I2cwrite SDA, SCL,$A0,I,[ "T" , "E" , "X" , "T" , "1" ].....
should also work. (not 100% sure, haven't tried myself, but it should work)

What you originally had was an embedded string, which PBP doesn't natively handle. ( "TEXT1" ). A byte array of characters as noted in the post preceeding can be used as a string, but is not really a 'string' as far as PBP is concerned.