By default, the modbus version of the AirGradient ONE does not open the WiFi manager for wifi connection as this could be misued if the monitor is connected through modbus.
Please note that below is only applicable for the 8PSLM model.
To open the WiFi manager, please follow this approach:
Push the button
LED test is executed
Release the button
Monitor attempts to connect to network
Monitor starts WifiManager in case of timeout in 4
Configuration mode remains active for 15 minutes