| Bluetooth HC-05: Error 507 “Unable to connect” on Android 12+ |           | 13 | 483 | September 12, 2025 | 
        
          | Project problem: Tilt detector using Arduino UNO, Tilt switch, HC-05, and App Inventor |       | 6 | 505 | January 7, 2025 | 
        
          | Heart rates with arduino |     | 1 | 448 | November 14, 2024 | 
        
          | Bluetooth: App not receiving data from Arduino HC-05 |           | 15 | 5368 | September 10, 2024 | 
        
          | Reading values incoming from HC-05 |     | 2 | 541 | May 4, 2024 | 
        
          | Fire_Alarm_System using HC-05 and arduino |     | 4 | 887 | April 25, 2024 | 
        
          | Who can solve this error 503 in the App; mac adress not valid HC-05 Module |           | 13 | 2548 | February 27, 2024 | 
        
          | HC-05 arduino can't read serial monitor with MIT App Inventor |       | 5 | 3283 | October 10, 2023 | 
        
          | Hc05 bluetooth with water level sensor |     | 2 | 1107 | September 24, 2023 | 
        
          | Faulty Bluetooth data hc-05,Nano |         | 14 | 2670 | March 27, 2023 | 
        
          | Bluetooth cannot send characters |           | 23 | 2026 | March 29, 2023 | 
        
          | BT app text sending is unreliable to HC-06 connected to a Arduino |       | 8 | 891 | December 22, 2022 | 
        
          | HC-05 Bluetooth. Arduino. Change baud rate 38400. Send random to app |   | 5 | 16397 | October 18, 2022 | 
        
          | Anyone who know how to use hc-05 multiple other screen  ? |     | 1 | 779 | August 13, 2022 |