Updated and testing:
As far as I can see, the status of the msg100 stays online. There are (correct) spikes to offline at my daily reboot and the daily internet reconnect. It seems to work.
Currently I have a problem that my ms310 wall outlet is stated as offline. Although I can control it.
This could be a side effect of a mail a got (so nothing for you to do):
This is meross cloud security team contacting you.
First of all, thanks for purchasing meross and we hope that you enjoy life with our smart products.
Recently our cloud security system has noticed that your devices are communicating with the could server at an extremely high frequency. We consider these behaviors abnormal and are concerned about the security of your devices.
Due to the security concerns and the intent to avoid any further potential damage, we will terminate the cloud services of these devices for now.
If you are sure that your devices are safe, NOT hacked, and are performing as expected. Please first lower your periodic request rate to no more than one message every ten seconds and then send an email to firstname.lastname@example.org. We will resume cloud service for you within 24 hours. Please note that any abnormal high cloud request frequency will cause cloud service termination again.
Should you have any information you would like to provide us with or would like to offer us any clarification, please contact us within 24 hours.
meross Cloud Security Team