So, in IMG_9434 you are repeatedly switching the pump on-off-on with it set at 0.007 rate? Or, are you only switching it on-off-on when the camera pans to look at the screen?
If you keep toggling the pump on-off-on manually then it will pump at a higher rate since each time you turn it on it will output a small amount.
However, this does not explain what happens at t=~20 in that video. At this point it seemed the pump somehow stayed on for much longer. Something similar happens at the start of 9433. I think these correspond to the entries in your PuTTY terminal saying “Failed transmission test on Pumps 1 times…” This happens if the digital communications with the Pump PCB fail first time around. It seems the software has identified this and is trying to fix it, but is then struggling to disconnect the multiplexer when it comes back around to try doing that communication again. This a hardware problem.
Do you ever see similar faults with turning on/off the LEDS? I.e. when you tell one to turn off/on and it doesn’t do so? If not, then it would indicate that the chip on the pump board is faulty, and so I would ask Labmaker to see if they can replace the pump board.
Potentially we may be able to come up with a software fix that will mitigate the issue so long as it doesn’t happen all the time. It is good that the error is caught in the software, but it seems whatever is wrong with the communication to the pump is subsequently causing the multiplexer issues. Perhaps the following will help diagnose:
1. Go to the function “def setPWM….” in the code.
2. Immediately before the line “if sysDevices[M][device][‘startup’]==0:” (which is near the start of the function) add the following:
if (ConsecutiveFails>0):
print(str(datetime.now()) + ‘ Attempting to retry PWM Transmission’)
Note that in the above there needs to be a tab space indent infront of the print statement.
3. After the line “CheckHighON=I2CCom(M,device,1,8,channels[‘ONH’],-1,0)” inside “def setPWM” add the following:
if (ConsecutiveFails>0):
print(str(datetime.now()) + ‘ Completed retry of PWM Transmission’)
4. Try running the new code and see what is shown in the Putty window when the excess pumping error occurs. I am puzzled by what you are seeing since it SEEMS that the self-correcting code is working (i.e. becasue it doesnt say it Failed the transmission test a second time), however it is evidently not having the desired effect (the pumps aren’t turning off as needed!).
