armband disconnects

[zjuwlan]

Hi! When I run the code, the armband disconnected after print ---------

import time
def onPoseEdge(pose, edge):
if pose == "fist":
if edge == "on":
for i in range (0,180,1):
print(i)
time.sleep(0.03)
print("-------------")

I dont know why? It's a simplest code and I dont know what's wrong