Try the halo sack and rain app it worked for us he would keep hisself awake with his rocky arms unless I put him in the sack now he sleeps 4 hr at a time

If your breastfeeding place a shirt on the mattress one with milk stains that way baby will smell you and feel secure that's the only way my son would sleep in the bassinet the first few weeks

you just need to be consistent no matter how many tries it tskes..