When odoacer deposed the last emperor in rome, romulus augustulus, in 476, he sent a message to zeno, the emperor in constantinople, acknowledging that zeno was still the emperor over the entire empire?

If you are asking if the statement is true, then it is. Odoacer, whose father was a commander in Attila the Hun's army, sent a message to Constantinople after Romulus Augustulus was deposed that the Roman empire needed only one Emperor. He then proclaimed himself as Italy's representative. Odoacer felt that he reunited the Roman Empire and he became the last Western Roman empire's ruler.