Cysmart refuses to OTA on some phones

[Panometric]

We have many devices deployed with CYBLE-012011-00, using a fixed stack BLE component V3.30.After having build new applications  for them, some phones cannot perform an upgrade. For example: A Pixel4a seems fine, A Pixel1XL fails.

When starting the upgrade, it pauses for some time, but never advances the % done. Then several popups come up very fast, but only the last is visible. : CYRET_ERR_CMD. I think I have seen something about a checksum failure, but it's so fast I can't be sure. Considering that some phones work I can only conclude the files are OK and that this is a CYSmart issue, but it could also be the device bootloader I suppose.

Cysmart log on phone that fails is attached, but I don't see an errors in it. The Cysmart version is current from the Playstore.

This is holding up release of application code because we are unsure if this is a more widespread issue that needs correcting.

Are there know issues that could cause this?

Are there known workarounds?

What would you advise?

[VenkataD_41]

Hi,

There can be many causes for this issue.

1. Keep the BLE interrupt at highest priority. Please ensure that CyBLE_ProcessEvents() API is called once in connection interval.

2. If it is possible for you to access the Bootloader project, please update the components to the latest BLE component i.e. BLE v 3.66, latest boot component i.e. Cy_boot5.90 and Bootloader component 1.60. Let us know the results.

3. Please go through the following KBA and implement the same:

    ECO Capacitance Trim Values for EZ-BLE™ Modules - KBA218990

4. Keep the BLE device very close to the mobile.

Thanks

Ganesh

[VenkataD_41]

Hi,

5. If possible, please also attach the BLE Sniffer logs while the OTA communication is happening .

Thanks

Ganesh

[Panometric · Accepted solution]

We found the capacitive trim was not done correctly in the fixed bootloader. Since running the bootloader resets it, it will only show up when doing OTA.