April 2023

Just got myself a Flipper Zero because #whynot.

However, the updating process from 0.6x.y to 0.82.3 was not very smooth sailing:

• First it was stuck in synchronising on the iOS app refusing to initiate the update (had to force quit + reboot Flipper Zero to get it to continue)
• After that, once I managed to upload the new firmware, it was stuck on Waiting for SD card after the Flipper rebooted.

The SD card I tried was an old 2Gb Samsung SD I had lying around (have 3-4 of these).

Normally, when foreign particles are introduced into the body, the immune system responds to destroy them. In the case of tattoos, though, the story is more interesting. As it turns out, our immune system does respond immediately when a tattoo is first inked. Cells swarm the damaged area of epidermis and dermis to try and deal with the invader. However, when these cells, called macrophages, interact with tattoo pigments, there’s a problem. The pigment particles cannot readily be broken down by the enzymes carried by the macrophage. Instead, the pigments remain stuck inside the macrophage until it eventually dies off and falls apart after a few days or weeks. Then, the pigment particle is ingested by another macrophage and the process begins again. Conveniently, just like skin, macrophages aren’t very opaque. This means we can still see the tattoo pigments even as they’re being swallowed and released over and over again.

Because I keep forgetting and it takes me far too much time to go through one of my million sites where I set this up and find the right config...

To allow a USG (Unifi Security Gateway) to reply to external (WAN) ping requests, do the following:

• Head to the Unifi dashboard -> Settings -> Firewall & Security
• Create a new rule
• Type: Internet Local
• Description: Allow Ping (Echo Request)
• Rule Applied: Before Predefined Rules
• Action: Accept
• IPv4 Protocol: ICMP
• IPv4 IMP Type Name: Echo Request
• Apply Changes -> wait ~2 minutes

That's it...