Reading a ClampMeter which uses Silicon Labs CP2102 USB to UART Bridge

[Dennis_Knutson]

You are right. That manual is of no use. Have you tried contacting them? Using the sniffer is not going to be easy. Does their program provide for control as well as reading? If you posted details on what the display shows and what the exact data the sniffer reports, it might be possible to determine how to convert the hex bytes to actual numeric.

[jetsdream]

Hello,

I found some time to do some testing and I can provide some Screenshoots while sniffing the serial data of the device. please find them attached. Does that make any sense? the clampmeter on the right hand side and the according table is the actual application provided by the manufacturer. The serial sniffer can be seen in the background with the received data on the lefthandside.

Any hints would be awesome.

Regards,

Jan

[Hernexto]

Hi,

   I know this topic is 1 year old, but my 2 cents...

   I think my Mastech 2115B (MS2115B) is quite similar (not stetically though) maybe it helps somebody...

Software:

Above captured data saved to disk:

Most probably data saved to disk has the same binary format as on the COM port (with the exception of the DATE+TIME)

The record format would be something like shown on the PCLink table, but with the DATE+TIME at the beginning of the record, maybe in EPOCH format (seconds since 1970).

It should be not dificult to decode.

Addendum:

- (MAYBE) To receive data you must start the application so it initializes the communication, close it. (otherwise you just receive 'ff ff ff ff ff'...) (??? not sure about this)

- Once initialized this is what I see (I supposed 2400bpx 81N):

That data corresponds to something like this: