Re: shell object on Raspberry PI 4, GPIO control via pinctrl

Thanks for the hints. In the meanwhile I „solved“ the issue by simply creating enough shell objects to run my commands separately :) this works very well for my application as well. Will checkout [command], thanks.



> Am 22.02.2026 um 02:20 schrieb Roman Haefeli <[email protected]>:
> 
> On Sun, 2026-02-22 at 01:18 +0100, Simon Iten wrote:
>> 
>> However if I send multiple pinctrl commands in a short timespan some
>> are dropped.
> 
> Yeah, [shell] can only execute one command at the time. When [shell] is
> still busy with the last command, it'll simply ignore the current call.
> 
> Anyway, you may want to try [command] which is a fork of [shell] with
> more features. [command] outputs the exit code when the execution of
> the command has completed. However, you still need to buffer your calls
> so that they are executed one after another. You'll find [command] in
> Deken.
> 
>> Also, running pinctrl set 5.6.13 op dl for example does not work (it
>> should pull low those three outputs at once and works in the terminal
>> just fine) But PD also automagically adds spaces after the commas
>> once the message box is not edited anymore.
> 
> That's not a [shell] specific issue, but is how Pd parses messages in
> general. A comma in message box is actually a delimiter for messages.
> By using unescaped commas you actually create multiple messages
> 'pinctrl set 5', '6', and '13 op dl'. 
> 
> 'exec pinctrl set 5\,6\,13 op dl' seems to work with [command]
> 
>> 
>> Are these known limitations of shell or is there a workaround to run
>> multiple commands at once? Adding & or ; to the end of the message
>> sent to shell does not work...
> 
> I don't know about &, but ';' is also a Pd delimiter for sending
> messages.
> 
> Roman
> 
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