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Question of the circuit to transmit external signal to a smartphone app

bhl3302

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Hi all,

I have the following target to achieve and want to know what kind of circuit that I can use? Anything that can be purchased in the market directly is preferred. Thank you!
IOT Question.PNG
 

KlausST

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Hi,

Look for bluetooth modules.
Like HC-05 or similar.
You may reprogramm them with Arduino iDE.

Similar:
ESP-1 or ESP-01 modules (WiFi)

You could also use IrDa if your cellphone supports it.

Klaus
 

betwixt

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+1 for Klaus.

Personally I use ESP8266 or ESP32 modules for this because they are very inexpensive and you don't need an app on the phone, they can publish their own web page with your sensor information in it. If you link them to a Wifi router you can also make the link work over the internet so the phone doesn't have to be in close proximity.

Brian.
 

bhl3302

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KlausST

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Hi,

The linked site tells you everything you need to know.

What additional information do you need?

Klaus
 

bhl3302

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Hi,

The linked site tells you everything you need to know.

What additional information do you need?

Klaus
Hi Klaus,

I want to know in addition to that design, if I add a prox sensor circuit to output "1" or "0", how can I connect it to the Arduino and modifying the firmware, thus the BLE can output a control signal to tell the app what is the signal generated by this prox sensor. I only know some hardware and do not know what can I start to modify the Arduino code.

Thank you!
 

KlausST

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Hi,

You give more riddles than informations.

Define:
* proximity sensor
* Arduino
* modifying the firmware
* control signal
* what you want to achieve at all

Use pictures, diagrams, clear descriptions....

Klaus
 

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