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BLE NOTIFICATION EVENT limited to 20 bytes length

oga
Associate III

 

On a server device I'm updating a characteristic that is 32 bytes long and when receive the ACI_GATT_NOTIFICATION_VSEVT_CODE on client side I got only notified for 20 bytes.

I don't find any reference to a 20 bytes limit in read or notify command / messages but it looks I can't transmit more that 20 bytes in one time in one way or another

it's almost like a complement issue of this post : https://community.st.com/t5/stm32-mcus-wireless/read-characteristic-48-bytes-long-generate-3-read-permit-req/td-p/789019

I've try to change (enlarge or reduce) connection time min/max and scann window / period

Thank's to anyone that have any idea

 

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