AqualinkD: Nothing read on blocking serial port

[matthewhadley]

I have been using AqualinkD successfully for a few years - installed on a Raspberry Pi 4 using the suggested USB to RS485 Serial Hardware.

At some point at least a year ago I noticed that the pool pump would randomly turn itself off. This happened enough that I wrote a Home Assistant automation to restart the pump when it happened. I recently correlated instances of this happening to seeing this message in the aqualinkd logs:

Jan 11 11:39:51 raspberrypi aqualinkd[15514]: AqualinkD: Nothing read on blocking serial port
Jan 11 11:39:51 raspberrypi aqualinkd[15514]: AqualinkD: Aqualink daemon looks like serial error, resetting.

When this reset happens, any running equipment is shut off.

I have managed to capture log output of this happening while logging in DEBUG_SERIAL. The attached log excerpt has the error at line 4275, timestamp Jan 11 11:39:51
syslog_serial_debug.txt

Also attached is my aqualinkd.conf
aqualinkd.conf

In terms of box setup, I used to have an iaqualink 2.0 attached to the system, but have removed that and only use AqualinkD to control the system

The usb to serial is connected to the top left connector shown in the image (yellow and orange wires) and the Pi is the enclosure at the bottom of the box:

I used to have the aqualinkD connected on the right initially (with the iAqaulink 2.0 on the left). The system has a variable speed pump, with the speed values controlled by the relays. The system also has a SWG and similar to the pump that is just controlled as ON or OFF via a relay.

If it's useful, here's the output of serial_logger

./release/serial_logger /dev/ttyUSB0
AqualinkD serial_logger V2.7
Notice:  RS Serial: Port /dev/ttyUSB0 low latency mode is set
Notice:  Serial Log:Logging serial information!
Please wait.|

Notice:  Serial Log:RS485 interface received 800 packets in 61 seconds ( 13.11 Msg/Sec)
Notice:  Serial Log:Jandy Control Panel Model   :  RS-8 Combo
Notice:  Serial Log:Jandy Control Panel Version :  REV T.2
Notice:  Serial Log:Jandy ID's found
Notice:  Serial Log:ID 0x60 is not used  <-- can use for Aqualinkd (PDA mode only)
Notice:  Serial Log:ID 0x08 is not used  <-- can use for Aqualinkd
Notice:  Serial Log:ID 0x30 is not used  <-- can use for Aqualinkd (Prefered Extended Device ID)
Notice:  Serial Log:ID 0x31 is not used  <-- can use for Aqualinkd (Prefered Extended Device ID)
Notice:  Serial Log:ID 0x32 is not used  <-- can use for Aqualinkd (Prefered Extended Device ID)
Notice:  Serial Log:ID 0x33 is not used  <-- can use for Aqualinkd (Prefered Extended Device ID)
Notice:  Serial Log:ID 0x48 is not used  <-- can use for Aqualinkd (RSSA ID)
Notice:  Serial Log:ID 0x09 is not used  <-- can use for Aqualinkd
Notice:  Serial Log:ID 0x0a is not used  <-- can use for Aqualinkd
Notice:  Serial Log:ID 0x0b is not used  <-- can use for Aqualinkd
Notice:  Serial Log:ID 0x40 is not used  <-- can use for Aqualinkd (Extended Device ID)
Notice:  Serial Log:ID 0x41 is not used  <-- can use for Aqualinkd (Extended Device ID)
Notice:  Serial Log:ID 0x42 is not used  <-- can use for Aqualinkd (Extended Device ID)
Notice:  Serial Log:ID 0x43 is not used  <-- can use for Aqualinkd (Extended Device ID)
Notice:  Serial Log:

Notice:  Serial Log:Suggested aqualinkd.conf values
Notice:  Serial Log:-------------------------
Notice:  Serial Log:panel_type =  RS-8 Combo
Notice:  Serial Log:device_id = 0x08
Notice:  Serial Log:rssa_device_id = 0x48
Notice:  Serial Log:extended_device_id = 0x30
Notice:  Serial Log:-------------------------

I am looking for any thoughts/help on how to fix the serial problem that is causing the resets. It can happen a few times a day, or sometimes not at all. I have a backup USB to RS485 Serial device that I can try switching in...

Thanks for any help!