Logging multiple units?

Test2

Hello,

I recently purchased the CT-2. It works well. I am very pleased with it.

I would like to use one PC to log data from 10 CT-2 units at the same time.
Can the KotomiApp do this?
If not, how can this be accomplished?
Can you expose a python library so that I can write my own scripts to handle the data?

yanke928

Yes, you can open multiple KotomiApps to different CT-2s.

If you're not satisfied with opening multiple apps, ask me for protocol.

Test2

May I please have the protocol?

yanke928

For reading current & voltage, sending "Get Meter Data" in ASCII to the virtual usart port. Baudrate can be anything. It will sends you back a data packet a couple of dozens of milliseconds later, with data structure:
    public class USBMeterData_t
    {
        [FieldOffset(0)]
        public float Voltage;
        [FieldOffset(4)]
        public float Current;
        [FieldOffset(8)]
        public float Power;
        [FieldOffset(12)]
        public float VolatgeDP;
        [FieldOffset(16)]
        public float VoltageDM;
    }

bobob1618

I wrote a program that can read the data in Python: https://gitlab.com/bobobo1618/kt001-reader/tree/master
It works perfectly on Linux, I haven't tried it on Mac or Windows but it should work there too.

It logs to a binary format right now but you can easily add CSV or JSON or something.