jerdam Posted September 24, 2012 Report Share Posted September 24, 2012 Hello everyone, I have a chinese hot tub which has an rs232 cable connection what is connected with control panel GD-3003 (http://www.mrtubby.co.uk/gd-3003-chinese-topside-hot-tub-control-panel-140-p.asp). Is there a possibility to control a hot tub heater, temperature, pumps, etc. with rs232 cable connected to computer or some other brand of control panels which has more options? any help suggestion is appreciated Quote Link to comment Share on other sites More sharing options...
PreservedSwine Posted September 25, 2012 Report Share Posted September 25, 2012 Doubtful- you'll need to connect it with something you know works- just because the plug uses the same type of interface doesn't mean it's compatible- many topsides of the same manufacturer use different communication protocol language. Don't buy unless you *know* it's compatible. Quote Link to comment Share on other sites More sharing options...
KE4NYV Posted September 25, 2012 Report Share Posted September 25, 2012 If you have a multi-meter or even better an oscilloscope, put it on pin 2 and see if you are getting either ~12VDC RMS with the meter or you can see ~24Vp-p with the scope. If you can, then there is a good chance the signals are RS232 serial. At that point, connect a computer running a terminal program like HyperTerminal (built into Windows XP) and see if you can see any data. You'll have to play with the baud rates to see what it's set at, but it's probably 4800 or 9600 baud. Of course, this is ALL pending on the chance that the controller is periodically spitting out serial data on this port. It might require seeing a command first, before talking. It's worth a shot though. Quote Link to comment Share on other sites More sharing options...
Roger Posted September 25, 2012 Report Share Posted September 25, 2012 If you have a multi-meter or even better an oscilloscope, put it on pin 2 and see if you are getting either ~12VDC RMS with the meter or you can see ~24Vp-p with the scope. If you can, then there is a good chance the signals are RS232 serial. At that point, connect a computer running a terminal program like HyperTerminal (built into Windows XP) and see if you can see any data. You'll have to play with the baud rates to see what it's set at, but it's probably 4800 or 9600 baud. Of course, this is ALL pending on the chance that the controller is periodically spitting out serial data on this port. It might require seeing a command first, before talking. It's worth a shot though. Ummmmmmmmmmmmmmm My head hurts. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.