WiFi
connect()
Attempts to connect to the Wi-Fi network. If there are no credentials stored, this will enter listening mode (see below for how to avoid this.). If there are credentials stored, this will try the available credentials until connection is successful. When this function returns, the device may not have an IP address on the LAN; use WiFi.ready() to determine the connection status.
// SYNTAX
WiFi.connect();
Since 0.4.5:
It's possible to call WiFi.connect() without entering listening mode in the case where no credentials are stored:
// SYNTAX
WiFi.connect(WIFI_CONNECT_SKIP_LISTEN);
If there are no credentials then the call does nothing other than turn on the Wi-Fi module.
On Gen 3 devices (Argon, Boron, B-Series SoM, and Tracker), prior to Device OS 2.0.0, you needed to call WiFi.on() or Cellular.on() before calling Particle.connect(). This is not necessary on Gen 2 devices (any Device OS version) or with 2.0.0 and later.
On the Argon, starting with Device OS 1.5.0, a quick Wi-Fi scan is done before connecting. The list of available networks is compared with the configured SSIDs. The access point with the strongest signal is connected to. Prior to 1.5.0, only the original access point BSSID that was configured would ever be connected to, even if there was a different access point on the same SSID and network with a stronger signal.