Shelly Dimmer I/O Actions

Hi All,

I am trying to get my Shelly 1PM to send URL commands to a Shelly Dimmer 2. Originally this command worked just fine, but for the past few weeks it does not work at all. I have tried rebooting and factory resetting. The command I am using is : http://192.168.xxx.xxx/light/0?/turn=toggle

Any help would be great. Thanks!