Quote from cpuchess on May 18, 2021, 9:12 pm

I frequently have lights on the board come on during a game because a piece isn't recognized. I don't even have the chips covered with felt at the moment so the chip is physically touching the board. How could it not detect the piece?

Quote from Pietro on May 18, 2021, 9:25 pm

Hello again

It maybe possible that if you use quite heavily weighted pieces or with particular metal shape inside some pieces, the default chips 25mm maybe bit too marginal.

Which pieces you have mostly this problem with? What you can do is try is to add a bit of spacer between the actual base of the piece and the chip to increase the gap between the weight and chips this will normally drop disturbance very quickly.

To answer to you previous question the 1,4mm felt shall not affect at all it is very tiny distance i think as said maybe the chip is too close to the metal weight.

Let us know

Pietro

Quote from cpuchess on May 19, 2021, 11:59 am

Thanks for your reply Pietro. These are the pieces I am using

https://shop.worldchess.com/shop/official-world-chess-set

I didn't remove the felt that comes with the pieces, I simply applied the chips to the bottom so there is a felt barrier between the chip and the weight.

When I tried to cover the chip on one of my pieces with these self-adhesive felt pads, the board wouldn't recognize anything being on the board.

https://www.amazon.com/dp/B00SP5KL6A?psc=1&ref=ppx_yo2_dt_b_product_details

Thank you for your help..

Quote from Pietro on May 19, 2021, 7:13 pm

Hello

Nice set! And yes looks quite heavy else if sometime is not much the amount of metal but also how the weight is shaped.

Anyhow what I suggest is not remove the felt from piece but add another felt before the chip in order to lift a bit the piece from the board level and so the chip is bit farther from the actual base of the pieces.

Alternatively we should try with bigger 30mm chips on that specific set. Also can do a quick trial on PC to see if you see the same problem?

Pietro

Quote from julkal on May 22, 2021, 4:02 pm

Most likely, the shape of the metal causes the problem. I experimented for a really long time here because, I wanted to integrate the chip into my pieces and always had issues with some pieces. I also tried to place a heavy machine screw directly on the chip. Even with a screw that was much heavier than the weighted pieces, piece recognition worked without any problems. So it cannot be due to the weight alone.

To solve the problem, I then used a metal drill to drill a bit of metal out of the pieces (this of course changed the shape and the weight of the metal). This made it possible to glue the chip directly under the pieces (with perfect recognition) and with thin window leather instead of a felt it looks really good. My pieces have a total weight of 1500g.

One of the "highlights of the board is, that you can use pieces of your own taste, but in some cases you have to play a little bit to make everything working together......

Quote from cpuchess on May 23, 2021, 1:51 pm

Quote from Pietro on May 19, 2021, 7:13 pm

Hello

Nice set! And yes looks quite heavy else if sometime is not much the amount of metal but also how the weight is shaped.

Anyhow what I suggest is not remove the felt from piece but add another felt before the chip in order to lift a bit the piece from the board level and so the chip is bit farther from the actual base of the pieces.

Alternatively we should try with bigger 30mm chips on that specific set. Also can do a quick trial on PC to see if you see the same problem?

Pietro

Thanks Pietro. For some reason it works perfectly fine when connected to my PC but the piece doesn't register at all with the DaVinci module.

Quote from Pietro on May 24, 2021, 4:55 pm

Ok I think it's kind of limitation of power on the Pi.

Check if you are using  with original power plug or suitable 3.0A power bank in theory the usb power output from the port should be standard and shall work the same as on PC as the board is rated for that.

But we saw this once https://www.certabo.com/certabo-forum/topic/weighted-pieces-effecting-the-rfid-chips-2/ as the nominal power or actual voltage of PI is somehow dropping a bit also using the original power supply with some heavy pieces. I think the 30mm will solve as will work more efficiently with lower power we did solve with that for that case. Actually we made the 25 and 30 after that.

Which pieces are you experincing trouble with? We will send some 30mm tags for them.

All the best

Pietro

Quote from cpuchess on May 24, 2021, 9:34 pm

I have the board plugged into the 3.0A USB port (blue port).

I have only tried placing felt over the chip on the Queen.

 

Thanks for your help Pietro..