I need to implement FitBit in my application. All functionality is working fine. I am able to solve two problems. One is how I can get refresh token and another is how I can get steps between two dates.
did you try this?
GET /1/user/[user-id]/[resource-path]/date/[base-date]/[end-date].json
seems to be exactly what you are looking for... read more here https://dev.fitbit.com/docs/activity/