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ble pairing fail using secure connection | Cypress Semiconductor

ble pairing fail using secure connection

Summary: 1 Reply, Latest post by Madhu Sudhan on 21 Apr 2016 07:15 PM PDT
Verified Answers: 1
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samuel_chiu_1586636's picture
2 posts


My development tool can connect to CY5677 usb dongle, but it can't work correctly when I pressed "pair" button to enter pairing flow(LE Secure Connections and Justwork authentication).

At first, CY5677 would send pairing request, then I send "pairing response" and followed by "pairing confirm(slave)". But CY5677 seems not to receive "pairing response" because CY5677 don't send "pairing random" and CySmsart pop up "AUTH_ERROR_AUTHENTICATION_TIMEOUT" a few seconds later.

I found it strange that after we sent "pairing response", my ble sniffer showed "crc error packets" from CY5677 at the next connection event. 

However, I tried to set "SC bit(secure connection)" to 0 to request LE legacy pairing, it works fine! 

I don't know why happened with CY5677 and how to pair with LE Secure Connections properly.


mady's picture
Cypress Employee
955 posts


Please create a Tech Support case so that our engineers can look into this issue and review your firmware.


-Madhu Sudhan

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