Temp sensor output?

I have an unconventional heating/cooling system for our home that does not allow me to add my own thermostat but i have a problem where the tempature sensors are in an unriliable spot (the air return) and given how our house was built i am unable to move them. i found a way that looks nice to read tempature in the rooms in a spot that is accurate but i cant find a way to inject it into the thing wirelessly through home assistant (i need the temp accessable in HA for a future project) I do however have easy access to where i can replace temp probe wires (ill send a photo in a min) and im wondering if there is a way to send a signal of the temp sensors through home assistant into those wires instead of the current sensors