RS-232 yup, but I will be honest, we still use it in GPS hardware I work on, Serial with Baud Rates from 1hz to 20hz 19,200 to 115,400 its simple and it works!
I am with you on the JD I refuse to own JD powered products, had JD techs tell me they don't like my stuff in there customers machines, it seems when some people get a job for a large manufacturer like that they loose all ability to think. This is why I will advocate for any company, but there service has to be good. more companies and brands in a market, the more diluted the presence of any one in particular.
People like a sense of belonging and the marketing departments capitalise on this, some will never buy another brand in fear of being judged by others, some ford owners will never buy chevy etc, so what happens then is if the service is bad there is still a high probability they will buy another from the same brand, we farm with 4 brands of tractors, I have had many different brand cars, I like variety and buy on function.
the service has been bad on this Hisun, it stopped the end of January, dad is 4 hours from the dealer, he was going to come look, now complains it's too far, but he was happy to deliver it to us for free (we will pay for his travel, but he says yeah I will be there and never turns up lol), he has promised and never delivered, its done 200 hours in 7 months, it sits dead in the shed, so my father is using his other bike, if the dealer showed a interest in it earlier I would not be so upset. As from now I cannot recommend a Hisun Vector 750 to anyone unless the dealer is local, and he has a will to keep business, and gives a damn about you. I admit there has been a lock down with the Virus, but Couriers run every day, and diagnostic computers can be couriered, so can sensors. but we have had nothing. If i ever get to look at it myself, i am guessing its either a sensor, or valve clearance or something.....till then its dead in the shed and everyone in the neighbourhood has seen it there lol.......building a brand is a team effort huh!.....next one we buy will be a kubota or yamaha or something, no worry.