USB power meter/tester thread - YZXStudio, Power-Z, RDTech and more.

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RD tech
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did you solve the problem by turning on both switch

If you have any interest in USB tester or power supply, please contact me
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xnode wrote:
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.

you are professional

If you have any interest in USB tester or power supply, please contact me
this is my shop on Aliexpress: https://rdtech.aliexpress.com/store/923042

xnode
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RD tech wrote:
you are professional

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.

bunrieu
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Hi guys,

Has anyone ever successfully upgraded the firmware on a Power Z KM001 or KM001C? o

I have been using this to do some capacity tests and whenever I connect to the PC software to start a graph. I am promoted to update.

Any help would be greatly appreciated. Great device but a horribly translated manual.

d_t_a
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bunrieu wrote:
Hi guys,

Has anyone ever successfully upgraded the firmware on a Power Z KM001 or KM001C? o

I have been using this to do some capacity tests and whenever I connect to the PC software to start a graph. I am promoted to update.

Any help would be greatly appreciated. Great device but a horribly translated manual.

Latest firmware version (as per using the Power-Z app to do a firmware update "Check"

Change Log  copied from the App's info box (translated via Google Translate):

Quote:

POWER-Z (Seiko) QQclub: 68821762
Designed by ChargerLab
Hardware information: KINGMETER KM001
Firmware version: V1.4.4
Update Date: 2020.04.24
1. Fix the crash bug of the previous version.
PS: When "error reading device information" appears, please click "upgrade software" in the lower right corner of the app to download the latest version

Power-Z App v1.4.5  including the v1.4.4 (2020/04/24) firmware

https://kingmeter-1255476733.cos.ap-guangzhou.myqcloud.com/Power-Z.zip

 

v1.4.4 changelog from readme file (translated via Google Translate)

Quote:
Added high-power PPS for Xiaomi 65W charging and Black Shark 65W charger to read correctly

 

Click the "Firmware Update" tab:

 

 

Then click the "Check", which will then show this screen.

Select the correct firmware (for KM001 or KM001C, depending on your device), then click "Upgrade"

bunrieu
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Awesome, Thank you @d_t_a

Very similar to what I was trying but for some reason your link above works (at least for one of my KM001’s)

I actually have two and the other is still showing “Fail” on screen when attempting the upgrade. Regardless i’m happy with one updated, cheers.

https://imgur.com/a/VL18PyM

d_t_a
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bunrieu wrote:
Awesome, Thank you @d_t_a

Very similar to what I was trying but for some reason your link above works (at least for one of my KM001’s)

I actually have two and the other is still showing “Fail” on screen when attempting the upgrade. Regardless i’m happy with one updated, cheers.

!https://imgur.com/a/VL18PyM!

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)

Hope some of the above suggestions might work.

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d_t_a wrote:
bunrieu wrote:
Awesome, Thank you @d_t_a

Very similar to what I was trying but for some reason your link above works (at least for one of my KM001’s)

I actually have two and the other is still showing “Fail” on screen when attempting the upgrade. Regardless i’m happy with one updated, cheers.

!https://imgur.com/a/VL18PyM!

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)

Hope some of the above suggestions might work.

Thanks for the suggestions, I went back and gave it a go but still getting a failed on the update unfortunately. One will have to do me for now.

xnode
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How can I know if my YZXstudio ZY1270 has bluetooth or not?
If not, how can I connect it using microUSB to pc to read serial data? Any help for Windows, macOS or Linux would really help.

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xnode wrote:
How can I know if my YZXstudio ZY1270 has bluetooth or not? If not, how can I connect it using microUSB to pc to read serial data? Any help for Windows, macOS or Linux would really help.

To see if it has Bluetooth or not look at the back of the main PCB of the unit, it should have pogo pins that connect to a smaller blue board that has a zigzag copper trace on it (which serves as the antenna), that’s the Bluetooth chip.

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will34 wrote:
xnode wrote:
How can I know if my YZXstudio ZY1270 has bluetooth or not? If not, how can I connect it using microUSB to pc to read serial data? Any help for Windows, macOS or Linux would really help.

To see if it has Bluetooth or not look at the back of the main PCB of the unit, it should have pogo pins that connect to a smaller blue board that has a zigzag copper trace on it (which serves as the antenna), that’s the Bluetooth chip.


Ok what I did is to remove the screws at the back of the YZXstudio ZY1270 with a PH00 screwdriver. In fact there were only 3 on them, one missing, and were barely loose. One of the copper cylindrical separators was a little bit unscrewed, so tightened it up, in case the bluetooth module pins (they are retractable) didn’t touch the pads. Set the serial update to 1 seconds and no bluetooth device is found by the smartphone right away, but if I use “hcitool scan” on linux it does find the “SPP-CA” device instantly. For the device to be found on the Galaxy S10 it takes about 40 seconds to find it and you have to press “Scan” twice on bt settings, so if you are eager you may think it’s not working.

Now what’s left is how to read the data from either the smartphone or Linux or Windows. Do I have to pair the bluetooth device or does the app just have a device selector? How can I do it?

EDITED: found how to do it. You have to pair the smartphone to “SPP-CA” with PIN 1234. Then I used the app Serial Bluetooth Terminal from Kai Morich. Then click on menu – Devices and choose the paired device. Then on Terminal tab click on connect icon and that’s it, will output the time, voltage and amperage. It has option to save, share and Log. Probably the way to save everything is to enable “Log”, otherwise after a while toasts the error:
Hint: Receive buffer truncated. Try ‘Settings -> Receive -> Buffer size’

You can click home button on phone to open other apps and it will continue working in the background.

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Yeah that’s how Smile , then the values are saved on a txt file which you can export to excel and transform to proper V and Ah numbers.

xnode
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will34 wrote:
Yeah that’s how Smile , then the values are saved on a txt file which you can export to excel and transform to proper V and Ah numbers.

The Ah are not very reliable, specially if voltage fluctuates a lot, say you use quick charge and moves from 5 volts to 9 volts. You must use Wh, I presume you have to go adding up, since the meter does not output that value.
What you have is to divide Wh by desired voltage, say 3.7 volts or whatever, then you get flat Ah.
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From my experience, even if you use a long interval like 10s the resulting Ah total from the sum of Amp readings will be within <5% of the real capacity value from the meter itself. Same goes for Wh. This method works unless the device being measured drops in and out of QC, but this rarely happens.

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Is it possible to read serial data of YZXstudio ZY1270 over microUSB cable and not only bluetooth? So I can read from computer. I would like to do that because I get BT disconnect after a while, and I want to log for several hours. Looks like bluetooth connection is very weak and you have to keep the smartphone very next to meter. I’ve contacted f-t-2000 seller but no answer. No idea if he’s already present on eBay.

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Finally got the bluetooth connection with the YZXstudio ZY1270 working for hours. You just have to put the meter and the phone very close (less than half a meter) because connection is so weak.

I have another question: what is the purpose of the micro-usb input of the ZY1270? I’m trying to use it as external power for the meter, but for some reason it sends power to the output, and it’s also counted in statistics. Is the female micro-usb in this case just another input like the male USB-A? Can’t be used int he same way as TC66C?

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What’s the difference between ZY1270 and ZY1280? Does the latest have bluetooth option?

d_t_a
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xnode wrote:
What’s the difference between ZY1270 and ZY1280? Does the latest have bluetooth option?

I think there’s quite a number of generations that went from 1270 to 1280.

here’s a features chart for 1270 to 1276. The 1280 basically has all features of the 1276, and then adds some more (like min/max, a micro-USB HID external port, more resolution, etc) (the translation is not so well done…)

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xnode wrote:
What’s the difference between ZY1270 and ZY1280? Does the latest have bluetooth option?

Compare my reviews of them:

https://lygte-info.dk/review/usbMeter%20YZXStudio%20ZY1270%20UK.html
https://lygte-info.dk/review/usbMeter%20YZXStudio%20ZY1280%20UK.html

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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HKJ wrote:
Compare my reviews of them:

https://lygte-info.dk/review/usbMeter%20YZXStudio%20ZY1270%20UK.html
https://lygte-info.dk/review/usbMeter%20YZXStudio%20ZY1280%20UK.html


No mention to datalogging methods with practical examples.
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xnode wrote:
HKJ wrote:
Compare my reviews of them:

https://lygte-info.dk/review/usbMeter%20YZXStudio%20ZY1270%20UK.html
https://lygte-info.dk/review/usbMeter%20YZXStudio%20ZY1280%20UK.html


No mention to datalogging methods with practical examples.

I did show these two examples:


Albeit the second one was not done by me.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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HKJ wrote:
I did show these two examples:


Albeit the second one was not done by me.


Still not satisfied with the answer. Does the ZY1280 have bluetooth? Is it an extra or all models have it?
HKJ
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xnode wrote:
Still not satisfied with the answer. Does the ZY1280 have bluetooth? Is it an extra or all models have it?

The model I reviewed to not have Bluetooth, the backplate with the Bluetooth module is missing.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

d_t_a
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Checking the official YZXStudio website (Taobao, in Chinese), it seems there’s a slightly upgraded ZY1280M model:

https://item.taobao.com/item.htm?id=38401794937

(courtesy of Google Translate)

Quote:

Table comparison of various models:

ZY1280M: Add 2Msps high frequency ripple oscilloscope and frequency meter on the basis of 1280, 2.5W built-in load, compatible with MTKPE test, test line resistance free load mode, low current mode.

ZY1280: USB2.0 interface, including all the functions of 1276, newly added USB upgrade, connected to a computer upper computer, large screen and many functions.

ZY1276: USB2.0 interface, with almost full-featured fast charge trigger detection function, higher current resolution, and can test Type-C PD adapter.

ZY1275: Ultra-high current Huawei 8A plug socket, total internal resistance is only 15 milliohms, with almost full-featured fast charge trigger detection function, and can test Type-C PD adapters.

ZY1273: USB3.0 interface, necessary to test USB3.0 equipment, support VOOC, DASH fast charge, with 1 TypeC interface, can test USB to Type-C line resistance.

ZY1272: USB2.0 interface, no other measuring line interface, with safety monitoring function, with over-voltage, over-current, under-voltage, and stop charging after full.

ZY1271: USB2.0 high current interface, with 2 TypeC interfaces and MicroUSB interface, can measure bidirectional PD voltage and current, can measure Huawei 5V5A, large screen.

ZY1270: USB2.0 high-current interface, dual USB output ports, with MicroUSB interface, with accelerated charging function, can test Huawei 5V5A, large screen.

ZY1266: A black-and-white USB meter with higher cost performance, with the same accuracy as the 127x series

ZY1265: A black-and-white USB meter with higher cost performance than ZY1266, with the same current accuracy but a lower voltage accuracy.

xnode
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HKJ wrote:
xnode wrote:
Still not satisfied with the answer. Does the ZY1280 have bluetooth? Is it an extra or all models have it?

The model I reviewed to not have Bluetooth, the backplate with the Bluetooth module is missing.


So how do yo datalog, using micro-USB interface?
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xnode wrote:
So how do yo datalog, using micro-USB interface?

Using the connector marked PC

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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RD tech wrote:
you are professional

Bough from your store on Aliexpress The HD35, and have a suggestion for you: the USB-C port is too much close to USB-A port, can’t connect any USB-C meter like TC66C directly to it, because touches the port. Could you please for future revisions put it more separated and with more angle so I can fit RD TC66C, Satechi USB-C or Plugable power meters? It would look something like this:

Original:

Request:

Same would apply to LD 35 and others. Some USB-C meter are quite wide:

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xnode wrote:
RD tech wrote:
you are professional

Bough from your store on Aliexpress The HD35, and have a suggestion for you: the USB-C port is too much close to USB-A port, can’t connect any USB-C meter like TC66C directly to it, because touches the port.

Or you could use a small extender, like this:
https://www.amazon.com/Extender-Cellularize-Lifeproof-Otterbox-Nintendo/...
d_t_a
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Pete7874 wrote:
xnode wrote:
RD tech wrote:
you are professional
Bough from your store on Aliexpress The HD35, and have a suggestion for you: the USB-C port is too much close to USB-A port, can’t connect any USB-C meter like TC66C directly to it, because touches the port.
Or you could use a small extender, like this: https://www.amazon.com/Extender-Cellularize-Lifeproof-Otterbox-Nintendo/...

Extender may add some amount of resistance.

Some time before, I bought an adapter that allows interchanging with the various types of USB (mini-USB, micro-USB, lightning, etc). So I can try mixing and matching when testing some stuff. But when I do some measurements, they do add quite a fair bit of resistance (ie. current or voltage may not be that correct measurement anymore).. Although the adapter I used could have higher resistances…

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d_t_a wrote:

Or you could use a small extender

Extender may add some amount of resistance.

Some time before, I bought an adapter that allows interchanging with the various types of USB (mini-USB, micro-USB, lightning, etc). So I can try mixing and matching when testing some stuff. But when I do some measurements, they do add quite a fair bit of resistance (ie. current or voltage may not be that correct measurement anymore).. Although the adapter I used could have higher resistances…


Of course, even the meter will add a little bit of resistance. You can measure the extender resistance first with and then without it. But it would be great if you could connect directly from point A to point B.

The too close ports is something than happens even on computers. Old MacBooks 13” had way too close ports, and even in 17.3 MSI notebooks ports are close enough that if you connect USB-A meter on one port it already partially blocks the next one.

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