Raspberry PI 3 contain internal bluetooth 4 and BLE:
Specifications
SoC: Broadcom BCM2837
CPU: 4× ARM Cortex-A53, 1.2GHz
GPU: Broadcom VideoCore IV
RAM: 1GB LPDDR2 (900 MHz)
Networking: 10/100 Ethernet, 2.4GHz 802.11n wireless
Bluetooth: Bluetooth 4.1 Classic, Bluetooth Low Energy
Storage: microSD
GPIO: 40-pin header, populated
Ports: HDMI, 3.5mm analogue audio-video jack, 4× USB 2.0, Ethernet, Camera
Serial Interface (CSI), Display Serial Interface (DSI)
Can we use this chip to transmit beacon signals like iBeacon or Eddystone?
I google it but I couldn't find any usefull tutorial. The result I find use bluetooth dongle for this purpose. Like this tutorial and this tutorial.