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Build Your Own Data Logger Community / Feed

Welcome to the official group forum for our virtual course, Build Your Own Data Logger. This is your space to engage with course instructors Akiba and Jacinta from Freaklabs, find help and resources for each module, collaborate and chat with your fellow course participants, and share your progress on your own Data Logger project!

discussion

Code location online?

Total beginner and failing eyesight mean trying to read code on the YouTube videos is a struggle. I think I am right in saying there are copies of the code on Github (SP??) and I...

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Hi. I guess we haven't made it prominent enough. Here is the github link where you can find all the code for the virtual course:
Link

Hope that helps :)

Akiba

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discussion

Module 3.1: Programming Basic Functionality

Hi WildLoggers, We're just about ready to share our next module with all of you! We have a little announcement regarding this module: Because there are so many videos in...

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When you get a chance, can you please upload PDF's of the slides for the 3.2 videos? Thanks! 

@vickiedenicola 

In your code to set the baud rate you write: cmd.begin(57600);

Have you tried this with: Serial.begin(57600);

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discussion

Microphone and ePTFE

In the Welcome Session Akiba mentioned using ePTFE for waterproofing mics. Is this membrane suitable for application with mics that are used for detecting ultrasound signals, e.g...

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Would ultrasonic trransducers also work as ultrasound microphones? If so, there are waterproof ultrasonic transducers that exist. It's possible to encase these either in silicone rubber, epoxy, or stuff into a cable gland to have a waterproof ultrasonic microphone.  I've attached a pic of one for reference.

Akiba

Hi Cryssy,

    I am also looking for membranes to waterproof mics used for recording bat ultrasound. The people at Open Acoustics Devices is using  Porelle® AV5ID acoustic membranes for the AudioMoth moulded case (https://github.com/OpenAcousticDevices/Application-Notes/blob/master/An_Injection_Moulded_Case_for_AudioMoth.pdf). I wonder if someone in the WildLabs Community may know how to get them in small quantities. I have only found dealers that sell them in large quantities (+2000), I guess for the cell phone market (for example, https://selectronix.co.uk/collections/waterproof-acoustic-vents/products/black-acoustic-vent-11x5mm-ip68-3m-30min).

    Let me know if you find something,

    Best wishes,  Toni 

Hi Toni. 

We have some ePTFE samples that we're testing for the webshop. If you're interested in characterizing ePTFE samples for high frequency audio, we can send some out to you.

Akiba

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discussion

North/Central/South America (western hemisphere) viewing party?

Hi all!  Wondering if anyone else in the Western hemisphere time zones would want to set up a joint watch session for the course modules, office hours, etc.? I know some...

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Hi. Just an FYI. I asked Carly if we were meeting weekly and she said it was going to be bi-weekly. So as far as I know, there's no watch party tomorrow. Is this correct? If so, then I think the registration needs to be updated since it filled my calendar with weekly events instead of bi-weekly events.

Thanks.

Akiba

Hi Akiba,

Yeah that's right, it's bi-weekly, so next Tuesday will be the next event! I'll see if Carly can change the registration details so it'll show the new schedule.

Hi all!

So the next Western Hemisphere office hours will be NEXT Tuesday (Dec 15) at 5pm EST/2pm PST. Since the module videos and info are released today and every other week from today, we wanted to give folks a chance to work through stuff on their own a bit and then come prepared with questions/problems for the office hours. For those who've already registered through the Zoom link, I just re-sent the confirmation email with the updated dates. To anyone who wants to join in, register here

-Carly

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discussion

BYO Data Logger: Introduce Yourself!

Welcome to the Build Your Own Data Logger virtual course! We're so excited to see such a great group of regular Wildlabbers and newcomers joining us for our first virtual...

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Hi Greg. 

Wow, I'm glad the boards got to you. Jacinta and I are still working on the modules and I'm discovering creating video takes much longer than I had anticipated. Jacinta's more pro. For the course, we're targeting people that are completely new to Arduino and are deliberately pacing it so that it doesn't overwhelm everyone. But if you  have more experience and want to move forward on your own, here's some info and things you can do. 

We're running behind on documentation because all our time is taken creating video, assembling kits, and shipping out orders. But I've attached an image that should help out in understanding the pin mappings. 

I also recommend you test out the realtime clock and SdFat library on your board. You can download them from the Arduino library manager. Search for Rtc_PCF8563 and also the SdFat library in there. Also, the SdFat uses pin10 for the chip select. 

If you run into problems, we'll be dropping the videos for the command line, temperature/humidity sensor, and analog digital converter next Tuesday. Two weeks after, we'll be dropping the videos for realtime clock, SD card, and interrupts. 

You might also be interested in the video where we do the toplevel integration for the app and also the power and reliability optimizations. Those come in January. 

Good luck and if you get stuck, feel free to ask questions and the course videos will be rolling out soon :)

Akiba

p.s.  Once we have everyone on the same page with the fundamentals, then we have some ideas on really interesting follow-on courses/projects that build on that :)

Akiba,

It's great to have an Arduino that integrates most of the things that we need on the board. Previous projects have required a spaghetti of all-too-fragile interconnects. The design seems quite well thought out.

I'll do as you suggest with the realtime clock and SdFat libraries. Sharing the sketches on your GiHub repository https://github.com/freaklabs/byo-datalogger/tree/main/WildLogger would be very helpful.

Kind regards

Greg

Hi Greg.

I'm glad you like the WildLogger. It's actually a variant of a design we use all the time. Jacinta and I come from a background in environmental monitoring and international development. The types of designs and the problems are very similar to wildlife conservation and research. We'd be floundering if we had to design consumer electronic devices. Ha ha ha. 

We'll be uploading code to github for the modules as we release the videos. If you want to work ahead and you have questions though, feel free to post here or in this forum. 

Akiba

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discussion

Module 1: Understand the Design Stack

Hi WILDLoggers,  Thanks to everyone who attended our virtual launch today! We're so excited that our virtual course is finally here! You can find...

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FYI ordered the 11th, send the 13th, arrived in good order today, the 27th, in the UK .

Hi Egil. 
Thanks for the info. It looks like UK deliveries are pretty consistent at around 15 days on average +/- a few days. 
We are seeing much more variability for the US which is fast for some and slow for others. If anyone has any questions or wondering about their order, feel free to email us or PM us on Wildlabs. 

Akiba

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discussion

Memory & Power - Alternatives

Hi Everyone, I have a few questions relating to Memory & Power (Video 1.2b). I wondered if there was any reason for using AA batteries as opposed to a LiPo? I’d...

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Hi Rob. 

Congratulations on getting it to work!!

Yes, most batteries come with the JST-PH connector which has a 2mm pin spacing. If you have the equipment and components to crimp on a JST-XH connector which has a 2.54 mm spacing, that would fit into the Wildlogger board. As a warning, the virtual courses and the Freaklabs designs will standardize on the JST-XH connectors with 2.54 spacing because they're compatible with standard electronics prototyping gear like breadboards, and standard 2.54mm (0.100") header connectors. However the JST-XH connectors have polarity (they can only be plugged in one way) and lock (they require additional force to remove) which is why we are using them. 

Anyways so if you can crimp on JST-XH connectors, I recommend doing it for your Li-Po (Lithium-Ion-Polymer) battery. For single cell Li-Po batteries, they are compatible with WildLogger and can replace the stock battery case. We used the standard case because we were worried about what kind of batteries were commonly available throughout the world. Alkaline AA batteries are easily found everywhere so we decided to go with those for this first course. That may change in the future or that we offer different battery options for future courses and designs. 

Hope that helps.

Also for those that are wondering what JST-XH and JST-PH are, JST is a company that makes a type of connector that is commonly used for cable harnesses. In general, they are commonly used fo batteries, but also for other types of cables. JST-XH is a specific polarized locking cable connector with a 2.54 mm (0.100") pin pitch. JST-PH is a specific polarized locking cable connector with a 2.00mm pin pitch. In general, I prefer polarized, locking connectors because it's not possible to plug them in backwards and because they lock, it's hard to inadvertently pull them out or for them to fall out due to vibration. The standard connectors you might recognize are Molex 2.54 mm connectors which don't have polarity and locking so it's possible to plug in cables backwards and have them fall out. They're okay for general usage, but when possible we use JST-XH. I've attached a pic of Molex 2.54mm connectors and JST-XH 2.54mm connectors below for reference.

Also we will be covering crimping our own cable harnesses later. It's an important skill and cable harnesses are one of those unglamorous things that are critical for devices and deployment but aren't really talked about much.

Akiba

Rob

Hi Akiba,

Thanks for that.  I've not added hardware to the Arduino IDE before, so that was useful to learn.  I've just got an original Commodore 64, to have a nostalgic retro Christmas, to re-learn BASIC and hopefully learn some machine code & the principles of computer architecture.  Hopefully when I turn it on, the smoke will stay on the inside! : )

Yes, it was the male connector on the battery I was thinking of changing (not the female connector on the board).  I'm not going to, it was just to check it was OK to do so; if the need ever arose; for future reference.  Interesting, I was thinking about the issue of the connectors locking/ pulling out, and their accessibility in the case.

I'd be interested to learn more, as you say in the future about different battery options.

Cheers!

 

 

Hi Rob. 
The battery connector would be the easiest connector to change from PH to XH. Also the Wildlogger board can tolerate any battery input between 3.6V and 5V. We purposely chose this range so there is compatibility with single cell lithium-ion and lithium-ion-polymer batteries as well which are 4.2V nominally. 
Yes, batteries are fascinating and one of the biggest issues we deal with for these types of applications. They're often the limiting factor for drones, tracking collars, and long term monitoring devices. They also don't scale with technology so no matter how tech improves, we still essentially deal with decades old battery technology. Ha ha ha. 
Hopefully that seems like it might be changing :)

akiba

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discussion

Office Hours: Module 1

Hi Wildloggers!  How's everyone getting on with Module 1? Although we're releasing this virtual course so that it can be done at your own pace, we've heard a...

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Hi everyone. 

For this week's office hours, we'll be giving a preview of Module 2 which will be released after office hours and answering questions about Module 1. We'll also be answering any other questions you might have regarding hardware, sensors, datalogging, etc. Looking forward to chatting on Tuesday.

Also we'll be discussing with @carlybatist to arrange that Jacinta and I will be available for the western hemisphere (Americas and Africa) meetup as well. We didn't expect so much geographically diverse interest in the course. Ha ha ha.

Akiba

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article

Module 1: Understand the Design Stack

Welcome to the first module of our Build Your Own Data Logger virtual course. We'll cover what you need to know about the hardware and software we'll use in this course, and things you should consider when choosing...

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