A Wi-Fi signal strength mapping tool using a Xiaomi Roborock S55 vacuum robot.
For details, see
Upload the two python scripts inside run_on_vacuum to the vacuum robot
Execute extract_pos as a background process
E.g. python3 extract_pos.py &
When the vacuum cleaning starts, it will produce a maps.csv file in the same directory where extract_pos.py is located at.
Start vacuum cleaning. When finished, copy over the maps.csv file to the computer. Use any handy heatmap generator to process the maps.csv file to generate the required heatmap.
If there is no Wi-Fi signal at all, the Wi-Fi connection on the robot will disconnect and extract_pos.py may block and not giving any output. This is until the Wi-Fi connection of the robot re-established.