I have here a sky view data logger!

for the wm918, wmr918, ultimeter
i am going to get WD to extract the logged data
i have made some progress (i can get the status report)
but am stuck on the CRC part
anyone out there real good with bitwise manipulation who can help?

I cant claim to be proficient in this stuff any more, but I did do some of that sort of thing back in the 80s. A quick check of the books here gives me a couple of C listings for CRC-16. I have listings for bit-wise, byte-wise, and table driven. Looks to me like the bitwise is the best fit for Delphi. Would you like me to email you the listing. Its only about a dozen lines plus comments.