Ouputs always ON/Green

Chrescht · April 25, 2023, 7:48pm

Hello All,
I have 8 Ouputs over GPIO pins to switch a relay board. It worked.
After i installed mosquitto it was also working but after a few days now without doing anything and without changing something, all my Outputs are always ON(Green) and i can not switch them off. Functions are deactivated. Raspi reset does not bring any changes.
Is the Problem coming from the Raspi or is it Software related?
Thanks for your help
Best regards
Christian

KyleGabriel · April 25, 2023, 11:04pm

Hi Christian,
You can see in the GPIO On/Off Module code that it is receiving the GPIO pin status from the RPi.GPIO python module (the actual state of the pin):

github.com

kizniche/Mycodo/blob/44ac00b5f973c140d85c558e752f75ebd49832e0/mycodo/outputs/on_off_gpio.py#L182-L188


      
          def is_on(self, output_channel=0):
              if self.is_setup():
                  try:
                      return self.options_channels['on_state'][output_channel] == self.GPIO.input(
                          self.options_channels['pin'][output_channel])
                  except Exception as e:
                      self.logger.error("Status check error: {}".format(e))

So you will have to investigate why your board is responding that the pin is held in a position (high or low) that you’ve indicated is active.

Chrescht · April 26, 2023, 4:16am

Thx Kyle,
I will check that.
I just discovered that the control LED on the Relay Board is not full bright and it does not switch the Relay. So it looks like that the Outputs are in a “kind of” High Status.
And my Co2 and Hunidity Sensor on the I2C bus are not working either.

MadMac · April 30, 2023, 5:02pm

check the power supply !
had same issue …
the relay likes extra power…
if you have it all connected to the PI with 3A power it’s often not enough…
works some time than it stops…
i’ll used a seperate power adapter to power all those devices…
one for PI one for all connected devices…
since than no issues anymore…
M.

KyleGabriel · April 30, 2023, 7:09pm

Especially if it’s a Pi 4, which draws more power than any other Pi.