[USB3105 and raspberry pi4b]

Hi @JRys,

 

ok, seems a good option. I will tell the result !

 

Regards,

Gregoire

[USB3105 and raspberry pi4b]

Hi @JRys,

 

this is 32-bit bullseye, RPI 4b 4Go.

 

For the test, I have switched the pi4 with a RPI 3b (so not my usual pi 3b+) with raspian buster.

My set up has run overnight, no connection loss.

 

I have another setup equipped with raspberry pi 4b and one usb 3105 (and one usb 2408) which was ready for test. I tested it yesterday evening and same issue.

[USB3105 and raspberry pi4b]

Hi @JRys,

 

thanks for your answer !

Just after posting my message I actually tried to lower the update rate. Before was 160ms to update the 16 channels, I tried 800ms (50 ms between each channel) and leave it overnight but same result.

Only restarting the program is enough to have 30 minutes of working time.

I am controlling apparatus requiring a 0-10V analog control voltage (very low current consumption).

The environment is the same as when I was using a raspberry pi3b+ successfully. And we have built a dozen of this system working well with the rasp pi3b+. But since it is going to disappear we have to switch to pi4.

Still it is worth to try ferrite filters.

 

[USB3105 and raspberry pi4b]

Hi,

 

I am facing some issue with an usb-3105 board controlled with a raspberry pi4b.

Until now, I was controlling this board with a raspberry pi3b+ / OS Raspbian buster lite through a python software.

 

Recently I have switched to raspberry pi4B 4Gb with raspiOS bullseye lite.

Python software is the same.

Since then, I am experiencing connection loss with the 3105 board.

For information, I am updating the output values every 10ms (so 160ms to update all 16 values).

It happens randomly after more or less 30 minutes of use.

I also have an USB 2408 in my setup which works fine.

 

If I close the connection with the board and open it again, it works fine again until next connection loss.

 

Here is the error message I get:

 

Exception in thread Thread-2:

Traceback (most recent call last):

File "/usr/lib/python3.9/threading.py", line 954, in _bootstrap_inner

self.run()

File "/home/pi/rackcc/rackccscan_temp_v1.0.0.py", line 757, in run self.aocards.setAO(chan, self.allpoints[chan])

File "/home/pi/rackcc/rackccscan_temp_v1.0.0.py", line 309, in setAO

self.all_ao_cards[card_to_set].a_out(int(physical_channel_to_set), self.output_range, AOutFlag.DEFAULT, float(out_val))

File "/usr/local/lib/python3.9/dist-packages/uldaq/ao_device.py", line 81, in a_out

raise ULException(err)

uldaq.ul_exception.ULException: ULError.DEV_NOT_CONNECTED: Device not connected or connection lost

 

 

Have you experienced such a problem ?

Thanks for your help.