Hello, i'm planning to make a project. How can i save the sensor reading data from arduino to phone storage that will be use in my mobile app. Also, i will be using Bluetooth module to connect my arduino and mobile phone.
Welcome to the forum
It sounds like you need an app on the 'phone that takes receives data via Bluetooth and saves it. That is not an Arduino question
The Arduino end of things is easy
Read the sensor value
Send the sensor value via Bluetooth
Where are you stuck ?
Have you written any Arduino code ?
Which board are you planning to use ?
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The second option would be to use a microcontroller with WiFi onboard
ESP8266 or ESP32
This offers to send the data with UDP or TCP.
The idea using a smartphone comes in "handy" as it is always ready to use.
In all cases you need a specialised app that will receive the data and store the data.
Depending on what you want to do with the data using a smartphone might be not the best option.
Storing the data to an SD-Card or sending the data with WiFi to a WLAN-network and storing the data on a computer might be an option too.
If you post a description of your whole project good suiting suggestions can be made.
best regards Stefan
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The first thing you need to know is that this is really simple. You can do this with with a ready-made bluetooth terminal on your phone. If your phone is Android, you can do this using an HC-05 or HC06 and the same code you might be already using to send the data to your serial monitor. You might then be interested in Bluetooth Graphics Terminal, by Emrecan Cetin, which is God's gift to Arduino users.
IF, by "my mobile app" you mean a mobile app you have written yourself, the first thing you need to do is consider whether you actually need to do that.
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