RN-42 Bluetooth Module - Parallax
Bluetooth module for the simpleRTK2B board - ArduSimple
HC-05 Bluetooth Module – Voltaat
Complete guide to bluetooth module : PCBA board integrating bluetooth function - IBE Electronics
BT850 Series Bluetooth Module
HC-02 6pin Bluetooth Module Compatible with HC-05 / HC- 06 - Robotools
BT800 Series Bluetooth Module
Bluetooth Module HC-05 (6pin + Button) – Free Electronics
XY-BT-Mini Bluetooth 5.0, DC 3.7-5V Audio module – Star International
DC 5V Bluetooth 4.0 Audio Module Bluetooth Receiver Universal Audio Bluetooth Module - Electronic Components Parts Shop Sri Lanka
HC-05 Bluetooth module not showing up for pairing - Sensors - Arduino Forum