If you just want to be able to control the ACs remotely, without remote sensing, you can buy some cheap IoT IR blasters (around $15–30 for Zigbee or WiFi versio

If you just want to be able to control the ACs remotely, without remote sensing, you can buy some cheap IoT IR blasters (around $15–30 for Zigbee or WiFi versions). They'll often have control schemes you can download for your specific equipment (cloning the IR remote control that came with the AC).