Send large data (>20bytes) over BLE using Zephyr and NRF Connect SDK

[nik_mitros]

Hello everyone!

I want to develop and app the sends some sensors data over BLE.

I am trying the peripheral_uart sample of the NRF Connect SDK but it seems that I cant sent a packet larger than 20 bytes.

Specifically, I want to send an array of  uint32_t [32] or uint8_t [128] data, but when  I try to send data larger than 20 bytes the notification is enabled but no data are sent never to the NRF Connect phone app. Below is the code of the peripheral_uart sample i have modify and try

What configurations should I make to increase the MTU and send larger data?

I will appreciate your help.

[Kenneth]

I suggest to check out:
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/throughput/README.html

There are kconfig options in prj.conf you should set. Searching for the various kconfig options you find there should give some results here in devzone already.

Kenneth