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HN50

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  1. !!! Thanks for the heads up. Things are looking quite lively still, I will leave it until late tonight or tomorrow and pull out the data. Fingers crossed... Dave
  2. Hi, Glad it looks like the radio is okay. I am in the midst of 'Arduino Can't Find Drivers Part 746'. I think though that I might have got to the bottom of it, I am writing it here as much for my reference as anyone else's! When CHRG light stars flashing and IDE can't find COM port, unplug Arduino MKR 1010 Restart laptop Unplug I2C modules (in this case the RTC), also unplugged the SD card even though not I2C (I found a posting in https://forum.arduino.cc/index.php?topic=567417.0 that gave me an idea) When laptop restarted plug in Arduino CHRG light may flash but should hopefully go out after a couple of seconds, in Device Manager should see Arduino MKR WiFi 1010 under a COM port Try uploading a sketch Plug in I2C RTC and SD card Should now upload code successfully in IDE Universe is in balance again That is a rather long way of saying turn it off and on again. I like Arduino a lot but I find I can burn up hours trying to resolve these issues. And now on to what I actually wanted to do today... !
  3. Sorry to hear that, hope you get it working.
  4. Weekly update... I pulled out the data and passed it through my trusty LibreOffice spreadsheet and generated the following GIF (I won't post each individual day but will do if asked). The data looks okay and the unit is running as I would have hoped, but yes, quite an uneventful week. If we are at a deep solar minimum then I guess we have a few years to get this all perfected! I also recalculated the all time averages as well and has hoped the averages are stabilising with continued normal functioning. @Tomatobro - I looked at 22/05/2020 to compare to what you had recorded. The whole day looks like; I see a drop at about 15:00 (my RTC is running on BST at the moment), so I zoomed in further. I must admit I am not sure I see the same output, there is a dip in signal but I don't see that high/low output you were getting. Do you have a plot for 23/05/2020 (mine is pasted below)? There seems to be several on/off events in the evening so would be good to see if you detected these. In terms of development, I have been looking at getting a MKR 1010 prototype running on a breadboard. I have got it writing to the SD card but one thing I have found is that the DS3232.h library I had been using is not compatible with the MKR 1010, I think there are some reserved keywords in there that clash and error when you compile. I found this posting https://forum.arduino.cc/index.php?topic=626051.0 which refers to a particular v 1.0.3 version of an alternative RTC library to use so I downloaded that. The keywords are different so I have spent today getting to grips with setting the time and using the alarm functions. Pretty poor photo but that is just a sketch that shows the time and various alarm settings. So I think the next step will be to get the various bits (RTC/SD card/low power) all working together on the breadboard prototype. I also need to check the voltage divider as I am not sure there is a setting to put the internal voltage reference to 1.1V in the MKR 1010 so the divider will need to drop the radio 5V to 3.3V instead. I am not too concerned as I can set the ADC to 12 bit. Anyway, things to do in the coming days. Thanks for reading.
  5. Hi, I will try and get the data out the SD card tomorrow, I am hoping to see a similar pattern. Dave
  6. Double clicking the reset button when connecting the MKR1010 to the laptop via USB seems to help the drivers get set correctly. Beats me but there we are.
  7. Hi, I like it, I am trying to visualize it - that is pretty small, isn't it? Do you have a block diagram of how your setup will work? Well, a bit of a mixed bag in terms of progress this week. Firstly, the good, my data capture is going on well. The overall signal strength seems down as compared to earlier weeks, however the results seem to be stable. There do not seems to be have many maintenance shutoffs either. Weekly animation is below. Another week and has passed and my rig seems stable, the logger and radio are working, and I am getting a steady profile. I am interested as to why the overall signal is weaker as compared to the late in April, so I wonder if the transmitter is operating at reduced power? I also checked the GOES X-ray flux data for the last 7 days but nothing bigger than A class has happened. I have also produced an average plot by hour of all data logged so far which is starting to show that certainly the mean is gradually settling down to resemble a quiet day as extreme data becomes less significant. And now the bad. 1) I still can't push code out to the barebones Arduinos I have built, I keep getting an 'avrdude not in sync error'. This seems to be a little cryptic to work out what is going on. I have; > Bought a new usb to serial chip in case this was the cause - it isn't as I still get the same problem > Run the logger under external power to see if it is working or the Atmega328p chip is fried. It works and happily logs, so that isn't the cause. > Reburnt bootloader to chip to see if that had corrupted. I could do this successfully however I still can't upload my code to the chip. So still a problem that I can't push out updates..! 2) After spending a lot of yesterday and today on the above, I have been experimenting with getting the MKR1010 working if I can't now upload code to the Atmega328p models. I have it writing to an SD card and have been trying to get it working with an RTC. There is one built into the MKR1010 however it needs to be set via a WiFi connection and has no battery backup. In initial experiments I have found that if you have a sketch that sets the clock via the internet and then upload the logger sketch the RTC starts up at the last time the previous sketch ran and does not increment between. There may be settings that deal with this, I am still investigating how it works but I do not want it to be constantly connected to the internet in case I need this to be battery powered. I am also seeing if I can use the DS3231 RTC as I like it being battery backed up and has several alarms built in to it. So while I have not got round to building anything I am at least investigating what the MKR 1010 can do. That all sounds good, the bad part in the above is in the last hour my laptop has started refusing to detect the MKR1010 at all. I think the drivers became corrupted so now I can't upload to code to the new Arduino either. Three steps forward and three back this week, those emoticons are rather apt. Thanks for reading.
  8. Hi, That is interesting, if you get rid of the laptop what is the unit a custom built computer/microcontroller? I ask that as I see you mention EEPROM which is available on the Arduino. You only get 100k (I think) writes Arduino though which would get used pretty quick with the loop that is triggered every minute. How many writes to do get before it corrupts? Well, here is the Sunday post. As I ever I resisted the temptation to hoick out the card before today. I copied over the data into LibreOffice Calc and analyzed it. The good; >>> Orienting the antenna did not seem to make too much difference. I realised that I was already nearly pointing in the right direction. >>> I don't think the significantly higher temperatures this week affected the radio The bad (well, not sure, I don't think I have any control over it but it becomes clear from the plots). There is a time jump in the first screenshot as I had it switched off for a few hours doing work on it. 'Something' happened on the 04/05/2020. Prior to that the signal strength of the transmitter was of a range I had seen before, however after the maintenance window on Star Wars Day (May 4th, boom boom) the signal strength of the transmitter has been significantly down all week up to and including today. I have not made changes to the radio's tuning and the fact that this behaviour takes place after the switch on on the 4th makes me wonder if the transmitter is running at a much lower power..? I suppose I will get an idea when I pull out the data next Sunday. So I won't worry too much at this stage as my setup still seems to be working. GIF for the week. I have also started looking at the Arduino MKR1010, I have played around with some of the sketches and have got it logging details of WiFi connections available around my house. I think there will be a bit of a learning curve with it as I have not quite been able to get some of the WiFi enabled projects working, though they do focus on it being used as a server and as a data logger I think it would be a client. In addition there will be some rewriting as it has its own RTC built in and I am not sure if the DS3231 is compatible (the library for this is filed under 'Incompatible' in the Arduino IDE when you select MKR1010). Plus it runs on 3.3V not 5V so the chassis I plug it in to will need to be quite different to the YABBA ones I have built, but I had expected that. The biggest problem I have is that after installing the MKR1010 software I don't seem to be able to program my YABBA boards any more, I get a program error when I upload to the board(!!!). I was going to reset the RTC to be on GMT (I realise mine is set to BST) today but at the moment I can't. Let's hope my setup is reliable as I can't currently make changes..! Anyway, let's see how things go. If I can't program my existing boards then I have to migrate fully to MKR1010 and done with. I guess I had better get investigating it... Thanks for reading.
  9. Hi, Thanks for posting your output, that does look rather similar. When I first saw the 02/05/2020 plot it did make me wonder if there was a problem with my setup but it appears that it is a real result. Dave
  10. Hi, I could quite happily own a Fluke multimeter..! I posted my data for the last week so would be interested to see how it compares, not least as there were some strange readings yesterday morning around the maintenance window. Dave
  11. I was going to do some work on this yesterday however I found as the weather was unexpectedly better than I had thought it would be I spent it in the garden in the veg beds. By that I mean I was working on them, not lying in them. Today I worked out the bearing from my house to Rhauderfehn in Germany and it comes out at ~64 degrees, so once I start logging later I will re-orient the antenna. At present the antenna is not in this orientation, however it does put (I think) a lot of noise from the house into the null zone. So I am interested to see what the trade off will be - next Sunday I will pull out the data and have a look. Earlier I cut the power and hopped into the roof to pull out the SD card. Among other things I wanted to check was that the change to the voltage divider had not caused any problems, I don't know why that would be an issue but as I had made a hardware change I did want to confirm all is okay. The general trend looks okay, I can see the diurnal pattern, the daily maintenance period is there, the readings taken have have not berserk and the Arduino has been logging the temperature recorded by the RTC as well. By day it looks like the following; And in GIF: My setup is still returning the diurnal profile. Some funny stuff happened 02/05/2020 between 0800 and 1000 but I wonder if that was due to work at the antenna(?). Otherwise though the numbers logged look as expected, and I am gaining confidence that my setup is stable. I had a look at the GOES data - there was an event on 01/05/2020 at about 14:30 however I still think that this lower/mid B class is below what the radio can detect. For the first time I have temperature from the RTC being logged as well (red line). I am interested in this as the tuning guide says that temperature increases can push the radio into oscillation (page 16, #12) and my radio is up in the roof where things can get quite warm in the summer (touching 40 Celsius!). I don't think though at this stage I have enough data to give any meaningful results so I am going to use it for reference over the coming summer. Anyway, in all I am pleased with what has been logged this week and am thinking about what I will do next. I would still like to have the option to run from battery with power being supplied by the Arduino and the radio being turned on when needed. I looked around and found the ready-built MOSFET switch unit using an IRF520 transistor. Even more useful I found a website that as well as advertising the module for sale also gives a schematic of it; https://protosupplies.com/product/irf520-n-ch-mosfet-module/ Turns out I have all the bits. Handy! I am increasingly aware that needing to go up the ladder to get an SD card interrupts logging and, while fine for testing, isn't really conducive to real time SID monitoring. Earlier this week a page arrived with an Arduino MKR wifi 1010 arrived. I think I will try and work on the switching and initial MKR 1010 investigations in parallel. Thanks for reading - data is attached. Dave VLF_T2_20200503.TXT
  12. Hi, Thanks for the post. One thing I quite like about this work is that it generates data for analysis . Out of interest what are you using to measure your loop antenna response? Am I right thinking you have an A/C multimeter capable of going down to milivolts? Having tuned the antenna to 23.4kHz are you finding that the other transmitters are now attenuated or have you got SpectrumLab just logging DHO38? Dave
  13. Today’s work; I have built a 1:1 copy of the chassis so I can undertake further development and still leave my production set up logging in the roof. They look and work exactly the same, which is good! On checking through my components box I found I don’t have any 10nF capacitors (might have to check again as I don’t quite believe that) however I did find some discussion about the voltage divider and if your total resistance is 10k ohms or less you don’t need a decoupling capacitor. So I recalculated and used a 5.6k and two 2.2k ohms in series to drop to 1.1V. I also updated the code to log the temperature measured by the RTC. I converted it to Kelvin as, ummm, I could . It is all running again in the roof so I will leave it to see what comes back later in the week. Thanks for reading.
  14. Hi, That MakerPlot looks interesting as you could hook up several Arduinos to feed in to it. I would like to go down the cloud route myself as I love the idea of building a sensor (battery or mains powered) that just fires its data off to an internet connection and all the processing and analysis happens online. The Arduino store page for the MKR 1010 has links to several articles that discuss this plus it has some encryption built into the board from the outset. How do you find SpectrumLab? People seem to get good results but I found it a bit frustrating and looked at other means of detecting SIDs, which brought me to this method. Dave
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