V1.5 is a minor hardware update adds support for RFM69CW radio and includes a DIP -switch which allows setting four RF node ID's (19-22) easily and quickly. See emonTH wiki for updated documentation
emonTH V1.5 with DT22 Temperature and Humidity SensoremonTH V1.5 with RF node ID DIP switch and RFM69CW
My friend Tommy has designed a tidy camper van conversion kit for a Citroen Berlingo or Peugeot Partner MPV. The kits are made in North Wales. The conversion kits are well thought out and will make for a perfect weekend climbing camper van setup at a reasonable price.
It is no secret that there is much similarity between the two units, both are cut from the same cloth. Both units use the same ATmega328 Arduino IDE compatible microcontroller and front-end CT channel signal processing which gives identical monitoring accuracy.
The emonPi is most suitable over the emonTx V3 for home or small business whole circuit energy monitoring and also solar PV where Ethernet or WIFI can reach the consumer unit. Being a one-box-solution and with its status LCD the emonPi is quick and simple to install and maintain.
For larger systems where there could be multiple transmitter nodes and more channels to be monitored the emonTx V3 could be most suitable. The emonTx V3 transmits it's readings via RF (433Mhz) to an emonBase web-connected base station (Raspberry Pi + RFM69Pi). Multiple emonTx V3's can be used with a single emonBase
The emonTx V3 has the edge over the emonPi when it comes to powering the unit, the emonTx V3 can be powered directly from the AC-AC adapter while also taking an AC voltage waveform sample. Due to the higher power requirements of the Raspberry Pi the emonPi requires an additional 5V DC USB adapter.
Struggling to decide? It's also worth noting that the emonPi and emonTx V3 can work together. emonPi by default also functions as an emonBase; as well as local monitoring the emonPi can receive data via RF from multiple emonTx V3 and other remote nodes such as emonTH temperature and humidity room node.
For further details of the units see the Technical Wiki documentation pages.
emonPi Raspberry Pi based energy monitor Kickstarter
It's an exciting time for us; this week (on the 1st April, unfortunate timing!) we launched a Kickstarter crowd funding campaign for our emonPi Raspberry Pi based energy monitoring unit.
The emonPi has been in development for the past 12 months or so, if you have been lurking on the forums you have probably seen activity on the emonPi's open development forum thread. Thank you everyone who contributed.
The emonPi has been developed with input from the community, merging the monitoring unit and web-connected base station into a single easy to install and setup energy monitoring solution.
The emonPi is fully open source hardware and software. It's been designed for maximum hackability and customisation being built on a fusion of two popular open source hardware platforms Arduino and Raspberry Pi.
emonPi Technical Features
- Two channel CT monitoring with AC sample input
- Compatible with Raspberry Pi model A, model B, model B+ and Pi 2
- Arduino compatible ATmega328 with ability to remotely upload sketches vis Raspberry Pi Serial
- RJ45 DS18B20 on-wire temperature bus to allow many temperature sensors to easily be added using a RJ45 breakout board for heat pump monitoring applications
- PWM and IRQ I/O's on RJ45
- Status LCD with function push button
- Raspberry Pi shutdown button
- RFM12B / RFM69CW with SMA antenna to receive or transmit data from other sensor nodes
- Option to add OOK (on-off keying) transmitter footprint for controlling remote plugs etc.
- Option to add EEPROM to enable Raspberry Pi HAT compatibility (please get in contact if you have experience setting up Linux device tree).
- Open-source hardware, firmware and software
- High quality custom made, wall mountable enclosure
We had fun filming a Kickstarter promo video, demonstrating some applications of the emonPi, Emoncms and the OpenEnergyMonitor system installed around where we are based in the mountain of North Wales, UK.
Here's a video showing the emonPi installed and talking through how setup will work in practice. Having the LCD to show local IP address, status and uptime etc will no doubt make the system much more user friendly and accessible.
The Kickstarter will be running until Apr 20 2015 9:46 PM BST, if we haven't reach our funding goal by then we will get nothing! Please help us share and spread the word :-)
Please help us by sharing our Kickstarter page with interested parties
We believe the opportunities and benefits of taking an open-source approach to smart monitoring and control challenges are significant; we hope to encourage others to start projects & businesses that also work towards a zero carbon future in an open way.