Check Network
Before anything else, work out what is providing the network inside your van. See Network planning for which setups work, and why.
What to do
- Keep one thing in the van that provides a network and stays on. It does not need to provide internet, and it does not need to be expensive. It needs to be on whenever you want to use your system.
- If your internet source is also your network, expect the system to go quiet when you switch it off. That is a perfectly reasonable choice to make, as long as you make it knowingly rather than reporting it as a fault.
- Give your Sensa unit a fixed address on any router you control, usually called a static lease or a DHCP reservation. Do the same for your Zigbee coordinator if you have one. This is the single most useful thing you can do.
- Check that your network lets devices see each other. The symptom when it does not is a tablet that cannot reach your unit despite both showing a good connection.