Bluetooth Pairing without password option

[Anantha Krishnan]

Hello,

I am using HC-05 Bluetooth module as a slave communicating with Android phone. The problem is that while connecting to HC-05 using mobile phone, each time the device pairing is required and it asks for the password. The user needs to key in the password. I am developing a system where many HC-05s will be communicating with the Android phone, but one at a time. It is practically impossible to enter the paring password each time it connects.

I am using MIT App Inventor 2 for the development on Android platform.

I am providing the address of HC-05 directly using "Call Bluetooth Client1.Connect address"

So my question is

1. Is it possible to send the pairing password as well through MIT App Inventor?

 if not, 

2. Can I pair HC-05 only by providing only the address?

3. Is there any way Android phone can save the pairing password for all the HC-05s and connect without asking for password each time. (One time saving of password is OK)

4. If the above is not possible, is it possible to disable the pairing password option?

Request MIT App Inventor Bluetooth experts to please reply immediately.

Thanks and regards

Ananth

[Taifun]

see the documentation http://ai2.appinventor.mit.edu/reference/components/connectivity.html#BluetoothClient

AddressesAndNames

The addresses and names of paired Bluetooth devices

answers to your questions

1) no

2) pairing must be done before using the app

3) this is not an App Inventor question, sorry, I don't know, probably you like to try another Android phone?

4) see 3.

Taifun

[Anantha Krishnan]

Thanks Taifun for your reply.

I found one option in bluetooth client to disable the password.

Uncheck the "Secure" option, so that it wont ask for the pairing password. This method is ok for an embedded device such as HC-05 where in it makes a one-to-one connection with the App. 

Regards

Ananth