Blog index 2022 Apr 12 Chip Shortage & Hardware Development Update 2019 Oct 01 Cydynni emonCMS dashboard on display May 25 Introducing emonDC 2018 Nov 08 2018 Development Review Nov 08 Demand Side Response Development Jan 30 Emoncms Blue Theme Jan 26 emonPi Remote Access with Dataplicity 2017 Oct 25 Introducing IoTaWatt Aug 07 CydYnni – Energy Local, community hydro smart grid Aug 01 Advances Wales Magazine Article Jun 22 Emoncms Android App V2 Jun 21 emonPi Network Setup Wizard May 18 Raspberry Pi blog May 05 emonPi as a Home Automation Hub Feb 21 MyHomeEnergyPlanner - open source home energy assessment Feb 14 Launching Learn: Sustainable Energy Jan 31 New home page and Learn website! Jan 04 OpenEVSE EV Charge Controller 2016 Sep 29 Introducing emonTH V2 Sep 01 Summer Placement Aug 12 EcoHome Lab: From Monitoring to Control Jul 26 HTU21D / Si72021 Temperature and Humidity Sensor Jun 29 Part 3/3: Continuous Deployment (Over-The-Air Update to ESP8266) Jun 25 Emoncms Docker Jun 20 ESP8266 WIFI developments Jun 14 Part 2/3: Firmware Continuous Test & Build Jun 12 Part 1/3: PlatformIO open-source embedded development ecosystem Jun 03 Electrical Supply Line Fault May 20 Substantial update to emonPi / emonBase: emonSD-03-May16 pre-built image release May 13 emonPi / emonBase Raspberry Pi 3 May 11 Emoncms android App QR Code Scanner Setup May 03 New Forum, Blog and User Guide Website May 02 Part 3: Aggregated supply and demand across multiple households Apr 28 Part 2: Exploring carbon intensity and renewable energy matching Apr 27 Part 1: Attempting to measure and understand the CO2 intensity of grid electricity Apr 18 GitHub Submodules Apr 01 Home Assistant and emonPi Mar 17 Raspberry Pi 3 Feb 29 Outdoor Temperature Data from Weather Underground to Emoncms & MQTT Feb 17 Heat pump Testing: Initial results Jan 01 Low carbon energy film featuring OpenEnergyMonitor 2015 Dec 24 Heatpumps in the ZeroCarbonBritain model by the Centre for Alternative Technology. Dec 18 Heat pump Monitoring Dec 17 Emoncms android App Dec 13 OpenEnergyMonitor, emonPi and openHAB Dec 10 North Wales Tech Meetup Presentations Nov 26 Remote Control of LightWave RF plugs via MQTT using emonPi with OOK Tx Nov 21 UK Grid Carbon Intensity API Nov 15 Node-RED Emoncms Node Nov 11 OpenEnergyMonitor November 2015 - Overview Presentation Nov 04 Interpreting Emoncms Dashboards Nov 04 Ambient Wind Energy Indicator using Node-RED and Blink(1) USB Oct 12 emonPi, NodeRed and MQTT Sep 21 China Shenzhen Electronic Market & HopeRF Factory Visit Sep 09 Using emonPi Offline: How to setup a WIFI Hotspot on an emonPi Sep 06 Pulse counting with the RFM69PI and RaspberryPi EmonBase basestation Sep 04 At Watt Cost? A review of the emonPi Raspberry Pi based energy monitor Sep 02 Optical pulse counting with the EmonTH Aug 22 3CH WiFi Relay Control Board Aug 02 Understanding zero carbon energy systems: Energy storage (part 1) Jul 30 New MyElectric Emoncms app, realtime power graph and energy totals Jul 09 Adding a RTC to the emonPi Jul 06 What is the embodied energy of a microcontroller? Jul 05 Open Source Circular Economy OSCEdays - emonPi Embodied Energy Jul 04 Open source hourly zero carbon energy model, combining traditional electric, heating and electric vehicle demand. Jul 02 Hourly energy model example 6: Electric vehicles and a renewable energy supply Jul 02 Improved my solar application specific dashboard for tablet energy display's Jun 29 Using a tablet as a wall mount energy display Jun 26 OpenEMC - An emonTH mod for woodworkers Jun 22 Hourly energy model example 5: Simple space heating model with heatpump's powered by renewable energy Jun 19 Optical Utility Meter LED Pulse Sensor Jun 18 Hourly energy model example 4: Complementarity of different renewable generating technologies Jun 14 Hourly energy model example 3: Variable supply and traditional electricity demand Jun 12 Hourly energy model example 2: Variable supply and flat demand (python code included) Jun 11 Hourly energy model example 1: Variable Supply Jun 10 Modelling hourly demand and supply for renewable powered domestic electricity, heating with heatpumps and electric vehicles Jun 06 EmonTx v2.5 and throughhole kits Jun 01 Investigating the embodied energy of the EmonPi & OSCEDays London 12-14th June. May 11 Introducing emonTH V1.5 Apr 11 emonPi Vs emonTx V3 Comparison Apr 03 Introducing emonPi: Raspberry Pi based energy monitor Mar 19 Energy Display Options... Feb 27 Real World emonTH Battery Life Feb 23 RFM69CW Power Consumption Feb 10 Introducing RFM69Pi V3 Raspberry Pi Expansion Board Feb 06 An open source hourly zero carbon energy system model Feb 03 Pre-built heatpump dashboards 2014 Dec 17 Introducing emonTx V3.4 Dec 08 Kettle vs Blanket Dec 08 Introducing RFM69CW Nov 22 Research Project Call for Participants Nov 21 Snowdonia household energy study, exploring zero carbon solutions Oct 25 Testing KiCad PCB Oct 24 Emonhub installation/update, replacing the PHP raspberrypi emoncms module Sep 11 From the Forum: Using Modbus RS485 to read a SDM630M 3-phase meter Aug 26 A right to build: An open approach to housing provision: self-provision Aug 06 Monitoring SolarPV, Heatpump and house electric, EmonTx v2 system upgrade example Aug 01 Pebble Smart Watch Emoncms Heating Control Demo Aug 01 Android Tasker & Pebble Smartwatch - Emoncms Notifications Jul 10 How CT Sensors are Made... Jul 07 Reducing emoncms write load and a minimal python version of emoncms Jul 03 emonGLCD V2 SMT Development Jun 19 Emoncms time-series feed engine documentation Jun 06 emonPi Raspberry Pi Energy Monitoring Shield - Prototype Dev Update Jun 03 How to draw a myelectric style bar chart Jun 03 Gwynedd Council Award 2014 Jun 01 How to build an Energy Monitoring android App part 1 Jun 01 Hardware Developments - Update Jun 01 Emoncms Mobile View (My Electric) May 24 Development update: EmonHub, Emoncms&MQTT, Application guides May 21 ZeroCarbonBritain: Report in short May 15 Elektrocamp, visiting Jerome in Bordeaux and OuiShare Mar 12 emonTx V3 Antenna Testing Mar 07 Direct connection emonTx V3 > Raspberry Pi GPIO Mar 03 Emoncms developments and calculating wh totals on the emontx Feb 13 We've made the local newspaper! Feb 04 Pebble Smart Watch Emoncms Display & Heating Control - Dev Jan 26 OEM Gateway: Serial Port > Emoncms Link Jan 18 emonTH Multiple DS18B20 Sensors Jan 07 We Won! Daily Post Business Award 2013 - Green Award Category 2013 Dec 28 Tutorial on how to create an emoncms module Dec 27 Developing for Arduino remotely on a Raspberry Pi Dec 26 Emoncms control developments and demo's Dec 15 Emoncms (early) Heating Control Demo Dec 09 emonTx Family Tree Dec 03 emonTx V3 AC Adapter Socket Error Dec 01 Setup Emoncms on a RaspberryPI with a Hard drive Nov 27 Adding control to emoncms: RFM12b Packet Generator Nov 27 2013 Christmas Ordering Info - Royal Mail Last Posting Dates for Delivery before Christmas Nov 24 New hardware is in the shop and starting to ship this week Nov 18 Hardware Manufacture Begins! Part 2: emonTx V3 and emonTx Arduino Shield SMT Nov 17 Hardware Manufacture Begins! Part 1: emonTH Temperature and Humidity Node Nov 12 Documentation highlight: Application guides Nov 11 Documentation highlight: Solar PV power diversion PLL Nov 08 Improving emoncms performance with Redis plus interesting consequences for SD cards. Nov 04 Bulk SD Card Loading Oct 31 New office space and new hardware units Oct 22 Raspberry Pi - A new type of RAM Oct 18 emonTH Update - Software and Power Consumption Oct 18 emonTH Update - Hardware Oct 18 AA Battery Considerations Oct 15 CarbonCoop & OpenEnergyMonitor build weekend, November 16 & 17th Oct 01 Website Backup Sep 30 Backing up your raspberrypi emoncms or emoncms.org account Sep 25 RaspberryPI: SD Cards, HDD, Gateway Forwarder Sep 20 Measuring building thermal performance - coheating tests Sep 16 Faire Maus! A 'fair' USB optical mouse Sep 13 Posting data from Adafruit Tweet-A-Watt to emoncms Aug 31 emonTx V3 Progress Update Aug 26 emonGLCD 433 / 868 Mhz RF Scanner & Signal Strength Meter Aug 20 Notify on inactive feeds Aug 06 PCB Manufacturer Meeting Aug 05 Ethical and Sustainable Electronics Aug 01 Preparing emoncms.org feeds for conversion to timestore Jul 31 From 1.3 minutes to 196ms: timestore on emoncms.org Jul 29 OEM Gateway by Jerome Lafréchoux Jul 29 EmonTx Shield SMT progress Jul 26 DIY Casing Jul 25 Ciseco SRF and RFM12B Power Consumption Investigation Jul 24 New Oscilloscope - RFM12B Power Consumption Jul 22 Emoncms powered by timestore Jul 11 Great emoncms dashboards by Paul Reed, Jürgen and Tom + update on backup Jul 09 A new backup system for emoncms.org Jul 07 Probably the best student placement opportunity ever!? developing an open energy management system at the Center for Alternative Technology Jul 04 More direct file storage research Jul 04 In memory storage: PHP shared memory vs Redis vs MYSQL Jun 28 Load stat's for MYISAM vs INNODB for feed storage on the RaspberryPI Jun 27 Rethinking the data input and storage core of emoncms: benchmarks Jun 25 Idea for using redis in-memory database to improve emoncms performance Jun 24 Building Energy Modelling: A simple javascript model Jun 24 emonTH Prototype Jun 23 Building Energy Modelling: Ventilation and infiltration Jun 20 How much energy does it take to heat a simple cube house? Jun 18 Building Energy Modelling part 3 - Carbon Coop and Open Source SAP 2012 Jun 18 Fridge Defrosting Jun 17 Building Energy Modelling part 2 - First attempts and research Jun 17 Building Energy Modelling part 1 - The Whole House Book Jun 14 Carbon Coop and Houseahedron meetup Jun 10 Getting the Air Quality Egg to work with the OpenEnergyMonitor system and emoncms Jun 10 What kind of information can we extract from power measurements? Jun 06 Emontx Shield SMT with new layout in development Jun 05 Removing redundant datapoints – algorithm 1 Jun 04 Removing redundant datapoints - part 1 Jun 03 Timestore timeseries database May 31 The current emoncms feed storage implementation May 30 Emoncms.org load stats May 29 Recent commits to emoncms May 28 Emoncms.org backup May 27 12 input pulse counter idea May 25 Continuation of emontx testing - feed comparison tool May 25 Testing DS18B20 temperature sensing on emonTx v3 May 17 Open Source Hardware Users Group (OSHUG) #26 Meetup May 13 One Year of Solar PV Monitoring May 03 Carbon Coop Apr 26 Introducing the RFM12Pi V2 - Raspberry Pi Wireless Expansion Board Apr 17 Pictures from the OpenEnergyMonitor CAT course Mar 02 Course at the Centre for Alternative Technology Feb 10 emonTx SMT update > Introducing emonTx V3 Feb 09 Ideas for improving the emoncms framework Feb 09 Air Quality Egg Sensor Shield Feb 09 Air Quality Egg Jan 31 Power emonTx from single AC power supply - Part 2 bench testing 2012 Dec 29 A big thank you to everyone Dec 24 Tax and Season's Greetings... Dec 11 OpenEnergyMonitor Meetup Dec 04 RFM12B Wireless Transmission Explained Dec 03 Public and private feeds Dec 03 Multiple multigraphs Nov 29 OpenEnergyMonitor Shop Christmas Ordering Nov 29 OpenEnergyMonitor meetup Nov 24 Solar PV excess power into immersion water heater using emonTx, emonGLCD & MKII triac code - in development Nov 14 Queuing packets on the basestation and bulk sending to emoncms Nov 08 Raspberry Pi emonBase Nov 07 Updated installation and upgrade guides for latest emoncms release Nov 01 Ciseco Visit Oct 31 Pre-assembled Nanode RF Oct 30 Emoncms development update: Modules Oct 23 Introducing the emonTx Shield Sep 27 Display live emoncms energy data on your desktop Sep 27 Logo Ideas Sep 25 Data portability: Version 1 complete! Sep 21 Data portability: Importing feed data into emoncms Sep 19 Data portability: exporting feed data from emoncms Sep 19 Data portability challenges Sep 18 Making emoncms data portable Sep 18 Cleanweb UK Sep 04 EmonTx and NanodeRF Code guides Sep 04 Cleanweb UK - Ignite Evening - London 13th Sep Aug 27 Reading Watt-hour data from an Elster A100C electricity meter using IrDA by Dave Berkeley part 2 Aug 09 Open Kontrol Gateway - emonBase Aug 08 emonTx SMT - Progress Update Aug 04 Overload Protection of Mains Electrical Circuits by Robert Wall Aug 02 Plug and play sensor nodes Aug 02 Low-level ADC control: ADMUX Aug 01 Configurable single to 3-phase interrupt based EmonTX code by Pcunha Jul 29 EmonGLCD Template based display's Jul 28 Reading Watt-hour data from an Elster A100C electricity meter using IrDA by Dave Berkeley Jul 27 EmonGLCD Icons by Drsdre Jul 26 Almost at the next emoncms release point Jul 26 Open source sailing technology to clean up oil spills Jul 17 emonGLCD V1.4 Jul 16 Triac based MK2 PV Controller by Calypso Rye Jun 18 Single AC power supply + voltage sensing Jun 04 Getting visual Jun 01 Arduino Leonardo (ATmega32U4) and RFM12B Jun 01 High Accuracy Current Measurement Over a Wide Range May 30 Installing emoncms on a raspberry pi May 27 emonTx single AC power supply - Part 1 Simulation May 26 View your power data as a histogram in emoncms May 25 Visualisation API May 25 Measurement of heat loss in a hot water cylinder May 24 Measuring heat flux in and out of a hot water cylinder May 19 Emoncms multilingual support May 13 emonGLCD Solar PV PWM LED Proportional Indication May 09 Embodied Energy of Electronic Enclosure Materials Apr 22 Engineers thermometer Apr 18 A short video of OpenEnergyMonitor Labs Apr 16 Faulty Batch of MCP1702 Voltage Regulators Apr 14 elektro:camp(«2012.05») Workshop | Offenburg-Germany Apr 12 Speeding up emoncms feed data requests Apr 12 emonGLCD V1.3 Switches - fix! Apr 11 Open source hardware and the free rider dilemna Mar 31 Heat Pump Monitoring Mar 29 OpenEnergyMonitor Shop is open! Feb 28 emonGLCD V1.3 PCB Feb 21 Documentation reorganisation proposal Feb 18 New emoncms features part 2 - Email notifier Feb 18 New emoncms features part 1: blue message bar Jan 28 Community Energy Plan maker Jan 18 University campus energy monitoring in France Jan 17 emonGLCD - getting time for the internet Jan 14 Full web-connected home energy monitoring system 2011 Dec 26 Solar PV Monitoring Dec 24 New emonTx PCB Dec 19 How to contribute on OpenEnergyMonitor dev + development plans Dec 17 How to move feed data between servers Dec 16 Open source and software as a service Dec 10 Nomination: Open source internet of things award Dec 08 Essence of open source Dec 08 AC-AC Adapters Dec 07 Emoncms v3 beta Nov 24 Ubuntu podcast Interview Nov 11 HomeCamp4 Presentation Video Oct 31 Home Camp 4 presentation slides Oct 21 Home camp 4: London 29th-30th Oct Sep 18 Introducing Megni Sep 01 Nanode up in the mountains Aug 31 Not all USB power supplies are created the same Aug 07 Nanode Applications weekend Aug 07 RFM12B Simple RF Transmission Demo Jul 12 Project development Jun 24 Cheap AC transformers are no good Jun 12 Twitter age May 16 How we envisage emonTx being used May 15 emonTx feedback form May 15 Meet the emonTx May 05 Snowdonia build April 2011 Apr 28 Snowdonia build 2 Apr 24 Onawi - Open renewables Apr 01 Should we change to drupal based forums? Mar 31 Ken Boak's Nanode project Mar 19 The free charge controller project Mar 19 Cool projects: Humblefacture Mar 12 Emoncms alpha is up!! Mar 04 Sustainable Energy and OpenEnergyMonitor development Mar 02 Sparkfun tutorial: Solder stenciling Mar 02 MakerBot's Bre Pettis on Entrepreneur.com Mar 02 Limor Fried:one of the most influential Women in Technology 2010 Mar 01 The mighty Ladyada on Entrepreneur.com Feb 10 Definition of open-source hardware Feb 06 A few tips from DIY Drones Jan 20 A great talk by Saul Griffith on energy Jan 13 RF communication and wireless display Jan 02 A battery powered wireless energy monitor sensor node. Jan 01 Rearranging builds upon Jan 01 PCB's 2010 Dec 31 PCB Designs in development Dec 21 Sampler 2.0 Dec 20 Kirikou: an open electricity monitor Dec 11 Networked Arduino's Dec 11 Temperature Sensing using DS18B20 Digital Sensors Dec 11 Build a multiple input pulse counter Dec 11 Arduino sleep mode Dec 10 PCB Experiments Dec 08 Using JQuery AJAX and php to fetch data from a mysql database Dec 03 High resolution ADC and Arduino Oct 10 Energy monitoring at the CAT - part 4 Oct 10 Energy monitoring at the Center for Alternative Technology - part 3 Oct 10 Energy monitoring at the Center for Alternative Technology - part 2 Oct 09 Energy monitoring at the Center for Alternative Technology - part 1 Aug 29 Networked Arduino's and PV monitoring weekend Aug 02 Appliance Inference Jul 31 Nuelectronics ethernet shield simple client library Jul 30 Reading from pulse output kWh meters Jul 23 Alan Meany's Ambient Knowledge Jun 30 Project Update Jun 14 Solar hot water controller Apr 29 All Power Labs Apr 11 ArduinoComm code simplified Apr 07 Mains AC: non-invasive version 3.0 up Apr 07 Mission Science Workshop Project Mar 18 Maker Faire, How to build an energy monitor guide Mar 18 Reducing noise, adding a capacitor Mar 11 Application Notes Mar 10 Maker Faire Newcastle Feb 15 ArduinoPower - ADE7753 Feb 03 Forums!! Feb 02 Calibration Jan 28 Documentation finished Jan 27 Arduino Ethernet Shield + perl + mysql + Flot based graphing Jan 26 Xbee documentation Jan 23 Display documentation Jan 22 USB pen data logger documentation Jan 21 Main documentation page started Jan 21 Measurement board documentation Jan 13 Finished, working, functional home energy monitor! 2009 Oct 22 Micro Maker Fair Wales Oct 09 7 segment display and more internet stuff Oct 05 Pachube Oct 04 Internet connectivity and xbee wireless - what a day! Sep 03 Hall effect sensor circuit diagram Sep 02 Experiments with a hall effect current sensor Aug 25 OpenCO2Monitor collaboration Aug 19 36 hours of house electrical energy use monitoring Aug 14 Measuring DC electrical energy production from micro-renewables Aug 05 Measuring AC mains energy use the non-invasive current transformer method - part 2 Aug 04 Printable one page project description Jul 26 Update on progress and a revised aim Jun 25 Software improvement and examples Jun 22 A start on DC current sensing Jun 06 Non invasive current sensing method Jun 01 Welcome!
Jul 04 Open source hourly zero carbon energy model, combining traditional electric, heating and electric vehicle demand.
Jun 22 Hourly energy model example 5: Simple space heating model with heatpump's powered by renewable energy
Jun 10 Modelling hourly demand and supply for renewable powered domestic electricity, heating with heatpumps and electric vehicles
Jul 07 Probably the best student placement opportunity ever!? developing an open energy management system at the Center for Alternative Technology
Nov 24 Solar PV excess power into immersion water heater using emonTx, emonGLCD & MKII triac code - in development
Aug 27 Reading Watt-hour data from an Elster A100C electricity meter using IrDA by Dave Berkeley part 2