Gina

BTW - the Win 7 laptop showed the com port fine from Device Manager and showed the correct chip so the Nano was connecting properly.

I'm clearly wasting my time...

Downloaded latest version of Arduino IDE - v1.8.5 and ran the install.sh script. Been re-arranging the directories and after much experimentation the sketch compiles. Still the same problem uploading though Previous version was 1.6.4.

Definitely the right board type "Arduino Nano w/ ATmega 328".

Looks like v1.0.5 on Linux. Think I try upgrading.

Yes, I know! I seem to be jinxed. Maybe it'll work another day! Blooming gremlins - I'm fed up with them!!

All three computers have been used to upload sketches to Arduinos, Nano, Mega and Uno. The Dell Satellite laptop running Linux Mint is what I use to update Marlin in my 3D printers. Moon dial clock Nano has been updated quite recently without any problem from my Linux Mint desktop. I usually know what I'm doing! OK I can go on making more prints but I would really like to check out the direction sensor chip for my wind vane.

Tried an Arduino Uno and still the same - and yes, I did change Board to UNO.

What! On all three computers??

And tried other sketches.

Well, I don't know... Had a mug of coffee and even been for a walk up the hill and back, tried 3 computers, three USB cables and two new Nano boards and whatever I do I get the same error. Maybe I should take up knitting again!!!!!!

Nothing connected to any of the pins yet - brand new board.

Yes, yes and have done - thanks for the suggestions

Not working on that either Going to get coffee!!! One other thing I can try and thats another laptop with Linux Mint.

Tried uploading to a new Nano board but I seem to have a computer problem :- Tried other Nanos and other sketches - all the same. Maybe I'll try my Asus laptop with Win 7.

Sorted out the directory structure for the MLX90316 test sketch and it compiles

Finally sorted out the wind vane axle, spacers, aluminium disc and magnets Still have the direction sensor to sort out. Then there's the anemometer to attach and the wiring to the Arduino Nano. Everything seems to take much longer than expected!

Those 4 legs are remarkably strong without fillet

Yes, I usually do this wherever there is a possibility of breakage.

New top bearing holder. This also holds the anemometer pedestal.

I don't have mains gas or water A nice little digital oscilloscope kit arrived today

Designed and printed the bottom bearing support "spider" and been checking things. I've found out why I was having so much trouble with the spacers - the part that holds the top bearing was off centre and causing the disc to tilt so that it was catching on the magnets. I have now removed the top bearing holder and will print a new one.

Print is perfect It stays in place without anything holding it due to the ridges produced by the large nozzle size. It sits about 1.5mm inside the outer casing so rain will drip off nicely without running along the bottom plate. I'm now fiddling with the spacers to make up the correct distance from top bearing to disc and from disc to bottom bearing. The spacer from bottom bearing to wind vane is easy because it's in full view. I think I'll print a three legged support for the bottom bearing to hold it in place but let me see how the spacers are working.

Redesigned the bottom plate as it was a bit small plus I shall have it the other way up with "legs" to space it in the outer casing.

Yes the prints are very strong Probably over engineered but we get some very strong winds here at times and this is going to be nearly 7m above ground level on the side of a hill facing roughly SE.