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I'll have to talk with our SW engineer about #2... but normally computers aren’t happy begin reprogrammed while they’re also working… if the OE ECU is powered up, it’s talking to the Flux2 which is talking to the Unichip.
Everything should be fine if you unplug the PnP's Unichip 24-pin connector when you want to program it.
As for the working in Hyperterminal, it’s a pretty low level communication and doesn’t have many functions like “help.” There are some basic capabilities, but if you do anything else, you get “Unrecognized Command.” You can find lots of stuff on line about using Hyperterminal if you’re not familiar with it.
A handy tip if you don’t use Hyperterminal that will make reading text easier… in the Properties tab during set up, select ASCII Set Up and check the box next to Append line feeds to incoming line ends.” If you don’t, you’re always typing on the first line and new text appears on top of old text which gets funky.
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