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I succeeded in giving an AT command. My two BL MAC addresses are 21, 13, A03B and 21, 13, A3E2.

When I want to connect one to the other I use AT+BIND=21,13,A3E2. But then I see Error(7). If I use another BL address from the Internet, it works.

So, why won't my 2 HC05 bind?

1

The solution is

AT+BIND=0021,13,00A03B

NB: Here I just added 00 left side and right side digits

-1

I think that this is an error caused by a difference of firmware versions. Now BT is on version 3.0-20170601 and I think that this version does not accept these link or bind commands.

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