On 21/01/2021 09:50, Terry Coles wrote: > On Thursday, 21 January 2021 09:25:02 GMT Hamish McIntyre-Bhatty wrote: >> This is a very interesting product. That said, I agree with you Terry in >> that I think it would have been hard to even get Ethernet to work with >> something like this, let alone talking to a MySQL database - probably >> unsuitable for the River System, or at least the direction it went in >> given the hardware we had at the time. > At the time, there was no thought of networking the devices; this was when I > did the lighting controller. This would have been perfect for that because > in > the end I was unable to get PWM to work without flickering using Python > because > the GPIO Library didn't (doesn't?) support the hardware PWM on Pin 18. I > got > it working with WiringPi and C, although the C code is hardly rocket science > with only around 160 lines of code around a third of which are comments. > > The train controllers would have been a perfect choice for this , but I > couldn't have used it for any of the four audio players on the site. I agree > with you that we certainly would have struggled to develop the software for > the River System in its present form. > > From a hardware standpoint we would have been fine for any of the River > System > devices if USB networking could be made to work. If I were starting today, > I > would seriously consider using a Pi Zero at each location to do the grunt > work, connected to the Pico's using USB Networking, like I've just done on > the > new Minster hardware.
That's true, if USB is fairly functional that perhaps USB NICs could be made to work. It will still need a TCP/IP stack though. What would the Pico's be doing in that design? All the hardware-related stuff like interfacing with probes? I realise this is very much a hypothetical discussion, but still interested :). Does the USB Raspberry Pi networking work well for the new Minster system? Hamish
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