I've seen the opposite of Phil, but I think it has to do with certain models.? I can successfully control Samsungs with 232 ports on processors or DM receivers.? Almost every one that has been connected to a 1-way IR/Serial?port, I've had to go back and convert to IR.?

We just received an email last week that IP control is now enabled in all 2017 models with the latest firmware update.? The email contained a "protocol sheet" which didn't have any useful information, but it also said the Control4 driver was complete and they were working with other control companies to get the drivers done.

we have 2 repeaters connected via IP to each other

the PRO3 is RS232 to 1 of the repeaters (tried both)

it just loops whatever we send via rs232 right back

no short in wires, only loops when connected to the Lutron piece

any ideas?

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Hi Fred,

I just tried to DM you, but it bounced, so here's the message:

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Call anytime!! I would put a bet on this being a cabling issue somewhere - maybe a leg tied to ground or mixed up polarity along the way somewhere.

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Unfortunately, I was going to suggest what you said you can't do - wire a stat directly (i.e. No UH-1, no other stats, no star wiring or daisy chains) and check that works.? If it does, then it's a process of elimination.

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We had a report of a faulty stat showing similar behaviour btw...? I? was told they were an older rev of Heatmiser's firmware - though I found that hard to believe as it hasn't changed in *years*.

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Speak soon,

Ol

P.S. I know this might seem a bit extreme, but we have a little USB digital oscilloscope/logic analyser (cost around ?200) which can save a lot of head scratching in these sorts of situations - you can categorically say whether the +VE/-VE lines are behaving on the Tx phase that way (or you might see one line doesn't mirror the other, which suggests an issue) and if that looks correct (i.e. the two traces are almost perfect mirrors of each other) then the most likely explanation the stat itself failing to respond (which could be bad hardware, or this "old" firmware!?)

• Checked RS-485 port settings and pin-outs are correct on Crestron CP3. (pin 2 and 4. pin 1 is not in use)
• Removed any references to this particular port from other programs running in parallel on the CP3.
• Tried swapping polarity (swapping pin 2 with pin 4).
  
• Tried the Y&B connectors on the UH-1's touch pad port, as well as C&D.
• Tried the Y&B connectors on the UH-1's network port (that daisy chains to other UH-1s).
• Used another Crestron processor to rule out any port issues.
• Checked thermostat addresses.
• Connected to another UH-1 on the Heatmiser bus.
• Disconnected all other UH-1s and attempted to control only the thermostats connected locally.
• Connected Crestron directly to a thermostat's Y&B terminations on the UH-1 and attempted to poll that particular thermostat for data. I cannot connect Crestron directly to any thermostat as the Y&B ports have been covered in glue...I imagine to keep wires in place...no sign of any phoenix connectors.

I'm using version 3 of Ultamation's Heatmiser (RS485) module. So Oliver, if you're reading this expect a call from me soon...I must be missing something.

Any assistance greatly appreciated. I've exhausted all possibilities.

Best,

Fred.

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