Bluetooth Pairing Issue with HC-05 & ELM327

Projects Networking, Protocols, and Devices
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Hello,

I'm experiencing a problem when pairing the HC-05 with the ELM327 Bluetooth module. I've connected the HC-05 in AT mode using 3V, and I'm sending the following commands for pairing:

  • AT+RESET
  • AT+ORGL (Set to original)
  • AT+ROLE=1 (Set to Master)
  • AT+CMODE=0 (Set connect to a specific address)
  • AT+BIND=1234,56,789c72
  • AT+INIT (Need to connect)
  • AT+PAIR=1234,56,789c72,20 (,20 means a 20-second timeout)
  • AT+LINK=1234,56,789c72

I’m not receiving any response to the last three commands, and the connection isn’t being established.

Has anyone encountered a similar issue or have any suggestions on what might be causing this problem? Could it be related to the pairing commands, wiring, or something else?

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TERAS
TERAS959×363 9.16 KB

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