CYBT353027 eval board - SPP connection failure

[Arf]

I am trying to connect to a Microchip RN4677 module with BTC/SPP. The RN4677 works fine as I can establish SPP connection with all other devices I have ever tried, many different modules.

WhenI try connect with the 353027 (using ez-serial firmware), I always get this:

/btc,a=D88039F0D0FC,t=1
@R,000F,/BTC,0000,C=00
@E,0011,BTCF,C=00,R=0001
@E,0012,BTDIS,C=03,R=0000
@E,000E,ASC,S=01,R=03

Any advice? The RN4677 is in 'just works' pairing mode.

[Owen_Zhang123]

Could you check which version of the EZ-Serial are you using in the boot information?

[Arf]

Hi Owen,

It is 1.2.27.27.

Until I realised I needed to deassert the DTR pin in realterm to see incoming messages, I thought my eval board was dead and I reflashed the firmware image after downloading a ez-serial release, so it may be a different version to what the eval board came with.

[Owen_Zhang123 · Accepted solution]

I checked the latest ez-serial FW for CYBT-353027 is 1.2.29. Could you try it please?

https://www.infineon.com/cms/en/design-support/software/device-driver-libraries/airoc-wi-fi-bluetoot...

[Arf]

Working now, thank you!