CNX-Software just posted that H2 based Orange Pi Zero appeared on Aliexpress for $7. It has been showcased here before, but now is on sale officially, though I can't find 512MB version on the store pages.
I'm eager to try 256MB version as my home IoT hub (mosquitto + nginx + uwsgi + Twisted, with MySQL database running on Zyxel NAS). It started with OPi PC then I switched to OPi One but I see it still can be lower spec device.
Consumption update: All settings below made with 'IoT settings' (DRAM downclocked to 132 MHz, USB turned off):
- only Ethernet active, idle: below 500 mW (475 mW measured)
- only Wi-Fi active, idle: below 550 mW (450-520 mW measured, please keep in mind that actual consumption depends on your environment)
- both Ethernet and Wi-Fi disabled, idle: below 410 mW (400-410 mW measured)
That means in featureless mode OPi Zero consumes almost as less as an RPi Zero but more importantly in connected situations (be it wired or wireless) consumption is way below RPi Zero since there adding USB Wi-Fi dongles or an USB Ethernet adapter adds significantly to overall consumption).
This also means that difference between Ethernet active and disabled is just 70 mW (we saw 200 mW with all other H3 boards so far, the difference might be due to H2+ not featuring Gbit Ethernet capabilties any more and/or different Ethernet magnetics on this board).
All in all that looks really promising. A board that performs at RPi 2 level keeps real-world consumption below RPi Zero level while having almost RPi 3 feature set (Wi-Fi + Ethernet, but here Ethernet is not hanging off USB but is real, and here we have 4 real USB ports that do not have to share bandwidth). Combine that with the PoE option we can only hope that Xunlong will start to solder 1 MB SPI NOR flash as default in the future, then this board would already be perfect.