Can anyone help me How OTA Update and Data push into server will happens over a MQTT Protocol

[RJANA.3]

Controller : STM32H753

OTA Update and MQTT Communication between Sever and Controller

if possible can you please share related software flowgraph or Docs link with me

[Tesla DeLorean]

Use FTP or HTTP type protocols​

[RJANA.3]

Actually code is already there in project, They used MQTT As a communicaion protocol... But im new to IOT Kind of world

[RJANA.3]

But they havent shared any Documents except code, Even code is not tracable easily