Hi,

meanwhile I found a "solution" based on this post.

I did an

apt-cache policy unipi-kernel-modules

which revealed the available version names.
Followed by

apt install unipi-kernel-modules=1.106.1.20220308~buster-1

it installed the previous version and all is smooth again.

Still, this is a workaround but not a solution.

/KNEBB

@Achilleas-Kotsis

Thanks for your hints about downgrading. Worked for me, too.

For reference the commands here:

apt install unipi-kernel-modules=1.106.1.20220308~buster-1

I got the version by apt-cache policy unipi-kernel-modules.

/KNEBB

@cleve
Thanks for letting me know.

To be honest- there is no urgent need for upgrading.

I just prefer to be on the up-to-date version knowing the old stable gets outdated faser than expected ;)

Do you have an estimation when it might be available for Trixie?

Thanks!

/KNEBB

Hi,

my Neuron is working based on the BaseOS image. Which is Debian12.

As Debian13 just popped out and I already upgraded my other Debian12 machines I am thinking of upgrading my Neuron M103 (old) to Debian 13.

Is this suitable and recommended?
Or do I have to wait until some repositorities are up-to-date for Trixie?

Thanks!

/KNEBB

@cleve

Neuron M103 (the old one, not the current) which is still running with Raspbian 10/ buster.

How do I get the information about the firmware?

(BTW: I tried to upgrade to latest Raspbian, but failed)

Hi,

on my M103 (old model) I have attached to my analogue input a sensor which delivers 0-10V.
I can read this voltage through modbus. So far, everything is fine.

I am just wondering why it works ;)

Register 1024 is supposed to configure the type of measurement:

However, register 1024 always shows "0" for me, while the input rating shows the right voltage.
My code:

union   {
        uint16_t word[2];
        uint32_t dword;
        float flt;
} wert = 0;
err =  modbus_read_registers(connection, 1024 , 1, &wert.word[0]);
printf("[read_ai] Wert: %d",wert.dword);

// Now read the voltage:
err =  modbus_read_registers(connection, 3002 , 2, &wert.word[0]);
printf("[read_ai] wert.flt: %5.2f",wert.flt);

Output is:

[read_ai] Wert: 0
[read_ai] wert.flt: 3.00

So value 0 mean "disabled". But it still reads the voltage. Shouldn't it be at "1" for the default mode of measuring voltage?

/KNEBB

Hi,

I own a Neuron M103 (the old one, not the current) which is still running with Raspbian 10/ buster.

I want to control my AO and read AIs through Modbus with my C-code.

I remember there was a calculation how to get to the value to be written to the register. Somethins with deviation, offset and so on. Mentioned here. But I was unable (or to dumb) to find any up-to-date documentation.

Checking the latest register map I see register 3000& 3001 marked as "Basic" for the value.

So I was able to set (and read later) a voltage to 5V through:

union   {
        uint16_t word[2];
        uint32_t dword;
        float fl;
} wert;
wert.fl = 5;
ret = modbus_write_registers(connection, 3000, 2, &wert.word[0]);   

Am I right I do not need those mentioned calculations any more and I can set the value (float between 0 and 10)?

Thanks!

/KNEBB

Replying to mysqlf as I found a nice guy who did the cabling for me.
As I want to control two vents the wiring has been extended accordingly:

So for each vent I need a 47k resistor and a 12V diode.

That's it! Easy for someone who knowns. Impossible to do it for me.

/KNEBB

Hi,
I am struggling with controlling a fan with PWM.

By documentation of the fan a frequency for the signal from 1kHz up to 10kHz is supported. So I used 4kHz here.

I have read the KnowledgeBase article regarding PWM but it does not bring any light in here.
I checked the Neuron M103 register map.

So I use the following values:

• frequency = 4kHz = 4,000Hz
• resolution = 11 (want to have 0,10,20,...,100 as percentage)

I can not set these values directly to the registers, instead I have to use a "prescaler and a "cycle length" according to the Neuron modbus documentation above.
These values are to be calculated (again, see first linked doc) as follows:

PWM_Cycle = resolution - 2

                          4.8 * 10^7
PWM_Prescale = ------------------------------- - 1
                frequency * ( resolution - 1)     

So in my case I get the following calculated values:

• PWM_prescaler: 1199
• PWM_Cycle: 9

Both am I setting without any errors to the documented registers 1017 and 1018 (in C):

err = modbus_write_register(conn, PRESCALER_ADD, prescaler);
err = modbus_write_register(connection, CYCLE_ADD, cycle);```

Fine so far. Now I want to set the digital outputs according to any desired percentage value steps (0, 10, 20, ..., 100).
These are registers 16, 17, 18, 19 according to the DO numbers.
But which value am I allowed to write to these registrers?
There was a forum post where @tomas_hora stated:

The PWM value register takes values from zero to the number in the PWM cycle register.

So in my case the PWM cycle register has a value of "9" according to above calculations.
So I should be allowed to use values 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
But there are only 10 values and I do not know which percentage they match to.
I assume 0 equals to 10%, 1 to 20% and 9 to 100%, right?
If so, how do I tell the digital output to set "0"?

Or is 0=0%, ... 9=90%?
Again, if so how do I set 100%?

Any hints?
Thanks a lot!

/KNEBB

Hi guys,

I have a fan which can be controlled by 0-10V or PWM. As I am struggling with electronics I prefer the easiest way without diodes or similar.
I own a Neuron M503 which has an analogue output of 0-10V or PWM. Additionally I have a 48V power supply for the fan.

Here are the possible connections for the fan:

Can you guys tell me the wiring cable to get this fan controlled by Neuron (settings the modbus parameter is not a problem)?

Thanks a lot!

/KNEBB

@cleve
Thanks for replying.

I will try the update again and create a new topic in case it fails.

/KNEBB

Hi,

I am still on Buster (Update failed), my Evok Version ist 2.4.34. Usually I do not need Evok but I wanted to test something manually without writing code.

So I started with systemctl:
systemctl start evok and after this I can see port 808 is LISTENing (was not before):

root@neuronm103:/usr/src# netstat -anp| grep pyth
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      20899/python        

But when I use my browser I am getting a "404: Not Found" error. I tried to look into the logfiles but there is nothing related.
In /var/logthe following files are empty:
evok.log
nginx/*log

Anyone having an idea how to get it up and running?

Thanks!

/KNEBB