BG77 DFOTA via COM: and need delta FW pkg

IoT Modules LPWA Module
1

Hello,

We plan to do BG77 FW upgrade by our FW via UART port.

  1. Need BG77 delta FW pkg for DFOTA via UART1 port.

The FW version now in module: BG77LAR02A04_01.005.01.005
TAhe target version to upgrade: BG77LAR02A04_01.201.01.201

  1. In BG77 DFOTA application note don’t have example, please advise the correct SOP.

  2. Please help to verify the below sequence is correct:

    a. AT+QFOTADL=“COM:”,xxx,yy (xxx bytes, time out yy secs)
    b. When CONNECT apprears, start to send delta pkg bin (xxx bytes)
    c. Until receive the below msg from UART:
    +QFOTADL: xxx,
    OK
    d. then?

  3. AT+QFOTADL=12 have different response in different FW ver for checking available flash capacity,
    a. BG77LAR02A04_01.005.01.005, returns +CME ERROR: 590
    b. BG77LAR02A04_01.201.01.201, returns +QFOTADL: 12,6946816

Thank you.