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by Daniel Wee
Mon 21 Sep 21 2020 5:21 pm
Forum: Projects
Topic: Power monitor
Replies: 6
Views: 10165

Re: Power monitor

This project is close to what we want.
https://primalcortex.wordpress.com/page/2/

It seems that the V3.0 board that I have uses the modbus protocol and not just the usual serial protocol.

https://www.arduino.cc/reference/en/lib ... s-esp8266/
by Daniel Wee
Mon 21 Sep 21 2020 5:17 pm
Forum: Projects
Topic: Power monitor
Replies: 6
Views: 10165

Re: Power monitor

Programming commands can be found in attached PDF
by Daniel Wee
Mon 21 Sep 21 2020 5:07 pm
Forum: Projects
Topic: Power monitor
Replies: 6
Views: 10165

Re: Power monitor

The main IC in the PZEM-004T is a "V9881D" energy measurement IC by Vango Tech. The CT inputs go to the IBN (pin 4) and IBP (pin 5) which is actually shorted together, and possibly referencing Vss as the other leg. These are the Input-B positive and negative channels - so why are they shorted togeth...
by Daniel Wee
Mon 21 Sep 21 2020 4:14 pm
Forum: Projects
Topic: Power monitor
Replies: 6
Views: 10165

Re: Power monitor

The SCT013-000 split core current transformer handles 0-100A with a maximum output of 50mA whereas the PZCT-02 has a maximum output of 100mA. Basically, for the SCT013-000 - 100A=50mA while for the PZCT-02 - 100A=100mA. This means we will probably need to recalibrate, or use a more suitable CT. The ...
by Daniel Wee
Mon 21 Sep 21 2020 4:02 pm
Forum: Projects
Topic: Power monitor
Replies: 6
Views: 10165

PZCT-02 Current transformer

Descriptions: This is a mini split base current transformer; it's the smallest one compared to the similar products (output 100MA). Fully enclosed, good mechanical properties and environmental resistance, strong voltage isolation capability, safety and reliability. Used for energy meter in special; ...
by Daniel Wee
Sun 20 Sep 20 2020 9:40 pm
Forum: Projects
Topic: Time series prediction
Replies: 8
Views: 6711

Re: Time series prediction

The sktime library also offers some useful tools that include auto-regressive predictions (multi-step recursive).
by Daniel Wee
Sun 20 Sep 20 2020 9:24 pm
Forum: Projects
Topic: Time series prediction
Replies: 8
Views: 6711

Re: Time series prediction

A good article on the various considerations on the prediction power of a neural model. https://www.kdnuggets.com/2019/05/machine-learning-time-series-forecasting.html https://www.kdnuggets.com/2020/03/machine-learning-time-series-forecasting-sequel.html Multi-variate time-series forecasting:- https...