@startuml

Title FreeRTOS Cellular Library interaction with com interface

participant Application
participant "FreeRTOS Cellular Library"
participant cellular_comm_interface
participant cellular_modem

note over Application : Application needs cellular connecitvity.\nCellular_Init() is called to open FreeRTOS \nCellular Library. Communication interface\n, pCommInterface, is provided by\napplication to "FreeRTOS Cellular Library".

Application -> "FreeRTOS Cellular Library" : Cellular_Init( pCommInterface )

activate Application

"FreeRTOS Cellular Library" ->cellular_comm_interface : pCommInterface->Open( receiveCallback )

cellular_comm_interface->cellular_modem : Register receive callback\nOpen and setup communication device driver\nPower on and enable device

cellular_comm_interface-->"FreeRTOS Cellular Library":

"FreeRTOS Cellular Library"-->Application:

deactivate Application

note over Application : "FreeRTOS Cellular Library" APIs ready.\nApplication get network time with\nCellular_GetNetworkTime() function

Application -> "FreeRTOS Cellular Library" : Cellular_GetNetworkTime()

activate Application

"FreeRTOS Cellular Library"->cellular_comm_interface : pCommInterface->Send()

cellular_comm_interface->cellular_modem : AT+CCLK?

cellular_modem->cellular_comm_interface : +CCLK: "20/06/09,12:06:33+32"

cellular_comm_interface->cellular_comm_interface : Store `+CCLK: "20/06/09,12:06:33+32"` in buffer

cellular_comm_interface->"FreeRTOS Cellular Library" : receiveCallback

"FreeRTOS Cellular Library"->cellular_comm_interface : pCommInterface->recv()

cellular_comm_interface-->"FreeRTOS Cellular Library" : Return data in buffer

cellular_modem->cellular_comm_interface : OK

cellular_comm_interface->cellular_comm_interface : Store `OK` in buffer

cellular_comm_interface->"FreeRTOS Cellular Library" : receiveCallback

cellular_comm_interface-->"FreeRTOS Cellular Library" : Return data in buffer

"FreeRTOS Cellular Library"->Application : Return network time

deactivate Application

note over Application : Applicaton no longer need cellular\nconnectivity. Cellular_Cleanup() is \ncalled to close FreeRTOS Cellular Library.

Application -> "FreeRTOS Cellular Library" : Cellular_Cleanup()

activate Application

"FreeRTOS Cellular Library"->cellular_comm_interface : pCommInterface->Close()

cellular_comm_interface->cellular_modem : Power off device\nClose communication device driver\n

cellular_comm_interface-->"FreeRTOS Cellular Library":

"FreeRTOS Cellular Library"-->Application:

deactivate Application

@enduml