Judging from the build.sh, it looks like this is just using unmodified upstream u-boot and tools from the rockchip-linux repository, so "from scratch" is really just analyzing the DTB to see what drivers need to be loaded?

The https://github.com/logicog/RTLPlayground alternative firmware for RTL8372/RTL8373 based 2.5GBit Switches does fit into 512KiB, including web management interface.

Cost breakdown:

- 400 EUR 2.4kWh 48V battery

- 320 EUR 4x 360W solar panels

- 200 EUR 800W microinverter

- ~200 EUR for helping hands when getting the panels onto the flat roof

- 160 EUR flat roof mounting equipment

- 153 EUR solar cable, connectors and crimping tool

- 115 EUR MPPT charge controller and cables

- 95 EUR electrics (e.g. fuses, dc/dc converter for OpenDTU)

- 50 EUR other assorted costs

So about 1693 EUR in total.

Total yield after 1.3 years: 1715 kWh (including power fed back into the grid)

Of that, discharged from battery: 488 kWh (battery already paid back ~146 EUR)

At the current energy costs, 1715 kWh would be ~514 EUR imported from grid

If the underlying virus is the same, what is different between the vaccines? How it presents shouldn't matter as much?

I poked at a vsc73xx-based switch in the past and wrote my own test firmware, but had problems with packet loss since I didn't do all the necessary phy initializations I guess, in case this might be of interest: https://github.com/ranma/openvsc73xx/blob/master/example/pay...

Also on the device I had the EEPROM was tiny and the code is loaded from EEPROM into RAM, you were pretty much stuck with 8051 assembly that had to fit into the 8KiB of onchip RAM :)

Looks like the PPKII can do up to 1A.

Similarly, the heatsinking capacity of the battery is designed for charging/discharging losses (say 5% of charge/discharge power).

At least in some cases it is sufficient to change the phone SKU id (which requires temporary rooting) to the Japan SKU id to unlock the Osaifu-Keitai functionality on a non-Japan phone. I'm not sure if this means that the secure element had the necessary keys provisioned all along, or just that the Osaifu-Keitai app then provisions it on first use.

Sadly this is harder than it used to be because with devicetree the flash size is hardcoded, where before it was auto-detected (so previously you could swap the flash and continue to use stock firmware, not you need to compile custom firmware).

Unfortunately I could not get Suica to work on my Pixel 7a, while a fellow traveller with an iPhone had no issue. So AFAICT for Pixels you sadly still need a Japanese device to use Suica in Google Wallet.

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