Ok did some more tests and this is what I’ve found:
- TC66C Firmware upgraded from 1.13 to 1.14
- Now if I connect the TC66C directly to the C port of the Baseus your meter doesn’t turn on: Baseus <-> TC66C
— However if I use C to A and A to C adapters in the middle then it turns on: Baseus<USB C to A<>USB A to C<->TC66C. Why is this difference happening, is that the adapters modify something in the middle?
- If I connect the TC66C to the A port on the Baseus I need one A to C adapter and turns on again without load.
PROTOCOL DETECTION detects everything as green when connected to C port on the Baseus and battery is 24V. If I connect to A port it’s the same result but TYPE-C PC is red instead.
- When connecting TC66C or any other USB-C power meter, like Satechi or Plugable, directly to Baseus C port, power meters don’t power on until I connect some load like charging a phone. If disconnecting the load, the meter powers off again.
However, If I connect a USB-A meter like YZXstudio to the A port of the Baseus, it powers on immediately even with no load.
Doesn’t this make sense, since PD prevents from sending power until some specific bus data is received? Or power meters already send some signal so it should power or? I don’t have any other PD wall or car charger to test it so I don’t know how it should behave.
Now if I connect the TC66C directly to the C port of the Baseus your meter doesn’t turn on: Baseus <-> TC66C—- this is not charger and TC66C problem, this is PD charger feature, if you want it turn , please turn on our PD switch, it will turn on
Tried again connecting TC66C to C port of Baseus, but still doesn’t power on without load. Tested with buttons C and D of the meter in all 4 available positions but still doesn’t turn on.
Hi, I sent you the video to your PM. You can see how I connect the meter in all 4 available positions of the switches, and it never turns on witout load. With load, sometimes the meter screen powers on and others not, but always charges the load when connected. By the way, the car charger specific model is the Baseus BS-C20C, it’s written on the case.
Ok finally found how to turn on TC66C meter when it’s standalone connected to PD port of Baseus BS-C20C. You need C physical switch on (POWER) + D physical switch on (POWER DELIVERY) + AG virtual setting ON on Settings menu (CC line mode choice / PD SOFTSWITCH). The 3 are required enabled to turn on. I had the AG setting off thus didn’t turn on without load even with the other two on.
Hello again, I’ve found another issue with TC66C and Baseus BS-C20C:
Connect TC66C to Baseus in PROTOCOL DETECTION mode, then use a power supply to power the Baseus.
1- Set power supply to 13 vols and do protocol detection
2- When finished, increase power supply voltage from 13 to 24, with power supply still ON, do not disconnect voltage source.
3- Now when trying to perform protocol detection again the TC66C turns off and on again.
4- Same thing happens when lowering voltage from 24 to 13
5- Happens on both USB-A and USB-C port
6- Other Baseus car chargers that don’t have 20V output the issue does not happen.
I’ve not yet encountered the “Fail” message yet when updating the KM001, I’ve been able to update it a number of times already.
Does the KM001 that “Failed” work properly, except it does not want to update firmware?
Can you try changing a different micro-USB cable when you’re trying to update the firmware? (just guessing — it could be the USB connector does not properly connect with that specific KM001 meter maybe due to connector contact issue or something — or connect/reconnect a few times and try again)
Also, maybe try to do a Factory Reset on the meter (it’s in the last page of the Settings screen of the KM001 meter)
