This module allows you to connect a serial UART device (RX, TX) at TTL Level (3-3.3V) to a Bluetooth radio.

     The header on this module is designed to connect with other TagSense products, such as the Nano-UHF reader or Micro-1356 reader module, for example.

The Pin-out is: RX-TX-GND-Vcc

      The Bluetooth module uses classic Bluetooth protocol (v2.1) and supports the Bluetooth serial data profile.