Studio Bluetooth Forum Discussions

[KeTa_1341526]

Hello,

In the following Community, it is described in MTU Size of PSoC BLE version.

Re: How to change MTU size for EZ-Serial BLE​

Similarly, what is the MTU Size allowed by the EZ-Serial Firmware of the CYW2070 x-based Module (CYBT-343026)?

Best regards,

Takahashi

[Owen_Zhang123]

The maximum MTU size for the CYW2070x-based module is 512 bytes.

[KeTa_1341526]

Thank you for your response.

As a confirmation, I think the UART receive buffer is 128 bytes.

Please tell me about the case where MTU size of 128Byte (MTU Size is 131byte = Header: 3byte + Data: 128Byte) or more is requested by Central.

In this case, does the BT Stack start Notify transmission when the specified MTU size of data is sent from the Host MCU?

Best regards,

Takahashi

[Owen_Zhang123 · Accepted solution]

Are you using the EZ-Serial FW?

If yes, please refer to the following user guide in chapter 7.2.8.4: EZ-Serial WICED Firmware Platform User Guide for CYW2070x-based Modules (cypress.com)