Dowload surplusmeter how to#
You should now see two columns of values. print(Irms*230.0) // Apparent power Serial.
Dowload surplusmeter serial#
The Arduino converts the raw data from its analog input into human readable values, then sends them to the serial port monitor.Ī) Download EmonLib from github and place it in your Arduino libraries folder.ī) Upload the "current only" example: #include "EmonLib.h" // Include Emon LibraryĮmon1.current(1, 111.1) // Current: input pin, calibration.ĭouble Irms = emon1.calcIrms(1480) // Calculate Irms only Serial.
Dowload surplusmeter software#
The sketch is the software that runs on the Arduino.
CT Sensors - Interfacing with an ArduinoĪssemble the components per the diagram above.The monitor consists of the current sensor (which produces a signal proportional to the mains current) and the sensor electronics that convert the signal into a form the Arduino can use.įor a circuit diagram and detailed discussion of sensors and electronics see: Here's how to build it: Step 1: Gather Componentsġ x Burden resistor 18 Ohms if supply voltage is 3.3V, or 33 Ohms if supply voltage is 5VĢ x 10k Ohm resistors (or any equal value resistor pair up to 470k Ohm)Ī breadboard and some single core wire. Although not as accurate as a monitor that measures voltage as well as current, it is a method commonly used in commercially available whole house energy monitors for reasons of simplicity and cost.
It measures current, but uses an assumed fixed value for voltage (230V, if you're in the UK) and calculates apparent power. This guide details how to build a simple energy monitor on a breadboard that can be used to measure how much electrical energy you use in your home. Edit How to Build an Arduino Energy Monitor - Measuring Mains Current Only
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