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EEVBlog 121GW Discussion thread

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Muttley Snickers:

--- Quote from: JDW on February 19, 2023, 09:19:59 am ---(snip....)
The reason I even ask is because I dislike the Meteor app because it lacks a FREEZE/HOLD feature.  When logging data with the app via Bluetooth, I want to be able to tap the iPhone screen or a button in the app to freeze the waveform display so I can better examine it.  If I stop logging, the frustrating Meteor app dims out the waveform display, making it harder to see! 

--- End quote ---

I don't own this meter or any Apple products but wondered if as an interim measure you were able to grab a screenshot on your phone whilst logging to further assess the measured data?

JDW:
I have the following 2 questions today which are NOT app-related...

(1) Why does the backlight flash on & off for a split second each and every time I switch on my 121GW?  I see no practical reason for that. It's not like you need to TEST the backlight LEDs each time the meter is switched on.  And while it comes on too briefly to have a negative impact on the alkaline batteries, the fact remains it does draw more current in that brief split second versus the backlight not flashing on/off at all.  Can it be said that is something which should be fixed in firmware?

(2) After switching the meter on, I want to know why it takes 3 seconds before I can use it.  Sure, I see it displays the firmware version for 3 seconds.  But does the meter deliberately wait 3 seconds solely for the purpose of displaying the firmware revision?  Or would the meter take that long to become usable even if the firmware version was not displayed?  The reason I ask is because if the meter could become usable faster than 3 seconds after switch-on, that would be beneficial, and perhaps the firmware version could be looked up somewhere in Setup instead of displaying every time the meter is switched on.

bicycleguy:

--- Quote from: EEVblog on February 22, 2023, 01:53:52 am ---After spending half the day and live stream trying to do it, thesource code is now on github:
https://github.com/EEVblog/121GW-App-Apple-IOS
also gitlab:
https://gitlab.com/eevblog/eevblog-121gw-app-for-apple-ios

--- End quote ---

Thanks again for posting these.  After spending a full day to figure out, both seem to be for the asci encoded version of the 121GW ble protocol (from 2016 b4 the kickstarter?) so won't work.  The IOS version(don't know about android) is called 'Smart Data Logger' and appears to be the long lost version mentioned here:
https://www.eevblog.com/forum/testgear/eevblog-121gw-multimeter-issues/msg2314242/#msg2314242

This is a screendump of 'EEVBlog Smart Data Logger', build 1.0.5 with startup screen data.

Any thing newer?

I don't know what @JDW was talking about unless a newer version of this existed at one time.

This is a screendump of a working version of 121GW, build 1.7, loaded from app store around 2019 I have which doesn't do data logging.


I'll probably try to merge newer parsing code from somewhere around here but a newer version would save a lot of effort.

JDW:

--- Quote from: bicycleguy on February 26, 2023, 09:14:32 pm ---I don't know what @JDW was talking about unless a newer version of this existed at one time. (Attachment Link)

https://www.eevblog.com/forum/testgear/eevblog-121gw-multimeter-issues/msg2314242/#msg2314242

(Attachment Link)

--- End quote ---

What I was (and still am) talking about, with regards to the app, is explained clearly in my opening post on the matter here:
https://www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg4711112/#msg4711112

Since the 121GW has BlueTooth, it made sense for me, having purchased the 121GW new for the first time last month, to Google for "121GW app."  It was then I discovered information about the official app (which sadly no longer exists in the Apple iOS app store) and the Meteor app, which was not authored by Dave/EEVBlog.  Being curious about the iOS app (since I use iPhones only, not Android), I posted in this thread.

Based on that URL you provided, it seems that EEVBlog forum member @DavidWC is the author of the Meteor app.  Well, I did email Western Computational about the Github release.  No reply back or comment here though.

It would be nice if the iOS version could be made to work again.  I would like to try it out, especially since there doesn't seem to be a video out there showing its features.

If the Meteor app had a FREEZE button to stop the waveform without dimming the screen, the official app wouldn't matter so much to me.  I am merely saying that Meteor could use some work to make it better.  And I was also hoping to get the official app on my iPhone to see what features it offers.  But if the iOS app was only compatible with the 2016 edition of the 121GW and not the current version, then it would need a lot more work to get it back into the Apple App Store, I guess.

Why does any of this matter?  Because (1) the 121GW has BlueTooth for some good reason, right?  And (2) it's a bother to remove the blue bumper and unscrew the back case each and every time you want to access data logged to the SD card.  I'm very glad that SD card exists, but disassembly is required to use it.  No disassembly is required to use BlueTooth and a smartphone app, however!  Hence my posts on that topic.

By the way, if anyone has answers to the 2 questions I put forth in my previous post, which have nothing to do with the app or data logging, that would be great!

EEVblog:

--- Quote from: bicycleguy on February 26, 2023, 09:14:32 pm ---Thanks again for posting these.  After spending a full day to figure out, both seem to be for the asci encoded version of the 121GW ble protocol (from 2016 b4 the kickstarter?) so won't work.  The IOS version(don't know about android) is called 'Smart Data Logger' and appears to be the long lost version mentioned here:
https://www.eevblog.com/forum/testgear/eevblog-121gw-multimeter-issues/msg2314242/#msg2314242

This is a screendump of 'EEVBlog Smart Data Logger', build 1.0.5 with startup screen data.
(Attachment Link)
Any thing newer?

I don't know what @JDW was talking about unless a newer version of this existed at one time.

This is a screendump of a working version of 121GW, build 1.7, loaded from app store around 2019 I have which doesn't do data logging.
(Attachment Link)

--- End quote ---

The "Smart Data Logger" app was developed by KaneTest who make the meter. I had no input into that at all.
The "official" 121GW app was developed entirely in-house by my employee at the time David Ledger. I has not been maintained since he left. I do not have the software skills to update this myself, and at this stage I have no intention of finding someone else to update the apps.
The source code for the Android app and the iOS app and the protocol are entirely open source.

Again, I have no idea why the iOS app vanished from the store, we went through all the official red tape to get it approved and listed at the time.

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