mpleeds wrote:...I had the Trigger Threshold set to 3 during my initial sauna test (running side by side with existing 433 RFX BBQ probe) and noticed that it only reported changes of EXACTLY 1.2° F (not granular enough for sauna temp control). When lowering the Trigger Threshold to 2, readings became very erratic ("thrashing"). Could this be the limitations of the 1124 or a possible bug in the plugin? Based on your comment that the 1124 is not "super stable", I am thinking of upgrading to a thermocouple and Phidgets 1048 sensor with the hope that readings will be more reliable, down to around .5° F.
Thoughts?
A trigger of 3 should be fine. And, at this point (several years) I am certain there is not a bug in this part of the code. BTW, by stability, I mean there is some jitter in the 0-5v output from the 1124, thus the thrashing you saw. One test is to look at the phidget in the Phidget control panel and see what it reports in raw value and then convert that to ºC using the formula
Temperature (°C) = (SensorValue x 0.2222) - 61.111 There could be other factors, such as is the 1124 in open air or attached to something. If it is attached, the heat will change at the rate of whatever it is attached to.
Finally, the 1048 is excellent, but for your application, you shouldn't need it. If you can confirm the 1.2º difference using the control panel, I would suggest calling phidgets support, you may have a faulty 1124. I mention re-creating the problem with their own code to remove the plugin from the issue.