ccminer -a decred -o stratum+tcp://yiimp.ccminer.org:4252 -u DECRED_WALLET_ADDRESS -p xx

your wallet adress must be a decred adress. (yiimp doesn't support autoexchange to BTC)

for autoexchange you can use:

ccminer -a decred  -o stratum+tcp://mine.zpool.ca:5744 -u BTC_ADDRESS -p xx

But the hashrate on the pool is low. (longer time to find a block to get payed)