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pathetic piss kitten @kitten@elizabeth.cat
9mo
kitten playing with trackers okay, so, my tinkering with Bluetooth beacons/trackers begins

I bought a bunch to be able to play around and see which one its holder likes the most
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pathetic piss kitten @kitten@elizabeth.cat
9mo
kitten playing with trackers first contender: nrf51822 (like almost all the boards), with an incorporated SHT30 temperature and humidity sensor, using a CR2032 battery

this one is my favorite for the moment, both because of the neat small form factor, and because the seller provides the pinout for the board... except mine doesn't match any of the ones they provide..but I asked them, see if they can provide it.

a.aliexpress.com/_EJjjOxI
small black PCB with a nrf51822 microcontroller in it and a small button in the center
the board inside its white plastic case, with a blue plastic button, in my hand
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pathetic piss kitten @kitten@elizabeth.cat
9mo
kitten playing with trackers the second, another nrf51822, this time by itself, and this time using a CR2477 battery

this one... is not looking good. it's just too big, and that's with half the PCB empty. besides, the case has no way of attaching it to anything

it does have an upside though: I found the datasheet in the internet, with the pinout. not only that, it has 4 available digital I/O pins, which means: potential

a.aliexpress.com/_EHqjtVA

www.holyiot.com/tp/2019042814310092401.pdf
big black PCB with a chip in the middle, marking "N51822" barely visible
the chip in a big bulky black round case, in my hand
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pathetic piss kitten @kitten@elizabeth.cat
9mo
kitten playing with trackers and the last one! this one I bought to see if anything could be done with it, but it's not an nrf51822, so I don't know if I will be able to flash it. it has a st17h65b chip

I bought it for two reasons: it's factory compatible with both Apple's FindMy network and Google's Find Hub, and it has an integrated speaker that can beep! the form factor is also very nice

a.aliexpress.com/_EJau7Zq
larger black PCB with a lot more components in it
larger but flatter case with a button and some leds
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User avatar
Maaike 🔜 eth0 @ayke@blahaj.social
9mo
kitten playing with trackers @kitten haven't heard about that chip before! It's not on Mouser or Digi-Key so must be kinda rare. Perhaps only meant for the Chinese market?
Looking at the datasheet it looks quite capable, it has a Cortex-M0 and plenty of flash/RAM.
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pathetic piss kitten @kitten@elizabeth.cat
9mo
kitten playing with trackers @ayke it seems very associated to these tracking devices, yes
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