Remote access from Cloud NodeRED to Tuya Bridge

Developing Nodes
1

Hey there,
I have the following scenario:
I would like to implement smart home for my grandmother.

  1. From my home I connect the NodeRED in the cloud with the local Bridge. (how ?! :smiley: )
  2. I send the bridge to my granny and she connects the bridge using the Smart Life App, so she can share her local WiFi to the bridge.
  3. As soon as the bridge is in her WiFi, i immediately can connect from my Cloud NodeRED to the bridge and control her devices.

Basically what i'm thinking of is to use the 'remote function' that the mobile smartphone application (Hue/Tuya/SmartLife etc..) is using by user credentials. That would be the 'normal' way. In my case the smartphone is the cloud NodeRED.

How can this be done ? Please think of that scenario without using a RaspPi, if possible.

Best regards,
Marc