All official notices between landlord and tenant should be in a written format acceptable to the court. The court is generally only interested in information which can be documented and submitted into evidence. (Text messages cannot be documented by the court and cannot be submitted into evidence unless printed. Once printed the information is not verifiable because it can be altered in print.)
The reason neither the landlord or tenant would want to send an official notice by text message (email, facebook, twitter, etc.) is because their is no way to confirm receipt, without the other party issues a reply.