My cable is also a ch340g. I wonder how you find the cp2102?
If information what I find in russian forum are true then will be work. But I still don't know is this usb to ttl or usb rs232 or maybe to 485. Am on the way to find out now know u2 and gone check what is this. Also I ordered basic cord with cp2102. I gone try make right cabel. I let know soon as is possible...Inside my cord, the chip reads: WCH CH340G, and under that 202685403. Almost had to have a microscope to see that part. So you're saying that if I change this out for the cp2102 thing, then my dr. zx will work?
Can you read this element mark on photo?Inside my cord, the chip reads: WCH CH340G, and under that 202685403. Almost had to have a microscope to see that part. So you're saying that if I change this out for the cp2102 thing, then my dr. zx will work?
Hi later I will make complete photo of pcb. Maybe you help me. But this what I see the u2 is cross communication line from ch340g?is strange for voltage regulator?If I had to guess without seeing a complete picture of the board (both sides) I would say U2 is a VREG chip.. just because of the components near it, the cp2102 is a pretty generic usb to uart converter chip, tons of things use this and similar chips... the 2102 just has more support in the windows platform because of it's widespread use... however there are also tons of iterations of this chip with everybody and their chinese brother making a copy of it and some changing it just a wee bit... this is why sometimes an identical(looking) piece of hardware will not work like it's twin.
Ok thanks men. If you can look in your cabel and say what is there will be fine. I will wait for your replay. My cabel is real china clone with only cloned the names on ic'sI have a usb dr-zx laying around here somewhere... tomorrow I will pull it apart and see just what going on inside it, there's no better way to start a day than reverse engineering simple hardware
Ps. the 340 chip came out as a better/cheaper chip in the usb to uart series right after the first FTDI scandal but might still be lacking in the drivers department when it comes to windows usability.. not sure as I haven't had the need to research it lately.
This is chinees dual inverter SN74LVC2G04DBVR .Now we gone wait for Ronsii. He gone check what is inside his working cabel. Then maybe we find a problemThat part on mine is labeled CO45.
Is your clone works? I switched the tx with rx but not positive results. What is a label on your U2? Maybe the inverter is different? And what is your resistor on rx and rx? My is 100ohm.Yes szpryczek, the dr-ex I found here is similar to yours with the 340G uart chip and yes the 6 pin chip is a dual inverter/level chip : #1 d0,#2GND,#3D1,#4D2,#5VCC,#6D3
Have you tried to switch #1-3 on the four pin DR-EX connector to the machine? the reason I mention this is I have seen many clone type electronics get the tx/rx switched....
Can anyone give information, links, or downloads on using DrZX scan tool. Looking for info on computer version. Where does the usb cord assembly plug into on the excavator. Where can you obtain information relating to how to understand the scan tool results or output. Any help would be appreciated.