The header (in this case the AA) is not part of the checksum calculation, only the Command+ID+Data Length+Data1 (Data value) are part of the checksum calculation. If the checksum exceeds 2 digits, discard the first digit and convert the remaining 2 digits to decimal.
The Checksum needs to be calculated in Hex first, then converted to decimal using the calculator provided above. Please pay special attention when calculating the checksum. I have included the checksum calculation in Hex and Decimal for each command. Here are some Samsung Hex to Decimal conversions that will work with the above documented method. Here are some links to our Support documentation regarding Serial connectivity Here is the spec from the Samsung manual In our example we will use a Samsung DM48E display. Now we complete the settings information for the display we wish to turn on / off. I believe the 3.5mm cable that comes with the TV is a NUL model cable intentionally, as it is used to daisy-chain multiple monitors together to utilize the MDC protocols. We first need to set up the RS232 configuration for the screen we wish to control, so go to the RS232 plugin and click Create New. You can test this with a continuity meter and male sure the tip goes to the tip and the ring goes to the ring. The manual for the QM series states that they Receive on the "Ring", so if the BrightSign player Transmits on the Ring, a straight through cable would be required. You need to be using a Straight through cable for Samsungs. BrightSign players receive Data on the tip. Hope this helps.By pulling the 3-wire TRS out like that, you are now connecting the tip of the cable to the ring of the player. The rest of the TV's in the house have Bright Sign players on them also running art all day, with more fun programming to make all that work. We ended up having an Alexa good-night command turn the TV's full off at the end of the day since the client has a jones about never having big black squares on his walls. So expect some jinky programming since the client will probably not want the TV to go off when you turn off a room since that kills the art mode. We're not using the Art Mode off command at all, just kicking it back to HDMI on both TV's. The other TV works as expected with On/Off etc. Why wouldn't Samsung just have two separate buttons? Whatever. That does emulate the remote where a short power press turns on art mode and a long press turns the TV fully off. That IR On command drives the TV straight to art mode, then we have to flip it to HDMI to watch TV. The one that won't turn back on we ended up sticking a blinker on it just for power on, an annoying fix but it is working. It's possibly a setting in the TV, but once Covid-19 struck I never went back to the house and had to depend on the other guys still going on site for info and setup. One of them will not turn on after being turned off via 232. Art Mode Off - \x08\x22\x0B\x0B\x0E\x00\xB2 Now that being said, the two TV's on site act differently.
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