Can you share the output of: tail -f /var/log/myDevices/cayenne.log
Can you try sudo service myDevices restart and followed by tail -f /var/log/myDevices/cayenne.log. Share the entire log files and not just one line.
can you delete and re-add the device from the cayenne dashboard. Share if you get any error while installation process.
No anything response when I click the setting ico，how to delete my pi ?
that is something new. can you private me your email address.
can you try adding a new device directly and see if you get any error while installation process.
I’ve tried it,no error message was seen.
try running telnet mqtt.mydevices.com 1883 and see if you get connected. which raspberry pi model and raspbian are you using?