Is it possible to connect to an SSID that does not require a password? My project using ESP8266-01 modules will sometimes be used in non-password protected guest networks.

  • yes, just skip the password. it works. – dandavis Jan 11 '18 at 22:03

Yes it works! You can use:

WiFi.begin(ssid, NULL)

or even leave the passphrase empty, because it's optional:


Reference: https://www.arduino.cc/en/Reference/WiFiBegin

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