Arduino ESP8266 MAC addresses detection

I want to be able, in real time, to detect and store the MAC address of devices that pass through a very large room at any moment throughout a day. That room will have a ESP8266/NodeMCU device on either side of the room and will both detect and upload the following to a single spreadsheet: - timestamp - Device - Access Point MAC - RSSI - SSID - channel This is based on this: [login to view URL]