Please try
ESP.restart().
EDIT
[Note]:I tried it, but after executing ESP.restart(); two or three times, C6 hangs up. To start it up, I need to re-upload the sketch. The cause is still unknown.
Please try
ESP.restart().
EDIT
[Note]:I tried it, but after executing ESP.restart(); two or three times, C6 hangs up. To start it up, I need to re-upload the sketch. The cause is still unknown.