Cytron Technical Forum

Hi there. I'm encountered some problem regarding the KC21 Bluetooth module. I followed the instruction base the project PR6A and constructed it. But then, it's seems like can't be pair or connect with my computer. Once i click pairing with KC21 Bluetooth module using BlueSoleil , it just show :" Operation is not successful.Please try it again ".I tried to connect it using my mobile phone by using some Terminal software, it work fine. And whenever i changed the Security to enable, it doesn't require any passkey to connect it from my phone nor computer, odd.

You can try double click on the KC21 on Bluesoleil, it should be able to connect and search for available service. If it ask to for key, then only enter "1234".

Besides that, how could we update the firmware of this module? I had tried the guide provide by KC wirefree to update it but fail.

Are you using SKKCA-21? Or you are using the module? As far as I know, I never update the firmware. I did use it sometime ago, but now I keep it for my kid to play in future. Where is the document to update firmware?

@robosang
Ya, i'm using SKKCA-21. Try visit their website, google search for KC wirefree to get the result...
Too bad, SKKCA-21 can't be update.

Can you show us the document you refer and the software use to update firmware? Maybe I can try it out, no promise as SKKCA-21 is not designed for that purpose