CC2541 can't update S120 connection parameters

[bihu]

Hi Guys,

I'm doing a test between CC2541 and Nordic NRF51822. The CC2541 work as a peripheral role. NRF51822 as central role. But CC2541 can update another CC2541 that work as central role.

I didn't see any packet LL_CONNECTION_UPDATE_REQ on sinffer's capture message. Does this problem is a known problem? And any body have a solution?

Thanks!

[Hung Bui]

@bihu: Preferred connection parameter update should be set on the peripheral not on the central side.

We had the issue with CC2541 with older stack from TI before, that the TI chip doesn't accept connection parameter update with tx windows offset set to 0. In the newer TI stack it works though.

However, what you described it a little bit different where the S120 didn't sent LL_CONNECTION_UPDATE_REQ. Have you made sure the connection parameter update request is accepted by the S120 ?

Could you send me the sniffer trace that shows the issue ? Also please let me know your S120 version.