For another example, I have a couple of these which are a bit bigger but have an ARM SoC and onboard Bluetooth (with antenna): https://www.digikey.com/en/produ

For another example, I have a couple of these which are a bit bigger but have an ARM SoC and onboard Bluetooth (with antenna): https://www.digikey.com/en/product-highlight/t/taiyo-yuden/eyshsnzwz-bluetooth-module https://www.digikey.com/en/product-highlight/t/taiyo-yuden/e...