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by prodata
Thu Oct 17, 2019 3:01 pm
Forum: Automation, sensing and robotics
Topic: Meteo-Pi now available
Replies: 0
Views: 76

Meteo-Pi now available

Appreciate that this is more of a hobbyist/DIY forum than for commercial products but, for anyone that might be interested, we're now offering the Meteo-Pi product. Meteo-Pi is a new adapter + µHAT for connecting the console from a Davis weather station direct to a Pi. (For those unfamiliar with the...
by prodata
Mon Oct 07, 2019 2:21 pm
Forum: Off topic discussion
Topic: Voltage conventions
Replies: 6
Views: 705

Re: Voltage conventions

OK, thanks for the reply. That was my working assumption but it's good to have agreement from someone else. Strangely, the data sheet doesn't seem to say AFAICS, which is why I was starting to think it must be such an obvious convention that they didn't need to restate it explicitly!
by prodata
Mon Oct 07, 2019 12:25 pm
Forum: Off topic discussion
Topic: Voltage conventions
Replies: 6
Views: 705

Voltage conventions

Sorry, nothing directly to do with a Pi but a simple question and hopefully someone here might know: I'm trying to set up a 6v ==> 12v DCDC converter (Pololu U3V50F12) for a project - the 6v is sourced from a solar PSU that contains a 6v Lead-acid battery. The input and output connections are GND an...
by prodata
Sun Aug 11, 2019 8:03 am
Forum: Automation, sensing and robotics
Topic: Anyone interested in testing a new µHAT for Davis stations
Replies: 8
Views: 1198

Re: Anyone interested in testing a new µHAT for Davis stations

If the uHat can work with my old Weather Monitor II, I'd love to try this out! How do I get more info? No, sorry. The adapter pinout is quite different on the old WMII-type models. Remember that they were effectively superseded by the Vantage models almost 15 years ago now and haven't been availabl...
by prodata
Sat Aug 10, 2019 4:23 pm
Forum: Automation, sensing and robotics
Topic: Anyone interested in testing a new µHAT for Davis stations
Replies: 8
Views: 1198

Re: Anyone interested in testing a new µHAT for Davis stations

How much data can it store ?, and assuming I set the Davis to take readings every 10 minutes how long can it log for without being read from ? I'd need to double-check, but AFAIK storage is the same as a regular logger, ie 2560 records or somewhere around 17 days @ 10min interval. But if you have a...
by prodata
Sat Aug 10, 2019 3:55 pm
Forum: Automation, sensing and robotics
Topic: Anyone interested in testing a new µHAT for Davis stations
Replies: 8
Views: 1198

Re: Anyone interested in testing a new µHAT for Davis stations

OK, further clarification: Meteo-Pi is just hardware providing a UART input into the Pi with all the standard logger features, ie LOOP & LOOP2 real-time data, archive data, logging (if the Pi was offline for any reason) etc. So as long as any software can accept the standard Davis data feeds from a ...
by prodata
Sat Aug 10, 2019 3:23 pm
Forum: Automation, sensing and robotics
Topic: Anyone interested in testing a new µHAT for Davis stations
Replies: 8
Views: 1198

Re: Anyone interested in testing a new µHAT for Davis stations

Well TBH this probably isn't for users who already have a logger (and who aren't having any USB issues). It's more for new users or those without a logger who might be interested in a lower-cost alternative to a standard logger. But there's a draft web page with some further info at: https://www.wea...
by prodata
Sat Aug 10, 2019 10:50 am
Forum: Automation, sensing and robotics
Topic: Anyone interested in testing a new µHAT for Davis stations
Replies: 8
Views: 1198

Anyone interested in testing a new µHAT for Davis stations

A long shot I know because this is probably not the right audience, but let me just ask anyway: We have a new µHAT in late development for connecting a the console from a Davis weather station direct to a Pi. (For those unfamiliar with these products, Davis is the market leading brand worldwide for ...
by prodata
Mon Jun 24, 2019 11:33 am
Forum: General discussion
Topic: Raspberry Pi 4 Thread - general discussion
Replies: 895
Views: 98700

Re: Raspberry Pi 4 Thread - general discussion

My main comment is less about the new hardware than to hope that the advent of USB3 might encourage case or HAT designers to offer something that would allow eg an M.2 SSD to be integrated within footprint of the Pi (I guess a 180°USB adapter would be unavoidable). It's immediately more clumsy to ha...
by prodata
Thu Jun 13, 2019 3:05 pm
Forum: Beginners
Topic: Troubleshooting 'wlan0 not associated'
Replies: 4
Views: 217

Re: Troubleshooting 'wlan0 not associated'

Thanks for all the suggestions - I'm investigating... But starting with a fresh Stretch download - one or two oddities in the Pi's behaviour - no obvious sign of corruption in the previous download but perhaps best to try again.

Hopefully VSC behaves as a text editor?
by prodata
Thu Jun 13, 2019 12:42 pm
Forum: Beginners
Topic: Troubleshooting 'wlan0 not associated'
Replies: 4
Views: 217

Troubleshooting 'wlan0 not associated'

Appreciate this is a (very) well trodden path but struggling with a failure to connect to WiFi with a Pi0W and also 3B+ & without cabled Ethernet being available and would appreciate any up-to-date hints fpr troubleshooting. I have one Pi0W happily talking to the WiFi network. Then made another coup...
by prodata
Tue Jun 11, 2019 4:58 pm
Forum: General discussion
Topic: Move a headless Pi0W to a new WiFi network - how?
Replies: 4
Views: 348

Re: Move a headless Pi0W to a new WiFi network - how?

Thanks for the suggestions. It does appear that Raspbian looks for a wpa_supplicant.conf file in the boot/root each time it boots. And if it finds one then simply overwrites the existing wpa_supplicant.conf file. So it's actually a simple matter to update the network parameters on a headless Pi0W. I...
by prodata
Tue Jun 11, 2019 2:38 pm
Forum: General discussion
Topic: Move a headless Pi0W to a new WiFi network - how?
Replies: 4
Views: 348

Move a headless Pi0W to a new WiFi network - how?

I've got stuck trying to move a headless Pi0W between WiFi networks (home and office). I originally placed (under Windows) the wpa_supplicant.conf file in the SD card boot/root and all was fine post-first-boot. Then wanted to move the Pi to my office network, so edited the /etc/wpa_supplicant/wpa_su...
by prodata
Thu May 23, 2019 11:43 am
Forum: General discussion
Topic: PiBow case screws
Replies: 13
Views: 722

Re: PiBow case screws

I'm sure this is a well-trodden path and described many times before but here's the solution I arrived at with the PiBow case to cope with an overheight HAT. pi_case_230519c.jpg The idea is very simply to add a threaded standoff between the top layer and the one below. It's maybe not quite as elegan...
by prodata
Fri May 17, 2019 6:57 pm
Forum: General discussion
Topic: PiBow case screws
Replies: 13
Views: 722

Re: PiBow case screws

Hmm, interestingly (and rather frustratingly) M3 steel machine screws won't fit! At a guess their diameter is only eg 0.1mm too much - they will screw through with a little effort but not simply push through, which isn't good enough to use. Actually the holes in the top cover ARE wide enough but not...
by prodata
Fri May 17, 2019 11:45 am
Forum: General discussion
Topic: PiBow case screws
Replies: 13
Views: 722

Re: PiBow case screws

Thanks everyone for the super-prompt responses. Sounds like M3 should fit the bill fine. I'm guessing that bright steel machine screws are going to be more readily available in a range of lengths than nylon at my local hardware store - can't see any obvious reason not to use those and possibly just ...
by prodata
Fri May 17, 2019 11:07 am
Forum: General discussion
Topic: PiBow case screws
Replies: 13
Views: 722

PiBow case screws

Anyone happen to know the size of the PiBow case screws please? I'm guessing they're all the same diameter but this is for a 3B+ Rainbow case if it makes any difference. Thought they were M4 to start with but that looks a bit big now so maybe M3 (unless they're an odd size like M2.5), They're a bit ...
by prodata
Sun Apr 07, 2019 9:54 am
Forum: General discussion
Topic: anemometer - how to 'average' readings
Replies: 17
Views: 1027

Re: anemometer - how to 'average' readings

It all seems a bit moot as the input times don't actually reflect the rotation time of the anemometer. Not 100% sure what you mean. In most simple/inexpensive/non-ultrasonic anemometers the number of rotations of the cups is counted, not the time of rotation. The Davis ones for example are designed...
by prodata
Sun Apr 07, 2019 8:58 am
Forum: General discussion
Topic: anemometer - how to 'average' readings
Replies: 17
Views: 1027

Re: anemometer - how to 'average' readings

This does seem to be deviating a little from standard meteorological practice, though of course the OP is perfectly entitled to treat their data as they see fit. But general practice (see eg https://library.wmo.int/doc_num.php?explnum_id=3177 ) recognises two types of wind speed values: * Mean speed...
by prodata
Sat Aug 11, 2018 4:06 pm
Forum: Automation, sensing and robotics
Topic: Pi-controlled relays
Replies: 5
Views: 683

Re: Pi-controlled relays

Thanks for the replies - both helpful. In my application, a relay state (ie on or off) is likely always to be held for at least 5 minutes of the time without changing, potentially for several hours at a time. So the issue is not one of frequent changes of state, more of the on state potentially bein...
by prodata
Sat Aug 11, 2018 11:05 am
Forum: Automation, sensing and robotics
Topic: Pi-controlled relays
Replies: 5
Views: 683

Pi-controlled relays

Can I ask a very simplistic question about relays controlled from a Pi using eg the ModMyPi PiOT Relay Board: If you have an application where the relay is triggered (ie held on) for up to 50% of the time then is there any risk of the relay overheating or suffering any other adverse effects? I appre...
by prodata
Sat Mar 17, 2018 9:25 pm
Forum: General programming discussion
Topic: Running programs in harness
Replies: 2
Views: 884

Running programs in harness

Pretty sure this will work OK because it must be a very commonplace scenario, but just realising that I don't properly understand what's happening in the background: I want to run two programs in harness (all on the same Pi). So one program will read multiplexed sensor data from a USB port frequentl...
by prodata
Sat Feb 17, 2018 3:29 pm
Forum: Beginners
Topic: Rclone Easy Install and Setup on a Raspberry Pi
Replies: 2
Views: 13144

Re: Rclone Easy Install and Setup on a Raspberry Pi

Been trying this with rclone and Google Drive on a standard Pi 3 with Stretch, but something's amiss: The installation appeared to run through OK and AFAICS the Google token was requested, received and embedded into the rclone config. However: I was expecting to see an rpi-sync folder to appear in m...
by prodata
Fri Feb 16, 2018 12:12 pm
Forum: General discussion
Topic: USBed weather station list
Replies: 6
Views: 1082

Re: USBed weather station list

WM-918 is a pretty standard station. I doubt that Ed ever bothered to migrate VWS across to Linux, but I suspect that all the other packages I listed are compatible.
by prodata
Thu Feb 15, 2018 9:56 pm
Forum: General discussion
Topic: USBed weather station list
Replies: 6
Views: 1082

Re: USBed weather station list

Not quite sure what question you're asking, but: If you're going to roll your own code from scratch then pretty much any station with a USB interface will probably play, provided you have access to the API. OTOH if you want to start with one of the many weather station software packages that are com...

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