I use a SmartThings Multipurpose sensor v5 on my 220v dryer.
I have it attached to the side of the dryer via heavy duty Velcro tape. This allows me to remove it and replace the battery. I have the washer right next to the dryer with a ¼ hard rubber pad between them and never picks up any vibration from the washer.
I use a RM rule written by wbcoyote3.public . which has worked great.
Here is a link to his post which has the code of the RM rule that he wrote:
Ignore the fact that the link says Aqara sensor and washing machine. There is a rule here for using a SmartThings Multipurpose sensor on the dryer.
Aqara vibration sensor - washing machine complete
The rule uses a couple of local variables and may be difficult for someone new to RM4 to figure out, but it works great. It actually took me several tries to write it in RM. My variation is a little different; I have it speak on my Echo rather then send me a notification on my phone.
