https://www.silabs.com/wireless/bluetooth/efr32bg1-series-1-socs/device.efr32bg1b232f256im32?tab=softwareandtools
EFR32BG1B232F256IM32 Bluetooth Wireless Chip - Silicon Labs - Silicon Labs
EFR32BG1B232F256IM32 (EFR32BG1 Series 1) Bluetooth Wireless Chips include support for Bluetooth Low Energy (LE), Bluetooth 5 and Bluetooth mesh networking.
bluetooth wirelesschipsiliconlabs