UN40EH5000G - Garbage on serial

[jchennales]

Hi, I recently bought a UN40EH5000G LED TV in Argentina. The TV openly advertised "RS232" control so I started searching and found the forum. I built the RS232 exlink cable but all I get is garbage, not without patterns, like 80 repeating chars etc but garbage at last. Attached is the full log of what I did and two putty logs of the serial link when powering on and off the tv. I am not sure what could be wrong with the cable except maybe mixing Rx/Tx but if I had done that I'd get no output at all, right?

If anyone has any ideas please help. Thank you!!

[thwalker3]

Did you ever get an answer to this?
Have a UN46ES7500 and the same problems. Playing around with various serial settings but no luck so far...

[juusso]

then problem can be wrong connection parameters (e.g. speed and other).

[thwalker3]

I've tried every "standard" rate from 2400 to 115200 without luck. Didn't try odd stop and parity bit settings or anything yet. I can definitely see patterns in the ouput during "normal" usage indicating it is trying to print some regular output and I do see significantly more output when booting or "doing something" so I'm not sure what is wrong.

How well/poorly is are the 'E' series supported? Managed to get my fw images unpacked and can look around at least but I don't really want to try fiddling with those without a functioning console so that I can see what I'm doing though.

I have a fair amount of experience with embedded linux (in particular arm) so this should be simple
Must be missing something obvious.

[E3V3A]

If anyone has any ideas please help. Thank you!!

You're not really giving enough information, regarding your settings. But it sound like you have some noise problems or a close but not correct speed and/or parity. A good way to test your cable is by shorting your Tx/Rx on the far end of your exlink cable. If you get this working, then you know its a problem with your settings and not hardware.

[jchennales]

Hi Everyone,

Sorry for the late response on my part. I've been away and when I came back I could not immediately get back to this.

So, I thought that the idea about shorting the Tx-Rx on the far end of the cable was good, so I did this just now and able to get the characters I type back.

I did this by covering both ring and the tip of the stereo miniplug with copper cable and opened the COM port with puttytel with local echo disabled. I got the "hardwired" echo ok. Just to make sure it was not a software echo I removed the copper wire and then I got nothing back, validating the whole test.

So, the cable seems to work ok. I agree that it is likely a wrong setting with speed/parity but, like thwalker3, I've tried all the standard ones. Anyone has this working on a EH5000? If so, can you please post your COM settings?

If there is any other test to be done let me know!

Thank you!

[vuhothang]

Same with me. FTDI USB-Serial test Tx-short-RX character display on putty when i press keyboard. But when connect with UA32EH4003rxxv only garbage character on putty, test with 9600, 56700, 115200, 128000, 1,none,8,none.

I want access to Top Debug Menu and change region

Someone help me with model!

[jchennales]

Hi everyone,

Ok, a lot of time went by without any news. I decided to try a USB-Serial adapter since most discussions deal with that and not a direct serial connection. I bought the following on dx.com:

PL2303HX Converter USB to TTL USB to COM Cable Module- Black (1m)
http://dx.com/p/pl2303hx-converter-usb- ... wJfYoXYMuQ

I connected the cables as instructed (Black cable: GND; Green cable: TXD; White cable: RXD), opened PuTTY on serial at 115200 bps (rest of options default) and got a good reading this time!
See attached the log for turning the TV on, waiting a while, and then off.

Now I need to find if there is any way I can get the remote presses to show up in the serial link, that is my prime objective. If anyone wants to point me in the right direction that would be nice (no, I did not do a thorough search yer, just got it connected )

Bye!