Your Universal Remote Control Center
RS-232 & IP Control Forum - View Post
Up level
Up level
The following page was printed from


Original thread:
Post 86 made on Wednesday November 20, 2019 at 18:03
Lurking Member
November 2019
I have a 2017 Samsung QLED TV (QN75Q70RAF). Like lucastx, I'm having a terrible time trying to control the TV via Ex-Link. I can turn it on, but no other command is responsive. I'd love some help figuring out what I'm doing wrong. Details below:

Connectivity: 9600 baud, 8 bit, no parity, 1 stop bit, no hardware flow control

Service Mode settings:
RS-232 Jack: UART
EXT Link Support: ON
USB Serial: ON
Hotel/Hospitality Mode: Hospitality mode on or off makes no difference
Power-On command sequence: 0x08 0x22 0x00 0x00 0x00 0x02 0xd4
Power-Off command sequence: 0x08 0x22 0x00 0x00 0x00 0x01 0xd5

I also set RS-232 Jack to DEBUG, and received lots of console traffic at 115200 baud (normal for debug mode, but not normal "ON" mode), but it didn't respond to anything I tried to type. This tells me that my connection is good, at least for traffic *from* the TV.

I posted the same to the Samsung support community forum, but it doesn't look like that site gets much traffic and I haven't heard any replies.

Also, I sometimes get response codes from commands even though they don't work, but I haven't seen any docs on what those mean. If someone has those, that might help me solve my problem.

Thanks to Duct Tape and others for all the community support on this thread so far, and thanks in advance to anyone that might be able to get me unstuck.

Hosting Services by ipHouse