test` folder of this repo for sensor evaluation and comparison.
V2.0 hardware revision adds support for SI7021 temperature and humidity. This sensor brings performance and power savings over the DHT22, see `sensor_test` folder of this repo for sensor evaluation and comparison.
- BLOG POST
- FORUM POST
### Related Blog Posts
- [Optical Pulse Counting with emonTH](https://blog.openenergymonitor.org/2015/09/optical-pulse-counting-with-emonth/)
- [emonTH V1 Prototype](https://blog.openenergymonitor.org/2013/06/emonth-prototype/)
- [emonTH V1 Hardware Design](https://blog.openenergymonitor.org/2013/10/emonth-update-hardware/)
- [emonTH V1 Software & Power Optimise](https://blog.openenergymonitor.org/2013/10/emonth-update-software-power/)
- [emonTH Battery Choice Considerations](https://blog.openenergymonitor.org/2013/10/aa-battery-considerations/)
### Related Forum Posts
- [HTU21D Temperature and Humidity sensor, possible DHT22 replacement?](https://community.openenergymonitor.org/t/htu21d-temperature-and-humidity-sensor-possible-dht22-replacement/1106/21)
# Firmware