Yes already opened port 22 in my router but still doesn't work. Same result trying SSH tunnel..
Now I'm running out of ideas, too. 
You could go to a friend, and try to connect at his/here router setup.
You could join an internet security forum, and ask for SSH help there.
If nothing helps, buy a second RPi, if you only have one now.
are you suggesting pl 2023 chip?
please give me a link at least please.
This is what I bought at Amazon Germany: TTL-to-RS232 converter
Suddenly it's started to work :S, i am not sure what was the problem.
But most of the time i need to send same command few times to work.
See, that's why. You will have a stable connection, if you follow my suggestion.
Maybe the SSH port has been blocked somehow by your router. Check the port settings of your router.
And/or you can try SSH tunneling: SSH Tunnel with PuTTY
PS: I'm pretty sure it will work with a fresh image. A reason for broken SSH could be a LibreELEC update that doesn't update the SSH configuration correctly (maybe the root user ID changed in LibreELEC, but didn't changed at SSH configuration).
Again Connection refused :_(
Weird. I would reinstall LibreELEC by using a fresh SD card image.
Lets assume the static IP of your RPi is 192.168.0.5.
It's important that you are a "root" user if you try to connect. If you are not "root", then SSH will refuse the connection, because only "root" is defined for login by default. I had the same "issue" 
.
I bought a USB to RS232 converter to control my marantz amp via rpi3.
Don't do this. You will run into USB driver issues on RPi3. Use a TTL-to-RS232 converter (at GPIO RX/TX). It's cheap, and you will find a lot of manuals how to connect and test that converter. There are small versions that you can mount in your RPi3 case.
Also: Is overclocking useful if I plan to watch Netflix on the RPi?
It should work by default with 720p, but Netflix with 1080p needs overclocking.
I have now bought the Nvidia Shield. And as stated before I can confirm that DTS is working fine with my setup on the Nvidia Shield.
But I now have another problem...
When I start Netflix from my LG Smart TV app, I get Dolby Digital sound passthrough to my receiver.
However... When I open Netflix on Nvidia Shield and play the exact same video, I don't get Dolby Digital 5.1 ...
Anyone knows why?
Congrats for your DTS setup with the Shield! 
For Netflix 5.1 your TV may be the weak part, according to this. That Nvidia forum will be the right place for your next questions.
I enjoyed the conversation. Good luck!
#0 0x76f31b64 in memcmp () from /usr/lib/libarmmem.so
Could indicate bad RAM. Test the RAM.
Q1: Is it possible that my TV can only passthrough Dolby Digital?
Q2: If the Wetek Core can passthrough DTS while directly connected to receiver, wouldn't it be able to do that when connected to TV instead? Because it can do that for Dolby Digital.
Heavy questions, and I actually don't know.
Generally, the TV shouldn't care about what kind of audio data are passed through to the receiver. So, my guess to Q1 is: No.
I belief Q2 is about two processing steps. Step one is decoding A/V material. Your Wetek Core does this step fine, and leads the DTS audio to SPDIF. Step two is merging A/V to create an HDMI stream. I think DTS has more data to merge, compared to Dolby Digital. So, Wetek Core maybe fails here due to less processing speed.
Yes my settings are exactly the same.
I'm don't have "sync playback to display" enabled.
If the Kodi settings are the same, then I guess it's a hardware issue. Maybe DTS needs to merge more data into the HDMI stream (it works un-synced on the Shield only), and only a strong SOC like the Shield's Tegra X1 can handle it.
Yes, I mean like this setup:
Wetek Core - - > HDMI - - > TV
TV - - > SPDIF - - > RECEIVER
Dolby Digital works fine, but not DTS.
If you still have an optical SPDIF cable at your Wetek Core, plug it off to avoid double transmission (maybe deactivate it on the settings, too). According to the YT video (see above), DTS seems to be a tricky standard. Maybe the Wetek Core can't play it, but the Shield can.
I have now been trying/troubleshooting for 2-3hours, and I can't get the TV to passthrough DTS.
It seems to work fine with Dolby Digital passthrough, but not DTS.
You mean your Wetek Core box?
PS: To make it crystal clear: There is no need to go optical from every box to the receiver. HDMI does the same thing, it's just passed through the TV.
Yes, usually that should work. But I havent got it to work on my LG TV with my Wetek Core.
I have an LG EG9100 OLED TV
... or am I doing something wrong?
The Shield should be the replacement of your Wetek Core box. The Shield is, to my knowledge, the best streaming box on the market. Of course you can use both boxes on your TV. Two boxes, two HDMI cables to the TV. The described signal chain will stay untouched (working fine for my Raspi 3B+ setup, I just don't use DTS material).
