Garage Door Opener & Alert Project

Smart Home Integrations SmartThings
41

Thanks,

Testing #1
A.) Disconnect the red and black wires from the Normally Open relay connections.
B.) Ensure power is applied to garage door opener unit.
C.) Ensure the wires from the wall controller to the garage door unit are connected
D.) Gain access to the back of the wall controller pcb where you solidered the red and black wires.
E.) Using a short wire momentarily touch one side of the short wire to the red wire on the pcb and the other side of the short wire to the black wire on the pcb. Once you’ve made the connection the garage door opener should activate.

Let me know the results.
Greg Gordon

42

 Greg, I tried this morning before soldering. It is activating the garage door.

43

Maxime,

Have you verified the relay works when sctivated. Recommend isolating the relay from the garage door wall conroller. The configuration would the be the relay and the konnected board only. Desire you have 5 volt power to the relay and the konnected board is powered up and configured to trigger the relay. Now using ohm meter measure across the NO and GND terminals on the relay. It should be open or mega ohms of resistance. Next while still monitoring the meter momentarily activate the connect pin controlling the relay and the resistance should go to zero while the relay is activated. If not additional troubleshooting of the relay configuration will be required. Hope this helps.

Greg

44

Thanks Greg ! I will receive my multimeter Friday. As soon as I get It I will run the test and let you know. 

45

Hi Greg, with the multimeter I was able to test the continuity. The relay NO is biping with COM and the NC with COM is not. Connecting to NC in spite of NO and everything is working. From what I understand, those relays are not properly identified.

46

Hi Maxime, Great job identifying the issue with the relay. From the view it does appear the markings for the NO and NC are reversed. The convention typically shows the state of the relay contacts when the relay in NOT energized. 


A couple of thoughts. When you were testing the continuity was the relay powered? If yes remove any power source and test again and see if the results change. Also, is there any type of jumper on pins on the front side of the board. If so it may be used to reverse the logic of the board. If it appears to be marked that way remove and retest. Also a jumper might also me used to select the input power lever as either +5VDC or +3VDC. If you can identify the manufacture and model of the relay we can look for the technical data sheet which should document all the features and functions. Just goes to show you can't always make assumptions. 


Here is a relay that follows that convention that I'm using in my garage door Konnected project. It follows the convention of marking the state of the relay and contacts in the de-energized state. 


Greg