Size of data bytes

[lm]

Hello,

i'm programing a nrf52832 and a nrf52805 and I'm using the peripheral uart example, I would like to change the size of the bytes of my rx and tx that I can send (150 or less) because for now this is 20 characters maximum.

I already tried to change the size of NRF_SDH_BLE_GATT_MAX_MTU_SIZE. He has a valor of 247 but my program is not working after that.

Thank you so much for your help. 

[lm]

https://devzone.nordicsemi.com/f/nordic-q-a/28388/android-sending-data-20-bytes-by-ble i saw this post about the augmentation of size of bytes but i would like to apply this method to RX AND TX peripheral_uart example. My goal is to send notifcations by packet of 20 bytes to permit to send a lot of info. Do you have a solution? thank you in advance

[ovrebekk]

Hi 

The thread you refer to is very old, there should no longer be any limitation in Android when sending longer packets. 

Can you let me know which SDK version you are using and which phone you are testing on?

I just did some testing with the ble_app_uart example in nRF5 SDK v17.1.0, and my Huawei P20 Phone, and I have no problems sending packets > 20 bytes using the standard example out of the box. 

For testing on the Android side I used the nRF Toolbox app. 

Best regards
Torbjørn

[lm]

Okay i'm going to give you the infos but for you this is possible to send more than 20 bytes?? because when I see my app my packet are 20 and if I write more than 20 bytes it disappear... i cant see the rest