Again, this is my first DJI product. As far as I knew this is the first and only hub they've ever made and if there have been hubs for other products, they've had 40 firmware updates.
Step one on page 8 of the linked hub manual states: "Download the latest firmware update program from the official DJI website.
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Mavic – Specs, FAQ, Tutorials and Downloads"
As far as I can tell their firmware update program is the DJI Assistant 2 software available from that url. At least, that was the only way I was able to update the firmware on the controller, drone and hopefully, all 3 of my batteries.
Step 2 says to turn on the hub before connecting it to a computer but there is no instruction about how to turn it on. If they meant I should plug it into the wall or connwct a battery, perhaps they could use the correct words. I tried the German and French instructions and they are equally cryptic.
In any event, the Assistant 2 software didn't detect the hub so was unable to establish a firmware version.
I made a guess that DJI used a separate software program to update hub firmware and since none was listed, perhaps none existed. It's equally possible that any hub update would be distributed as an update to the Assistant 2 program and, as that failed to detect the hub, no update was yet available. Or it could mean the hub has a defect.
In the mean time, there is nothing but internet rumor substantiating a guess as there is nothing from DJI that addresses the question.
If the hub has firmware, what is the current version and how do I query the hardware for the installed version.
I don't understand why people are getting uppity about a newbie asking some simple straight forward questions about some equipment I spent $1,750 Cdn on. Why doesn't DJI just explain rather than leave it to internet conjecture?