Regarding 'Stream real-time data to phyphox' example

[Vinay Uday Prabhu]

Hi!
I uploaded the DataCollectorBLE.ino file successfully and connected the Tracer device to the PhyPhox app downloaded on my Android phone.
However, it defaults to the tennis-demo default example with the sub-plots having titled 'First Graph' ;'Second Graph' etc.

Any help? I was primarily intending to use this device to collect data and was wanting to get the ''Stream real-time data to phyphox' running.

Thanks!

PS: Attached below is the screenshot of my IDE after it uploads the code

[YJ]

Hi Vinay,
I am glad it worked ok (mostly). :)

If changing the name of the plots is what you want to do, you can edit the "bluetooth.cpp".
See line 23, 34 and 45.

[Vinay Uday Prabhu]

Ah, my bad I wasn't clear!
I was hoping to collect 6 axis Acc+Gyro data: [time_stamp, ax,ay,az,gx,gy,gz] and visualize all 6 axes via PhyPhox (The gyro Z-axis data seems to be amiss)

So, if I change line 44 in DataCollectorBLE.ino file to ble.update(ax,ay,az,gx,gy,gz); I get the following error:

/src/examples/DataCollectorBLE/DataCollectorBLE.ino: In function 'void loop()':
DataCollectorBLE:44:31: error: no matching function for call to 'Bluetooth::update(float&, float&, float&, float&, float&, float&)'
   ble.update(ax,ay,az,gx,gy,gz);
In file included from /src/examples/DataCollectorBLE/DataCollectorBLE.ino:3:
Tracer-main/src/bluetooth.h:26:10: note: candidate: 'void Bluetooth::update(float, float, float, float, float)'
     void update(float f0, float f1, float f2, float f3, float f4);

I am guessing that the bluetooth.h and bluetooth.cpp need to be modified.
I've tried this thus far:
a) Modifying bluetooth.h line 26 as void update(float f0, float f1, float f2, float f3, float f4, float f5);
b) Adding a sixthGraph element in bluetooth.cpp
But doesn't seem to work :(
Any pointers?

[YJ]

Ah right, yes I understand you now.
It is a limitation of the Phyphox library. If you just want to collect data, you could get the data to stream over BLE Serial.

https://randomnerdtutorials.com/esp32-bluetooth-classic-arduino-ide/
See this example and let me know what you think?

[YJ]

I could get round to writing an example of this over the weekend if you'd like.

[Vinay Uday Prabhu]

Ah, yes! You are dead right. I just realized that too that it's an innate restriction of the PhyPhox lib.
I tried editing their header / cpp files but the code wouldn't verify :(
I will take a look at the tutorial you shared later today and update here.
Once again, thank you so very much for this wonderful initiative and your help here.
Much appreciated!

[YJ]

All good! Hope you have as much fun tinkering with it as I do. :)

[YJ]

Please see this example.
https://github.com/elektroThing/Tracer/tree/main/src/examples/DataCollectorBLESerial

Hope that helps!

[Vinay Uday Prabhu]

I tried the above shared .ino file and got the following error in the Serial Bluetooth Terminal app on Android.
I looked up the solutions proposed for similar bugs here but couldn't made headway.
Did you encounter this error during testing by any chance?
Thanks!