More than 3 temp and humidity sensors

[paul402]

I bought the Banggood sensors mentioned in this thread viewtopic.php?t=10515
https://www.banggood.com/433MHz-Wireles ... 8820141020
and am very satisfied with them.
But I would like to add more to my system and the Banggood sensor only has 3 selectable IDs. Has anyone enough knowledge to hack them?

Inside under the pads for C/F and and TX is an unused pad. Has anyone enough technical gear like a scope to see if this changes the output in a useful way?

Or should I just buy more sensors from another supplier and hope that they use a different but compatible protocol with the Banggood.

If so who has already done this and found sensors whose signals don't conflict with the Banggood?