![HC-05 Bluetooth AT Mode can change NAME but not PIN. - Networking, Protocols, and Devices - Arduino Forum HC-05 Bluetooth AT Mode can change NAME but not PIN. - Networking, Protocols, and Devices - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/1/6/c/16cfb8bfb028d1512efbdd1eee797df557e211a9.png)
HC-05 Bluetooth AT Mode can change NAME but not PIN. - Networking, Protocols, and Devices - Arduino Forum
![HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/612CH8mJu-L.jpg)
HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino
![arduino uno - Why can't my bluetooth receive serial data from my android phone, but can send serial data from my bluetooth to my android phone? - Arduino Stack Exchange arduino uno - Why can't my bluetooth receive serial data from my android phone, but can send serial data from my bluetooth to my android phone? - Arduino Stack Exchange](https://i.stack.imgur.com/mwQEs.jpg)