I need to work on a project where multiple objects need to exchange trough wireless protocol and they are near to High frequency TIG welding machine. All objects works by pair (one emitter and one receiver) and they are up to 20 pairs in the same area (something like 30 or 50 square meter) Each pair do not have to interfer with other pair of objects and they have to not be interfered by the TIG welding machine.
Should I better use WIFI or Bluetooth protocol? Range is not an issue as each object of a pair is not far from the other object of the same pair.
For what I found, High frequency TIG welding is given to 1Mghz