I wanted to bump this threat because I saw anther blog post that had some RS232 codes for Samsung that look way different:
[Link: support.justaddpower.com]For example, Power On..
HEX: AA 11 FE 01 01 11
vs the one in the spreadsheet:
08 22 00 00 00 02 D4
Or do we need to convert the raw string to HEX?