Temp probes report 0.0 degrees momentarily.

[mudcat1]

I am currently using 2 temp probes on a Reef Angel standard controller (generation 1). I am having a reoccurring problem with my 2 temp probes. They will a few times per day momentarily report 0.0 degrees. I think the probes report "Error" on the Reef Angel console when this occurs. I am using the email notification (via the Client Portal) to notify me when the sump or room temperature drops below 73 or 65 degrees respectively.

I also noticed that if I add a 3rd temp probe, each of the 3 probes display "Error" at different times. I am trying to determine why this is occurring.

I have read in other posts that each temp probe is etched with a unique number by the manufacturer. Is there a command to display the unique manufacturer number of each temp probe? I want to eliminate the possibility that I have temp probes with the same manufacturer (non-unique) numbers.

[rimai]

There is only unique ids.
One probe can never have the same id as another one.
But, if you need the address, they are stored on ReefAngel.TempSensor.addrT1[8], ReefAngel.TempSensor.addrT2[8] and ReefAngel.TempSensor.addrT3[8]
The problem could be related to the weak pull up on gen1 units. Placing another resistor in parallel should solve the issue. You need to connect the legs of the resistor on the center pin of the temp sensor conenctor and VCC (the left pin if you are looking at the connector and holding the controller with it pointing at you).

[mudcat1]

There is only unique ids.
One probe can never have the same id as another one.
But, if you need the address, they are stored on ReefAngel.TempSensor.addrT1[8], ReefAngel.TempSensor.addrT2[8] and ReefAngel.TempSensor.addrT3[8]
The problem could be related to the weak pull up on gen1 units. Placing another resistor in parallel should solve the issue. You need to connect the legs of the resistor on the center pin of the temp sensor conenctor and VCC (the left pin if you are looking at the connector and holding the controller with it pointing at you).

Roberto, is the resistor that you are referring to an existing resistor that already exists in the Reef Angel?

If it is a new resistor that I need to add what size resistor is required?

Thanks,
John

[rimai]

There is one already, but it may be too weak of a pull up.
The gen2 has a much stronger one.
You have 2 choices. Replace the SMD one or connect a through hole resistor to the temp probe pins.
It's currently 10K for the gen1. If you use another one of 10K in parallel, you will make it twice as strong.