2 hours ago
Hi everyone,
I want to share lessons learned with the community.
1. Kincony N30 works fantastically at my home, with ESPHome firmware, feeding data into Home Assistant.
2. I bought CT sensors on Kincony shop site, getting YMDC SCT013 20A/1V and 50A/1V. They are terminated with stereo minijacks. They all work.
3. I was not cutting mini-jacks off. Instead, I bought female mini-jacks and wired them to the headers from the N30 board. For me it was easier to connect everything.
3a. I had to upload new ARM firmware to get the readings.
Note 1: The Kincony app for that works on Windows only. Mac users can still use it from within a VM created by Broadcom's Fusion (there is free download).
Note 2: The Kincony app is named after N60 board, but it actually works with N30 as well.
4. 20A/1V CT sensors work correctly by default - enabling current, power and energy readouts.
5. 50A/1V CT sensors underreport current, power and energy.
6. Using external amperometer and some experimentations, I have achieved the following calibration co-efficiencs:
- Current: 0.8613
- Energy: 0.8601
- Power: 0.8562
and learned that co-efficients are actually applied as denominators. So the original values, that were underreported are DIVIDED by the co-efficients to get them right.
7. New Co-efficients work only after: setting new value, writing coefficient to the flash memory, then warm reboot (which reboots the ARM coprocessor).
Now all that works great!
I want to share lessons learned with the community.
1. Kincony N30 works fantastically at my home, with ESPHome firmware, feeding data into Home Assistant.
2. I bought CT sensors on Kincony shop site, getting YMDC SCT013 20A/1V and 50A/1V. They are terminated with stereo minijacks. They all work.
3. I was not cutting mini-jacks off. Instead, I bought female mini-jacks and wired them to the headers from the N30 board. For me it was easier to connect everything.
3a. I had to upload new ARM firmware to get the readings.
Note 1: The Kincony app for that works on Windows only. Mac users can still use it from within a VM created by Broadcom's Fusion (there is free download).
Note 2: The Kincony app is named after N60 board, but it actually works with N30 as well.
4. 20A/1V CT sensors work correctly by default - enabling current, power and energy readouts.
5. 50A/1V CT sensors underreport current, power and energy.
6. Using external amperometer and some experimentations, I have achieved the following calibration co-efficiencs:
- Current: 0.8613
- Energy: 0.8601
- Power: 0.8562
and learned that co-efficients are actually applied as denominators. So the original values, that were underreported are DIVIDED by the co-efficients to get them right.
7. New Co-efficients work only after: setting new value, writing coefficient to the flash memory, then warm reboot (which reboots the ARM coprocessor).
Now all that works great!