I have compiled Helium Hydra, Point Release 1 on a Raspberry Pi first model powered by ARM v6. It took about 10 hours to compile all, but now it's fully working and I'm able to use it like a Monero node for my LAN.
The problem is that Monero daemon isn't able to stay in sync, every time it remains behind the blockchain for nearly 500 blocks. Internet connection is fine, the Pi is connected by Ethernet and the daemon on another PC works fine and fast.
With 'top', I can see that CPU usage is fixed over 92%, so it's possible that the Raspberry Pi hasn't enough power to handle a Monero node. Should I consider to switch to something more powerful, like a Raspberry Pi Model 3?
Thanks in advance for answers.