CC2541 disable RX feature

Jackie Chau

I'm using KeyFobDemo project and know how to disable advertising, but I would also like to disable BLE RX function in MCU active mode in order to save power, is there any method to do it?

Also in a clean KeyFobDemo project, I set "initial_advertising_enable=TRUE" & "gapRole_AdvertOffTime=1000" and use TI BLE device monitor & Android phone's apps to capture the found devices. Sometimes I discover that BLE can be found but sometimes it seems disappear (no data broadcast) within several seconds to 1 minutes, then recover to broadcast data, have you seen this issue?

over 9 years ago

0 JXS over 9 years ago

TI__Guru** 105180 points

Hi Jackie,

When you are not in a connection, the RX will not be active. Also, in between connection events, RX is not enabled. There is no user action required.

Do you have a sniffer trace of the reported "not found" behavior?

Best wishes

0 Jackie Chau over 9 years ago in reply to JXS

Intellectual 285 points

If BLE RX is not active, how can mobile phone initiate to make connection with TI BLE? Also, when connection is made, what should TI BLE do in order to enable RX to receive data?

0 Dhaval V over 9 years ago in reply to Jackie Chau

Genius 4470 points

Mobile phone initiate connection only after receiving advertisement packets from the peripheral device and during that time BLE RX remains active.

0 JXS over 9 years ago in reply to Jackie Chau

TI__Guru** 105180 points

Hi Jackie,

Since your question is more fundamental in nature, it would be best to take a look at some of the introductory BLE material on the BLE wiki: www.ti.com/ble-wiki.

Best wishes

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CC2541 disable RX feature