USB Tester Calibration Issues: Keweisi/Kowsi MX-18/MX-18L 

The chip type: PY32F002A

Excellent video!!! Thanks a lot!

amazing !! finally mine is calibrated thank you very much

Thanks broo.. So details

Well played bro

Which volt tester would you recommend us? Thank you for the video

suwun mas 🙏🏾

Can you Instructions for making a separate power source for this USB to measure voltage below 3v ?

its freezing/blank (only backlight) when plugin to power adapter or wall adapter. but working fine with powerbank, usb laptop, & otg.

How do I calibrate the KWS-2301?😊

Hello, you need to do a calibration on the usb input when the tester is disassembled, plus and minus when you connect it and then it will show accurately, because the tester takes on a little consumption and shows an inaccurate voltage, I haven’t found such information anywhere, so I’ll write it, otherwise I did it calibration as you do and the value on the power supplies shows not only after my calibration it will show correctly and accurately

Mine locks up when charging device is connected. It is KOWSI MX-18L V2.1. Open circuit, It works OK and can be voltage calibrated. However, after connecting a device the display locks up and cannot be changed with the button or increasing/decreasing input voltage. If a device is connected on power-up, the screen is frozen white. Any idea how to get past this problem or do a full reset? There are gold pads marked V,D,C,G for probing.

I have this model, I find it quite useless as it always freezes after being plugged in after some time and needs to be replugged in every time.

Bro, can You make a tutorial for making a DIY power supply like yours?

Sir this usb test can check resistant ?

Yg Mana kw, kowsi atau keweisi