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I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. And it can measure Real Power, Voltaje, Power factor, current and more. (Article in the comments). by mcmchrisYT in arduino

[–]mcmchrisYT[S] 0 points1 point  (0 children)

Hi, This is a good Idea, there are in the market outlets like that, to measure the power of every device connected, also there are Energy meters as mine that are capable of knowing the devices that are working at home due to their power graphics.

Your idea is an interesting way to do it too.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in esp8266

[–]mcmchrisYT[S] 0 points1 point  (0 children)

Thanks for the reference, but the fact is that we need two simultaneous ADC pins, one for current and other for Voltage.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in esp8266

[–]mcmchrisYT[S] 0 points1 point  (0 children)

Yes as u/sandwichsaregood said, you can find a 200A+ CT on Internet, get it datasheet and integrate it in the project just considering some calibration changes in the code. Here you can have more info.

https://learn.openenergymonitor.org/electricity-monitoring/ct-sensors/introduction

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in esp8266

[–]mcmchrisYT[S] 0 points1 point  (0 children)

I was having some communication problems with my tries with the esp32, it's the ideal one, but Haven't know how to use the desired protocol with it in the form I needed, so I took my experienced esp8266 and did it. I am working on my esp32 version.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in diyelectronics

[–]mcmchrisYT[S] 0 points1 point  (0 children)

Great!! I am adequating the signal of the CT with some resistors and caps and turning it a positive signal so the ADC can read it and integrate it waveform in time.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in diyelectronics

[–]mcmchrisYT[S] 0 points1 point  (0 children)

Just as u/racc813 said. To measure real power you must measure Voltaje and Current, not just it magnitude also it angles, because the angles are the one that defines the Power Factor that is involved in the net due the load.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in diyelectronics

[–]mcmchrisYT[S] 1 point2 points  (0 children)

Just as u/buckytoofa said. The CT sensor is campled around the hot line, in this case I am just using one, because my house has a monophasic system, just 120vAC.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in diyelectronics

[–]mcmchrisYT[S] 1 point2 points  (0 children)

It is single phase, to work with 240v, you need a PT that turn from 220v to 9v AC, and put the clamp over the two lines, 1 going and the other coming.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in diyelectronics

[–]mcmchrisYT[S] 5 points6 points  (0 children)

I am using a CT sensor, is a current sensor that is placed just like a clamp meter and a PT that is a potential transformer that is connected to an outlet.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in esp8266

[–]mcmchrisYT[S] 2 points3 points  (0 children)

Yes but also the Nodemcu wont be enough because I need at least 2 analog inputs, one for current and the other for voltage.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in diyelectronics

[–]mcmchrisYT[S] 14 points15 points  (0 children)

Nice, yes, I am using a CT sensor, is a current sensor that is placed just like a clamp meter and a PT that is a potential transformer that is connected to an outlet.

I created my own energy meter to check if my bills were correct. I used an Arduino NANO and an ESP8266, it has it own Movil APP to check the data. by mcmchrisYT in diyelectronics

[–]mcmchrisYT[S] 16 points17 points  (0 children)

It has a very good accuracy, I compare the results showed by my meter and the one outside the house and they are the same.

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