Products > Test Equipment
Tonghui TH2830 LRC meter serial port, HOW ? BRAKE THRU, ALIVE
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oz2cpu:
great idea.. i rebooted many times, not a glitch that could look like a serial byte seen..

but i got a few ideas now, i will try to switch it into usb mode, and then back to serial, maybe it is stuck in odd configured state some how
Martin72:

--- Quote from: Martin72 on May 31, 2022, 10:13:55 pm ---Nevertheless, I could call the german support and ask them for the RS232 interface(not mentioned in the manual), would post the answer here.

--- End quote ---

I got an answer today.
Well...It won´t help a lot, but I tell it here.
The RS232 interface you can reach with the software ST4 and you can run SCPI commands via it.
Then they tell me to use a datacable with crossed connections (RX,TX) and obey the baudrate (9600 or 19200).
That was it from them, I can do some tests when we got our LCR back from calibration in the next week.
Martin
oz2cpu:
thanks a lot,
I only tried 9600 8n1 scpi mode
i crossed the signals,
verified with scope the tx signal is not connected to the other side tx, of course.

no reply on *idn?
and nothing come out in talk only mode

I also tried to wire all handshake signals as explained in the rs232c documentations found online
2-3 rx-tx
3-2 tx-rx
5-5 gnd
    on the TH2830 side i tried 4 to 6 and 7 to 8
    and also 1-4-6 , 7-8 connected together as suggested by many sites

still no luck, so i feel we need some one else to please try too, please folks ?
I had the idea so many people had this unit ? or the ST2830
Martin72:
In the answer, they told me also something I don´t understand:


--- Quote ---Pay attention to CR and LF when transmitting and receiving.
--- End quote ---

 :-//

Our ST2830 should arrive next tuesday/wednesday.
oz2cpu:
>Pay attention to CR and LF when transmitting and receiving.

dont we just love help like that ??
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