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Raspberry Pi as controller

display and control butttons, found at

relay board for outputs

breadboard prototype incl. temp sensor and indicator LED's


prototype wired together

the Iphone app for the prototype

Rest interface

The rest interface is at http://hottub/htmobile/rest/hottub. The requestor needs to use the correct http method for setting values (HTTP PUT)

For getting REST values use HTTP GET


which gets

 <?xml version="1.0" encoding="UTF-8" standalone="yes"?><blower state="ON"/>

To set the value, use HTTP PUT

 curl -X PUT

which results in

 <?xml version="1.0" encoding="UTF-8" standalone="yes"?><ok succeeded="true"><status>200</status></ok>
 curl -X PUT
 curl -X PUT
 curl -X PUT

Target Development

Final version


connector board schematic

connector board wiring

the connector board backside

the connector board frontside

Temp sensor

Onewire threaded 1/2" NPT