I'm using core wallet 0.13.
GUI miner https://guiminer.org/
I need explanation how to start mining?
What to use, bat file Bitcoin.exe - server or bitcoind ?
I had no luck, guiminer response ***NO JSON object could be decoded
CPU and GPU mining for Bitcoin is dead. You will never make anything but will ruin your machine in the process. You need an ASIC miner. The newer the better.