4 ms·
> weird bit of a drain on the 3.3v You...had current limiting resistors in series for each buttons, right? edit: I think each buttons could be made to registe
by numpad0 3y ago
> weird bit of a drain on the 3.3v
You...had current limiting resistors in series for each buttons, right?
edit: I think each buttons could be made to register the last pressed UNIX time rather than sending out button event, so the host can collect reports and sort out time sensitive aspects "later" in the loop to account for delays and reordering type of issues
- 15457345234 3y agoHow much accuracy do you want? Now you have issues syncing all the SBCs to a timeserver and how much drift their internal clocks have. Some of those things have very vague timing. If timing is critical I'd run all the buttons back to a dedicated device but where you'd find a PLC-alike with 200 inputs polled 'simultaneously' (FSVO simultaneously) I don't entirely know. This is the type of project where very particular issues become annoyingly apparent only after you've chosen a hardware platform.
- geerlingguy 3y agoQuite true. And a few of the hard requirements became a bit softer after we got on-site and ran into the issues that couldn't be solved for lack of time.
- numpad0 3y agoI was thinking more along that rate limit might not be high enough with industrial stuffs, they generally don't like e.g. polling at 125Hz.