I had a pile of 20 older banana pi laying on my desk for well over six months, as I was not sure what to utilize them for. The project they had been used for in Micronesia, Solar Powered Digital Libraries, was upgraded to Raspberry Pi3’s. By chance, I came across this article by NovaSpirit Tech using Raspberry Pi3s for CPU Crypto Mining. I thought perfect, I will set up each of the Banana Pis for mining. The NovaSpirit site: https://www.novaspirit.com/2017/10/19/crypto-mining-sbc/
I had a stack of 4gb SD cards from a past project, so I reformated them with ApplePi Baker and burned the latest image:
Once the updates and upgrades were performed, I follow the NovaSpirit instructions. It was not hard, with the only change in the compiler setting for the ARM cortex 7a processor vs the Raspberry Pi3’s cortex-a53. So I used mcpu=cortex-a7 for the Banana Pis.
In my set up, I also used Bullmining.com mining pool. Once the bullmining account was set up, I added 20 workers. The settings were straightforward for each of the Banana Pis.
./minerd -a m7mhash -o stratum+tcp://xmg.bullmining.com:3333 -u Weblogin.WorkerName -p WorkerPassword
I also had two Orange Pi zeros and a Pine64 laying around and set the compiler for their ARM cpus and added two more workers to bullmining.
Now I am CPU mining away with 22 Pi computers!