SetupProtocol

Wi-Fi credentials

During initial setup, the modem (e.g. LCW-007) doesn't have access to the user's Wi-Fi network. It opens a SoftAP with a SSID of the format:

• during normal operation: LGE_XXX_yyyy. For example LGE_AC2_1234. The password for this network is yyyy repeated twice, so in this example it would be 12341234
• in some other cases it may happen to be a string like [LG_something]yyyy, for example [LG_Wall-Mount A/C]1234. The password is fixed to 1111122222. This SSID scheme is not understood by the official app, and I guess that it's not intentionally activated, just a bug. It showed up on my A/C immediately after power-on, even before pressing the magic "set up wi-fi" button sequence.

Communications protocol variants

The app was found to support several versions of the setup protocol. Two variants are supported by rethink:

• JSON-based + TLS - supported by various Thinq2 devices
• XML-based + TLS - supported by Thinq1 devices such as WTDN3

The rethink-setup utility will automatically try both options.