Share My Creation BLE Projects - Power up Demos

f0raster0 · Aug 28, 2021

Hi all, just a couple projects using BLE

BLE 700mts+, 24/7 for monitoring in fish farms, and now (in the video) adding(testing) control.. (the video is showing the first prototype)

amplifiers, it connects automatic to those amplifiers

simple test BLE+nRF

Demo: Hello LAIRD BL653 using this module BL653

Demo: test BLE Example with ESP32-C3

Demo: test BLE + ePaper

Demo: Test, nice chart + BLE + pulse sensor

Demo: Test, IC nRF52 + B4J: Bleak - Bluetooth BLE
I tested it with Nordic's nRF52 and nRF51 chips, and looking good...

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Links to BLE demo used:

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www.b4x.com

JohnC · Aug 28, 2021

Speaking of BLE...

I purchased one of these $50 chinese smart watches that connect to an android "companion" app so that notifications and incoming call messages can be sent from my phone to the watch's display.

Is there any tool that you know of that I can snoop on the BLE protocol between the android companion app the the watch?

This way I could hopefully write a B4A app to replace the companion app and get the watch to do new things.

moster67 · Aug 28, 2021

JohnC said:
Speaking of BLE...

I purchased one of these $50 chinese smart watches that connect to an android "companion" app so that notifications and incoming call messages can be sent from my phone to the watch's display.

Is there any tool that you know of that I can snoop on the BLE protocol between the android companion app the the watch?

This way I could hopefully write a B4A app to replace the companion app and get the watch to do new things.

Not really answering your question but I once wrapped for a client an SDK for one of these cheap watches which he had obtained from the manufacturer.
Normally there is one manufacturer which provides the watch to end-sellers with different brands but the SDK and the firmware on the watch are often the same.
So try to get hold of the manufacturer and ask if they have an SDK.

JohnC · Aug 28, 2021

moster67 said:
So try to get hold of the manufacturer and ask if they have an SDK.

Good idea...I'll give it a shot!

hatzisn · Aug 29, 2021

JohnC said:
Speaking of BLE...

I purchased one of these $50 chinese smart watches that connect to an android "companion" app so that notifications and incoming call messages can be sent from my phone to the watch's display.

Is there any tool that you know of that I can snoop on the BLE protocol between the android companion app the the watch?

This way I could hopefully write a B4A app to replace the companion app and get the watch to do new things.

I can think of two ways:

1) The easiest is to download the apk of the Android app and decompile it
2) Man-in-the-middle. Build two arduino projects which utilize BLE and RF, set the first BLE to the name of the watch and connect it to the phone, connect the second BLE to the watch and by separating the two projects enough so that the watch's BLE cannot connect to the phone but the RFs can communicate, log and transfer the communications this way:
BLE watch <-> BLE Ard1 <-> RF Ard1 <-> RF Ard2 <-> BLE Ard2 With Watch's Name <-> Phone BLE

JohnC · Aug 31, 2021

moster67 said:
So try to get hold of the manufacturer and ask if they have an SDK.

Not having a lot of luck with that route.

JohnC · Aug 31, 2021

hatzisn said:
1) The easiest is to download the apk of the Android app and decompile it

I know that it is possible, but I never did it myself - is it time consuming?

GoodGuyOnWeb · Aug 31, 2021

JohnC said:
I know that it is possible, but I never did it myself - is it time consuming?

I use http://www.javadecompilers.com/apk No set up required. Just upload apk and the source is decompiled , which can then be downloaded.

f0raster0 · Dec 19, 2024

I have to use ePapers - super simple to update the info using b4x

bluetooth + ePaper

f0raster0 · Jan 22, 2025

I decided to power up my old Arduino UNO - with a Bluetooth module.
To my surprise, I was still able to make it work using this B4A example

In the Arduino code, I set it up to send dummy temperature data, I can read that and also control ON/OFF the led-Arduino

f0raster0 · Feb 18, 2025

Today, I tested a really nice chart together with BLE and a pulse sensor.

The chart works perfectly!
but I’m not entirely sure if I’m still alive—my heartbeat doesn’t look too good, haha!!

f0raster0 · Mar 8, 2025

Today, I tested this example to control a relay (LED light) via BLE from my PC
looking good

f0raster0 · Mar 27, 2025

JohnC said:
Speaking of BLE...

I purchased one of these $50 chinese smart watches that connect to an android "companion" app so that notifications and incoming call messages can be sent from my phone to the watch's display.

Is there any tool that you know of that I can snoop on the BLE protocol between the android companion app the the watch?

This way I could hopefully write a B4A app to replace the companion app and get the watch to do new things.

@JohnC or you can create your own watch...

Here’s mine: still a work in progress

.... I can connect my own B4X App

thetrueman · Mar 28, 2025

Thanks for sharing good projects to motivate explorers... but can you share some example codes to do experiments? Thanks.

f0raster0 · Mar 28, 2025

thetrueman said:
Thanks for sharing good projects to motivate explorers... but can you share some example codes to do experiments? Thanks.

there are the links to the examples BLE
On the firmware side, I mostly use C (Visual Studio or CCS C), so it's not directly relevant to this forum. Many of these projects are for my clients, I create the initial demo and share it here before go deep in the project or some are to test the new updates B4X

If you have a similar project, my advice is to just start!
And if you run into issues or get stuck, post your question in the forum, many of us will be happy to help

Edit: I have a blog with some projects/demos, but it's currently on hold. Maybe one day I'll release it,but for now, I'm too busy to create something of good quality

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