# HC-05 Bluetooth module not showing up for pairing

**URL:** <https://forum.arduino.cc/t/hc-05-bluetooth-module-not-showing-up-for-pairing/1148185>\
**Category:** Sensors\
**Created:** [July 14, 2023, 9:02pm UTC](https://forum.arduino.cc/t/hc-05-bluetooth-module-not-showing-up-for-pairing/1148185 "2023-07-14T21:02:00Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![groundFungus](https://avatars.discourse-cdn.com/v4/letter/g/73ab20/32.png) [@groundFungus](https://forum.arduino.cc/u/groundFungus)\
**Post date:** [July 14, 2023, 11:25pm UTC](https://forum.arduino.cc/t/hc-05-bluetooth-module-not-showing-up-for-pairing/1148185/2 "2023-07-14T23:25:30Z")

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I have seen that the HC05 will not pair with another device if it is in master mode.

I wrote a tutorial for putting the HC05 into AT mode. \>\> [Setting HC05 (ZS-040) to AT mode](https://forum.arduino.cc/t/setting-hc05-zs-040-to-at-mode/1059616)  
With help of Martyn Currie' pages. \>\> [Arduino with HC-05 (ZS-040) Bluetooth module – AT MODE | Martyn Currey](https://www.martyncurrey.com/arduino-with-hc-05-bluetooth-module-at-mode/)

Change to slave mode with AT+ROLE=0

Lots of info about the HC05 from Martyn Currie. \>\> [HC-05 | Martyn Currey](https://www.martyncurrey.com/tag/hc-05/)

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