Assuming jstefanop et. al. get it running on the Orange Pi Zero, the biggest limitation is the storage space; my node is currently using 24G to store the blockchain, so you'll need a sizable SD card.
It could be more practical to store the blockchain on some USB flash stick since there's an USB port available anyway. That way the SD card size wouldn't matter that much and updating the firmware by fully erasing the card content wouldn't reset the blockchain back to zero (or to some other older snapshot the firmware possibly provides).
Yea this is the main issue we are still trying to figure out with the full node (other than the memory limitations we are still working through). We still want to make it that the whole node runs on the current hardware with nothing extra, but based on how bad the node wears down SD cards we might need to provide an external USB drive solution for better reliability.
Almost done with getting Batch 2 out the door, and my full attention will turn to this...
So pleased to hear that the full node is in the works following the Batch 2 being on their way. Been waiting what seems like ages for this - I want to solo mine my Apollos from now on and mining against a node on the rig is the best scenario (I had considered a VM on my NAS, but I like the thought of this better).
FWIW and for those interested, I was one of the guys running L3's until last week, and with the price action on LTC, I decided to shut down 75% of my capacity and run only my Apollos from here on out. It hurt, but LTC is losing ground immensely and without privacy solution ready for mainnet, I don't think LTC is going to gain ground on BTC.
With the halving and price slumping, I foresee an immediate 25% reduction in hashrate, and 50% over the next six months, unless Charlie Lee pulls mimblewimble out of his hat.