DFU using the zip vs DFU using hex ?

[ToTo]

Can you tell me waht's the difference from using DFU by "hex" and "zip" ?

Which is recommended ?

[bjorn-spockeli]

Hi Toto,

Performing a Device Firmware update(DFU) with a hex is the legacy way of updating firmware, applicable for SDK v6.x and older.

You have to create a distribution zip containing the firmware image in order to perform a DFU if you're using SDK v7.x and upwards.

-Bjørn

[ToTo]

So i have to know how to do it with the zip way as in this link when i use recent SDK ?
Can you please tell me how can i know a way to know the SDK im using in my app ?

Is there any SDK recommanded for SD130 ? It's a little bit confusing for me, how to choose the SDK and even the Softdevice versions