When you say “this is explicitly for iot manufacturers…” are you referring to secure boot? That’s what I was referring to. I’ve done embedded development for about a decade, 6 at an IOT company, and our main motivation for using secure boot was to keep our firmware secure. The last thing we want is someone writing an article on the internet about how with this one easy trick you can break the security of the device and do whatever you want ( the devices are related to access control). If the company went out of business we’d have the option of publishing the signing key but it’d render all the devices vulnerable to malicious OTAs. Point is we’re not trying to lock folks out of tinkering, we’re trying to keep the devices secure. I understand as a side effect it means you can’t flash the device to whatever you want.
Also for what it’s worth these ESP chips are unbelievably cheap when bought at scale. The box the product comes in is probably more expensive
If the developers really wanted to you have the key, they could just write the per device unique key in the box or on the pcb. What you’re suggesting is more or less possible, the problem is you represent a very niche case. 99.9% of consumers don’t want to reprogram a chip already soldered to a board and it’s not worth the time catering to them. Also some IOT devices are left in physically insecure places like on the exterior of the home, you’d never want some to be able to extract the firmware key or re-flash those devices.
One compound is terpinen-4-ol which is a primary constituent of tea tree oil. Several products containing terpinen-4-ol exist to treat rosacea and ocular rosacea such as Cliradex and Oust Demodex.
Study of commercial terpinen-4-ol products against mites:
Before the flood I wonder what life was like in the basin? In particular steeper areas of the outer edges must have been fascinating. During the summer the warm but relatively cool air at sea level I assume could sink down into the basin. With the basin a mile or so deeper the temperature of the sinking air would have increased drastically as the pressure increased. I’ve not done the calculations but my intuition is the temperature would make hot days in Death Valley look cool.
I wonder if it could be used in submarines?