Hi,
Is there any possibility to read the state of an (relay) output of a Home Automation HAT in node-red?
I want to do this so after a restart of the controller I can read the current state of the outputs.
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]This is a seperate topic - however I can't an option to create a new thread. I have an issue with the HAT seemingly becoming unavailable after a period of time (the period varies from 5 seconds to several minutes). I have written a few Python test scripts to read the relay status's and a couple of One Wire Bus temp sensors - the error is indicating a loss of comms to the module. The HAT was shipped to me a few weeks ago so I assume it is the latest firmware and I have updated the ioplus stuff from Github. I am struggling to understand precisely what is happening - is there a debug switch I can throw programmatically to get an understanding why it seems to lose comms?
Traceback (most recent call last):
File "/usr/local/lib/python3.9/dist-packages/libioplus/__init__.py", line 197, in getRelays
val = bus.read_byte_data(DEVICE_ADDRESS + stack, RELAY_VAL_ADD)
File "/usr/local/lib/python3.9/dist-packages/smbus2/smbus2.py", line 435, in read_byte_data
ioctl(self.fd, I2C_SMBUS, msg)
TimeoutError: [Errno 110] Connection timed out
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/vk4rtt/vk4rtt/read_hat.py", line 29, in <module>
print(io.getRelayCh(0,1),io.getRelayCh(0,2),io.getRelayCh(0,3),io.getRelayCh(0,4),io.getRelayCh(0,5),io.getRelayCh(0,6))
File "/usr/local/lib/python3.9/dist-packages/libioplus/__init__.py", line 212, in getRelayCh
val = getRelays(stack)
File "/usr/local/lib/python3.9/dist-packages/libioplus/__init__.py", line 200, in getRelays
raise Exception(e)
Exception: [Errno 110] Connection timed out
Hi Peter,
Increase the frequency of the Raspberry Pi I2C port to 400k.
For some use cases, solve the problem.
Alex.
