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BlueNRG-M2 with bluenrg-2 ship: Modification of the ATT_MTU

Reda
Associate

Hello,

I am an engineering student currently working on optimizing the throughput of a firmware using BlueNRG-M2 with a Bluenrg-2 chip in Bluetooth 5.2 (https://www.st.com/en/wireless-connectivity/bluenrg-m2.html#st_description_sec-nav-tab).

My question is as follows:

Can we modify the value of ATT_MTU (Attribute Protocol Maximum Transmission Unit) for this chip? My previous chip was a Bluenrg-M0 in Bluetooth 4.2, and it couldn't have its ATT_MTU value set higher than 23, even though it was Bluetooth 4.2. It seems that some chips, like the MS series, couldn't change the ATT_MTU.

So, I decided to switch to Bluetooth 5.2 with the Bluenrg-M2 chip, which has Bluenrg-2, but I'm wondering if it's possible to increase the ATT_MTU value for this chip and, if so, by how much?

If it is possible, how can I do it once I receive the chip?

I don't find these information in the datasheet I am sorry :(.

NB: I saw that DLE is possible with this ship but i am not sure it is the same as modifying the ATT_MTU.

Best regards,

Reda Bellafqih

1 REPLY 1
IVent.1
Senior

Hallo, I'm struggling with the same problem, have you solved?thank you.