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Cal Spa Connector

In The Internet of Spas, I briefly explained how commodity IoT hardware could be used to connect a (dumb) spa to the Internet, using the empty RJ-45 port found on most Balboa spa controllers.

At that time, I only had the opportunity to connect the port to a logic analyzer to see the kind of messages the controller was sending. In a way, I could understand the current status of the spa but not control it remotely. In this post, I will document the complete interface and how you can control the various features similar to the Top Side display interface.

It all starts with the RJ-45 connector and what the various pins are connected to: Continue reading "Cal Spa Connector"