On Wednesday, 19 September 2018 10:12:56 BST Ralph Corderoy wrote: > You need a USB to UART convertor for you laptop to the Pi's serial port. > I think this has been suggested before? :-) https://ebay.to/2xxRNKi is > the kind of thing, but be careful to connect it up correctly.
I don't think I've ever seen that before. However, I'm not sure what problem it's solving in this context. When we connect a laptop, we use a Wireless Router re-purposed to act as a Switch on the main Pi network and a router for the WiFi (which plays no part in the functionality of the system other than to gives us a convenient way to download files containing Readings of water levels etc). The adaptor I need is to allow us to form the main network. Clearly that device could be a way to get us an extra USB port, but would consume the four GPIO pins that we will probably be using to carry the readings and control signals between the Pi and the sensors, valves and pumps. We have solved the problem of how to interconnect the Pis using simple USB Ethernet connectors. The only question now, before I spend quite a bit of our budget, is to get one that works > It gets a mention. > https://elinux.org/RPi_USB_Ethernet_adapters#Problem_Ethernet_adapters > Some good ones are also listed on that page. That's a useful page. Thanks. > You can check the USB version used for a device by looking at the > `bsdUSB' field in the output of `lsusb -v'. It comes up in dmesg when the device is plugged in too. > Perhaps the non-Davicom device is robust enough to cope with, and > workaround, the problems of the Davicom? Can you come up with something > that makes it fail quickly and consistently, and then do multiple tests, > tracking which adapter is in use at which Pi, and see if there's a > pattern, as well as what arrangements you haven't yet tried. I will be looking into this when this week's activities have been completed. Thanks for your help. -- Terry Coles -- Next meeting at *new* venue: Bournemouth, Tuesday, 2018-10-02 20:00 Check if you're replying to the list or the author Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
