Can I read default chip with this module ?
Yes, it should be compatible. Be warned, this technology might get under your skin…
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I wish I had seen this post a few weeks ago. I literally went though the same experimentation process.
- This watch band gets recommended to me by Amazon
- I buy it thinking it might be a T5577 in disguise
- I find out it is not a T5577
- I install my own T5577 chip in the rubber housing
- I think “Hey I could 3D print this out of TPU”
Great minds think alike I guess 
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After about 4.5 months
I’m going to eat crow about that.
About a week ago I found the chip on the lounge room floor.
So it appears it is a genuine issue.
I still haven’t replaced it with a T5577, but I will start looking again for one that will fit and share here when I do.
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I actually swapped mine for a T5577 that I got on AliExpress:
$7.18 | ID 125KHz Micro size 10MM wriatable COB coil tag T5577 chip antenna RFID passive cards tags with EM4100 EM4305
https://a.aliexpress.com/_mrWiCaa
I determined that some googly eyes I had laying around have a very similar casing to the original chip. So I cut open a googly eye, removed the pupil, put in the chip and filled The cavity with super glue.
It was a slightly looser fit than the original and The backing was white instead of black.
So to solve that I wrapped it in electrical tape to prevent it from wiggling out and so it would match nicer
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Haha, I love it.
Thats a great mod
And I just happen to have some googly eyes (What self respecting man doesn’t???)
Thanks for providing links too.
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No problem! I made that one for a friend of mine so he can get into his apartment building with his Apple Watch. But I had a bunch of extra T5577 tags so I also made a couple more googly eye tags to test the 3D printed version that @StarGazer1258 made.
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Have you actually printed one? Did it work well? Would love to see it of if you make one. I never actually got to test the model, as I don’t have any TPU filament, nor a direct drive printer.
I haven’t printed it yet, but I think I am going to try to modify it to be able to accommodate this dual frequency coil combo:
https://www.aliexpress.us/item/3256804252007898.html
I’ll let you know when the chips I ordered get here 
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Nice. Have you thought about using liquid electrical tape to hild the coil in place? Also works great for water protection. Can be easily peeled out as well.
The gen2 tags i use are gen2 mifare magic
https://a.aliexpress.com/_EzGW7Ub
Although i rudimentary coat them in liquid tape and then hold them on the strap with hockey tape.
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I used PlastiDip for mine
Pretty much the same thing
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So I modified @StarGazer1258’s watch band model to fit these AliExpress dual frequency tags. When I say I “modified” it, all I did was scale it to 25.80mm across the x axis.
I printed it in TPU and it works wonderfully! I get reads super easy compared to my previous solution!
Here’s the modified file if anyone wants it:
Watchband_RFID_Tag_Holder_Long.3mf (676.2 KB)
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That looks awesome! I’m glad it worked out. If you want me to properly modify it for you, just tell me what needs done and I’ll get on it.
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Little update
My new watch 
Samsung Galaxy Watch Ultra has a slighty wider strap.(Peakform - Dark grey)
It looks to be 25mm
The Hornady Watch band fits snugly, and in my opinion, looks almost made for the strap.
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I was going to say “Welcome to the club” but then realized that your new watch uses a sliding type thing similar to the Apple Watch.
For those of you who don’t understand what I’m talking about, most watch bands are measured in millimeters and sizes are even numbers. So 16mm, 18mm, 20mm, 22mm, 24mm, etc… are standard sizes.
Still, my two favorite watches have 21mm lugs so finding straps is not as easy. And many G-Shocks, including mine, have 16mm lugs but are designed for wider straps. Thankfully, adapters are available if you don’t want to use G-Shock branded straps while having a watch that doesn’t look ridiculous.
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