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I have an Arduino Mega 2560 and a BLE Shield v 2.1 from RedBearLab. When I try to connect it through Bluetooth from my laptop to 'BLE Shield', it says 'Connected!'. When I try from a Windows phone, it also says 'Connected'.

But when I try to connect from an Android device, it gives me an error: 'pairing rejected by BLE shield' or 'couldn't pair with BLE Shield because of an incorrect PIN or passkey'.

What seems to be the problem?

dda
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asked Feb 26, 2017 at 14:20

1 Answer 1

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I would guess that the problem is an incorrect PIN or passkey.

I've read from manuals for some gadgets that some devices/phones automatically try the PIN 0000 and some don't. I have never seen my Windows phone ask for a PIN when the device hasn't got one set, so I'm guessing that Windows automatically tries 0000 and Android doesn't. Is there a setting on Android that will let you enter the pin (which is probably 0000) ?

answered Feb 27, 2017 at 8:12
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    Also, sometimes the pin is 1234 on default and can be changed through AT commands Commented Mar 29, 2017 at 20:35

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