The data sent using sd_ble_gatts_hvx() is appended with "00" for the MTU size.

[AOI]

I am using nRF5 SDK (17.1.0).

The MTU size is set to 53.
I am using sd_ble_gatts_hvx() to send 16 bytes of data via Notification.

When I check the received data with the nRF Connect app (Android),
it is received with 34 bytes of "00" added after the 16 bytes of data.

What I actually want to implement is to send only 16 bytes of data.
How can I send it without adding "00"?

[AOI]

I was able to send variable length data by setting is_var_len to true (1).