Smoking weed with asthma, is this okay?

Generally no: While weed doesn't cause as much problems with asthma as tobacco smoke, you really don't know what is in it, and any burned material being inhaled is not good for your longs. That being said, the active ingredients in pot, cannabadiol and thc, may have some bronchodilating properties. You don't know, however, whether the weed has been sprayed with insecticides etc etc. Not a good idea.