Is it possible to control stairs and staircase area heating systems with one thermostat?

Large stairs and staircase areas can be controlled by a microprocessor thermostat ETO2-4550 with two ground sensors ETOG-55, as two independent zones, based on sensors data.

The smaller staircases can be controlled by the ETR2-1550 thermostat with ETOG-55 ground sensor as one system according to the stair sensor data.