M30 configure yaml for ESPhome

[pawelb]

I've done calibration but it does not work. Still damn wrong readings...

[roflas]

I've done calibration but it does not work. Still damn wrong readings...

Sad to hear.

Does anybody here was able to get correct readings or people just install it and do not even check, what it shows?

[admin]

take a video how you did, send to whatsapp number: +86-15381188302 we help you.

[pawelb]

Can you send me modbus registry map? Maybe address are incorrect or smth.

What video do you mean?

[admin]

video: i want to see how you connect with wire and CT sensor and which CT sensor you are using.
here is M30 data structure and modbus pull screen photo.
   
   
   
   
3 address with 100,200,300 they are 3 different BL0910 chip.
these data read from RS485 BL0910 chip, it's RAW data.

[pawelb]

I can't record a video at the moment because my installation is now hardwired into the junction box. However, I’ve included a picture of the CT clamp that I additionally used for testing on separate circuits. As mentioned earlier, I received a replacement from the seller — not just a new CT clamp, but an entire Kincony M30 meter — and it gives the same measurements. It's strange, since the chip is supposed to provide values close to the actual ones.

[admin]

this CT sensor is not from KinCony, make sure it's 2000:1. Because we have encountered several similar situations before, after use KinCony's CT sensor, it become work well, so make sure your CT sensor is suitable.

[pawelb]

Damn, you're right, I showed the wrong clamp. I have three for testing – one random from AliExpress and the 10A one sent by the seller together with the new M30, as instructed by your support. But I can’t take a photo now because I’m away for two weeks. I’ll definitely follow up on this after that.

[admin]

ok, you can test with kincony's CT sensor.

[roflas]

Hello,

I did some testing as you asked and sending you some info. Results are really bad to be honest and I do not see any relation in them. If you cannot help to get claimed results, I would like to return it. I already spent so much time with it....

My ESPHome configuration is in my previous message on 06-11-2025 in this topic.

I tested two devices, two resistive loads: water heater and hot air gun. Results are very awkward.

My setup:
https://ibb.co/vnQFkWH
https://ibb.co/mFd39KWq

Water heater current measurement:
https://ibb.co/2Q6QC7b
https://ibb.co/GQ2JsKbr

https://ibb.co/qM7PmG3V
https://ibb.co/5xXFV33b
Water heater current measured by M30 is on average 9.2 - 9.25A, while multimeter and athom smartplug measure almost idential at 8.99A - 9.00A. This is a significant difference compared to claimed. However, this is not the worst part as the worst part is with lower currents. See below.

Hot air gun measurement:
https://ibb.co/S4ZjXfkf
https://ibb.co/WpFX2gH7

https://ibb.co/dJjZ5xxb
https://ibb.co/1GzWFjFj

Results are 4.89A with multimeter and 4.87A with Athom smart plug. Measurements are basically identical as with water heater. However, M30 measures 4.16A! That is almost 15% off....

I am not really sure what happens here as other tools show readings as expected. These resistive loads should not be disturbed by PF and I know that athom plug does account for that.

I really see this device as hardly usable at the moment. I would rather by 30 units of PZEM-016 for that kind of price.

Thanks