Problem on io7.in

T3P3Tony

@Tinchus something to check then would be the switch with a multimeter to see if you can see it switching ?

Tinchus

@T3P3Tony checked, it is ok. Looks like it is the board, i checked the same sensor on another board and it worked. I will check again the crimps... but could io7.in be damaged, io7.out works ok, it is just that pin. The one "failing# is a board 1.01, the one working ok is a board 1.02. I read docimentation to check if there is any difference, look like it doesn´t

T3P3Tony

@Tinchus if the board is seeing the disconnection from the switch on a plug/unplug, that indicates that the input pin is seeing something. A simple switch in NC mode is electrically no different pressing the switch to plugging/unplugging it.

Please try with IO6 on the same board, obvious changing the config as well.

Tinchus

@T3P3Tony thnaks for the quick answer. Changed to io6.in and it is working, unplugging the switch on i7.in shown no change on the object model value (it is showing always a value of "1")
Anything I can do to check on the board. Everything else on the board is working ok, this one in paricular has been working for 2 years aI think, it is just now that it came yo my mind use io7.in

T3P3Tony

@Tinchus ahh right, I misread what you said previously, i thought it was detecting the plug/unplug event. Which board is it?

Tinchus

@T3P3Tony it is a duet3, version 1.01

Tinchus

@T3P3Tony have a surprise jajajaja. Since I dont know what to measure on the board to check if the pin is faulty or not, I tried on another board, this one is a v1.02. This board has the same exact configuration and the sensor BUT io7.in was being used, so in this case I had io5.in free so I connected the sensor there... and it doesnt work, exactly the same failure like with the other board.

I modified the config in order to use io7.in... and the sensor works perfect.

I go again to the V1.01 board, change config to use io5.in... and works!

This is very strange!
Update: I have tested a third board, V1.01b, in this one io7.in is also failing

Is there any value I can measure on the board or something ??

dc42

@Tinchus with nothing connected to io7 you could measure the voltage between io7_in and ground using a multimeter. It should read 3.3V if the pullup resistor is present.

Tinchus

@dc42 thanks , will chek that . As an alternative: I dont have any other free io.in pin, reading docs says I can have 32 gpin ports. Is that number taking into consideration the use of expansion board or I can transfor and .OUT pin into an .IN pin?

dc42

@Tinchus on the 6HC (but not the Duet 3 Mini) you can use an io.out pin as an input. Use the ^ symbol in the pin name string to enable the pullup resistor.

Tinchus

@dc42 thanks, I this this would be the last: if I use ou7.in for a swich and out.out for the other swith, both will share GRND, right. Any problem with that config?

In formware would be
M950 J4 C"!io7.in"
M950 J7 C"^io7.out"

With this config something is wrong: I connect both switches and the status on the boject model changes. If I activate (manually) the switches, there is no response. Both switches are NC

dc42

@Tinchus if the switches are NC then you should use "^!io7.out" as the pin name for the second one. You should see the value change in the object model when you press the switches.

Tinchus

This post is deleted!

Tinchus

@dc42 Solved. Will check later to see if I can measure what is happening on io7.in and i5.in on those 2 boars, to see if I can measure the values you told me to measure. SHpuld I create a new post or stay here with an update later?

dc42

@Tinchus I suggest you post an update here because it will relate to the original issue that you posted about.