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Trunk's Technical Blog

Unbiased DJI Osmo Action Review for Skydiving

Posted by Mark Kirschenbaum on

The DJI Osmo Action is taunted as the GoPro HERO7 Black killer so I had to purchase one and see how it compares. I am not sponsored by GoPro or DJI and have no skin in the game, so this is an unbiased review versus most of what you read on the internet. On it's release, I had only a few hours before a trip to put it through the ringer. At the consent of iFly Phx, I was able...

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Anti Cloning Technology on the GoPro HEROBus™ 2.0

Posted by Mark Kirschenbaum on

FOR SECURITY RESEARCH / Interoperability with our products.   Starting with the GoPro HERO5, the USB-C interface supports accessories such as a quick charger, a Mic adapter, and the Karma Drone/Grip. Briefly GoPro Inc. provided a developer program for access to this interface, but they soon dissolved that division as the company went south.  After some, (a lot), of research, we've found the developer program only allowed access to a subset of the Herobus™ 2.0 (HB) functionality. Although I haven't bought a third party...

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GoPro HERO7 Silver & GoPro HERO7 White Research

Posted by Mark Kirschenbaum on

The GoPro HERO7 White & Silver are completely different beasts from previous GoPro cameras. Based upon yet another image processor, Qualcomm Snapdragon 624, the architecture is a Qualcomm Snapdragon reference design with the GoPro application layer. Here is a quick psuedo-teardown of the GoPro HERO7 White & Silver.  Hardware Name Tasmania perhaps originally named Popoyo  Product name Code Name Cam ID GoPro HERO7 White Boomer H18.02 GoPro HERO7 Silver Badger H18.03 Design Wins Processor Qualcomm APQ8053 Snapdragon 624: Octa-Core, 8x ARM Cortex A53 Up To 1.80 GHz.  APQ8053-Lite GoPro HERO7 White...

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GoPro HERO7 Black Teardown

Posted by Mark Kirschenbaum on

The GoPro HERO7 is an update HERO6 with 2GB vs. 1GB of ram, a new USB interface chip, and an MFI chip to associate better with iPhones. Trunk touches quickly on various security vulnerabilities with these kind of IOT devices and how to remediate them for those needing OPSEC.

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The Etiquette of Sharing Skydiving Photos

Posted by Mark Kirschenbaum on

Let me start with saying I love when people share my photos. I get gratification out of seeing my work as your profile picture, featured on your Instagram account, or even passed around Chive. I shoot because I enjoy capturing people's pure smiles in freefall. Regrettably, the truth is, most Skydiving Photographers make little to no money off of event photography. Personally, I spend 5-8 hours ingesting, editing, watermarking, and posting a weekend's worth of photos. At the bigger events, we get reimbursed for...

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