https://www.silabs.com/wireless/bluetooth/efr32bg29-series-2-socs?sl-l2attributefilterkey=sl:digiopins&sl-l2attributefiltervalue=25&sl-l2columnname=GPIO
EFR32BG29 Series 2 Bluetooth LE SoC - Silicon Labs
The EFR32BG29 Bluetooth LE SoC is tiny, highly efficient, and low-power, with large memory ideal for secure battery-powered IoT devices like medical devices.
bluetooth leseriessocsiliconlabs