Single coin cell powered lorawan keychain for asset tracking (keys, goods...). Uses TTN network as backbone
BOM: Direct link - https://octopart.com/bom-tool/7kjUDu4h
MCU - https://www.mouser.es/ProductDetail/STMicroelectronics/STM32L010K8T6?qs=sGAEpiMZZMuoKKEcg8mMKJ29ob8kKavQa1RJXtJaF2EQrlsny%252B%252BOAQ%3D%3D
Accelerometer - https://www.mouser.es/ProductDetail/STMicroelectronics/LIS2DWTR?qs=sGAEpiMZZMvwE4h8i4g3ciyD89pKII0LOuU5I4U7wTA499uhDLrlBw%3D%3D
Piezo Driver - https://www.mouser.es/ProductDetail/Diodes-Incorporated/PAM8904EJPR?qs=sGAEpiMZZMuyaNrx2BHM4u3bWRUoci4tog8p9j%252Bt6Z6vibT80P8XDQ%3D%3D
Boost - https://www.torexsemi.com/file/xc9141/XC9141-XC9142.pdf
Piezo Sounder - https://www.mouser.es/datasheet/2/670/cpt-9019s-smt-1310960.pdf
Bought in Digikey as there were a shortage of piezo in Mouser
New Piezo - https://www.digikey.es/product-detail/es/murata-electronics/PKMCS0909E4000-R1/490-9647-1-ND/4878401