Hi, I'm new on this forum, I'm Edoardo and I need to do a school project. I would like to say tha I'm newbe in electronic. I need help to understand what components and how to do:
a bracialet that can starts a sinlge call to a default number (like emergency number) holding 1 button on it. If possible, would be cool adding a microphone, but is not essential.
I wonder if it is not too hard make it. I can use a 3d printer for the body, but the problem for me is understand what parts I need (like bluetooth module, microprocessor, battery...). I need to create an app on android? how can bracialet and smartphone communicate?
I hope you can give me some hints, if possible link me a list of components i need to use, I would be so glad.

Thank you so much

 

https://circuitdigest.com/microcontroller-projects/sending-sms-using-esp8266

 

Or a bracialet that can explodes a bomb?

 

https://circuitdigest.com/microcontroller-projects/sending-sms-using-esp8266

Thanks, I found it useful. But There are 2 premblems:
1. how can it work if 'm not At home using wifi? Wouldn't be better a bluetooth module?
2. The power Board is big, can I use a Coin cell lithium battery?

 

Welcome to AAC!
Perhaps something like this could be used? Overview claims a range of 30-150 metres.

 

Welcome to AAC!
Perhaps something like this could be used? Overview claims a range of 30-150 metres.

Hi Alec_t, I think that it is interesting, I'don't know how it works. It's possible to connect it via Bluetooth with an android smartphone device? How can I set up it? arduino IDE could be ok?

I only need to create a small device that can communicate someway (bluetooth, wifi) with an android device, pushing a button, sending an information (make a call, or send sms, whatsapp... everithing is ok)...

The guide that shteii01 sent me is ok, but my question is: I can use it outside?
The parts I need are 1 board (wifi/bluetooth, like BLE112), probably 1 serial adapter module to pair devices(?), 1 perf board... and how to power the device using a single coin cell lithium battery?

Sorry, but I'm confuse about a lot of things XD

 

To understand the BLE112, a good starting point is its datasheet. There may also be Application Notes available for it. The module is said to include a 8051 processing core with space for user apps. I'm no programmer or wifi/bluetooth expert, so can't guide you there.
This project is perhaps more complex than you realise.

 

Thanks for the repost Alec_t. Is this BLE programmable with some software like Arduino IDE? What about other essential components?
If you can give more informations it would be useful.
I have seen ESP32 module, is this a BLE like what you suggested?

If someone have some tips please tell me thanks

 

Is this BLE programmable with some software like Arduino IDE?

It's certainly programmable, but I've never used a BLE or an Arduino so can't say.