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This project consists of firmware to ease the monitoring of household electricity usage.
A simple C program for Arduino, which parses XML data from a Current Cost power meter & uploads to MQTT, PVOutput, Xively and Thingspeak.
This is now used to push data to Home Assistant via MQTT (https://home-assistant.io/)
- Current Cost 128 power monitor. http://www.currentcost.com/product-envi.html I got mine from: (http://www.smartnow.com.au/)
- NodeMCU. I got a nodeMCU from ebay. Less than $10. (http://nodemcu.com/index_en.html)
- Home made serial cable, RJ45->NodeMCU. Serial to D7 and D8 on the NodeMCU. Ensure that you send the 3.3v line to the EnviR
- This Git repo
GND - Blue Solid - RJ45 Pin 4 3.3v - Green Stripe - RJ45 Pin 1 TX - Brown - RJ45 Pin 8 RX - Brown Stripe - RJ45 Pin 7
Note: The latest version of the code has broken the HTTP submission for this build.
I used an Etherten from Freetronics for years. (http://www.freetronics.com/products/etherten) But seriously, why would you not get a NodeMCU.
Note: The latest version of the code has broken the HTTP submission for this build.
I attempted to use a hacked Current Cost network bridge as my Arduino. However I am not an expert at this and had mixed results. I got it sending data once but then it appears to hang. No serial or status LED's on the board makes diagnosing troublesome and I ended up giving up and just using my left over Etherten.
I uploaded code using an AVR programmer (the USBTiny ISP) and avrdude. The necessary settings are in the Makefile, so you can just run ino build && make burn.
I roughly followed these instructions to hack the bridge.
To program the bridge board:
- Uncomment "#define _BRIDGE"
- Bridge board - Bridge across jumper 1 to disable the Wiznet W5100 Ethernet chip
- Programmer (USBtinyISP) - ensure power is not supplied from this (https://learn.adafruit.com/usbtinyisp/use-it)
- Tools -> Board -> "Arduino Pro or Pro Mini"
- Tools -> Processor -> "ATmega328 (3.3v, 8 MHz)"
- Sketch -> Upload Using Programmer
- Bridge board - un bridge JP1 when done
SPI - http://playground.arduino.cc/Code/Spi TimeLib - http://playground.arduino.cc/Code/time
Add your ThingSpeak API key in the necessary place(s), modify ino.ini to reflect the Arduino you've
got, and run ino build && ino upload && ino serial.
You can also edit ~/.inorc to set your Ino preferences globally.
If you want to test your setup without parsing the data or uploading it to ThingSpeak you can build and run the project in the serial-test directory. Run ino build && ino upload && ino serial from the serial-test directory and you'll see the XML output from the meter (hopefully).
Code changed to send more information via MQTT. It reads every channel on every sensor, and sends it for each mqtt topic. Also sums the power from all channels and stores it in a MQTT topic.
Have look in auth.h and update with necessary information.
Summed value is uploaded to PVOUTPUT.
Arduino changes, stability, mqtt, pvoutput by Daniel Hyles.
Original which has been massively changed by Michael Sproul.
Based on original code by Brian Lee (bleep1) Based on original code by DotNetDann