FAQ Section: Bluetooth < version 4 (BlueTooth Client) and Arduino

Frequently Asked Questions
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Arduino HC-06 tutorials

Arduino USB - Pavitra and Thunkable

Arduino via USB

Delimiter usage for receiving one message per ReadText

DHT22 Temperature or Humidity, no Clock - kio4.com

How to send CR the hard way

http://www.martyncurrey.com/android-mit-app-inventor-auto-connect-to-bluetooth/

Instructables YouTube course on Arduino/AI2 - Magesh Jayakumar

Martyn Arduino Bluetooth sketch

Sending Slider Data to Arduino - Neil Kenyon

Turning a LED on and off with an Arduino, a HC-06 and Android

Turning a LED on and off with an Arduino, Bluetooth and Android. Part II: 2 way control

Turning a LED on and off with an Arduino, Bluetooth and Android. Part III 3 LEDs and 3 Switches

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Receiving data from arduino
I need help receiving text via bluetooth, please
Select list item: list index too large
App crashing when receiving data via Bluetooth
Receiving Data in different text boxes
Select list item: list index to large
Separar dados enviados por Bluetooth
Bad arguments to> the operation cannot accept the arguments: [ 34.36 ],…
Read Multiple Potentiometers
Send data from arduino to appinventor via bluetooth
How do I filter receiving bluetooth data?
Mixed Variablen received, sometimes a error
Runtime error _cannot accept arguments
Bluetooth data is displayed as text
Mi app no muestra correctamente los datos enviados
Cómo compruebo que los datos que recibe el app por Bluetooth estén en mi lista e imprimirlos
Send different messages depending on the value
Necesito ayuda para recibir datos y filtrar 18 datos numericos desde modulo HC 06
Bluetooth message processing
Improving output
How can I read serial plotter of arduino via bluetooth?
The Operation < cannot accept the arguments: , [""], [5]
Text shifting/dissapearing from screen
How do you turn string variables to number variables?
Select list item: Attempt to get item number 2 of a list of length 1:
Remote control and angle data displayer with Arduino Nano, MPU6050, and HC-05
Select list item: Attempt to get item number 19 of a list of length 18
Bad arguments to <= error observed
Solving Runtime errors
Bluetooth receive text from Arduino
Bluetooth data glitch, please help
App inventor TinyDB(data base)
Serial comunication with Arduino Mega - Serial monitor problem
Update Switch status in app after switching LED on and off using arduino button
Cannot send text over HC06 bluetooth module to the App
Using two sensor ultrasonic HCSR04
Sensor reading, bluetooth data reading
Show DHT11 data on app with blouetooth
Bluetooth Client1 not working
How can I compare variable with number?
Select list item: list index to large
HELP! App inventor receives chars in ascci mode via bluetooth
How Can i write the value come from arduino by bluetooth in my app?
Shifting temperature readings from Arduino Uno over bluetooth
How to use buttons on esp32/arduino to control MIT app inventor aps via bluetooth?
Graphing data received via Bluetooth from Arduino not graphing what I was expecting(?)
Receive data from mcu and scan barcode
Receive data from Bluetooth
Getting inputs from arduino/ and saving bluetooth mac address to use later
How do I solve the delay and button that doesn't work in my Project?
Need help for ListPicker function
App is losing BT connection to HC-05, but BT will maintain a stable connection to BT Serial Terminal
Displaying received Bluetooth information
I couldn't get the sensor readings on my phone, can you please help!
How to use buttons on esp32/arduino to control MIT app inventor aps via bluetooth?
How to read multiple values without overlapping the data?
Converting Text list to two different lists of numbers
Codes doesn't work (arduino,MIT)
Classroom attendance app
Argument problem in the app, after receiving data via bluetooth
Strings to Bytes
Hi, i want to send message automatically please help me
List index too large, Select list item
Arduino get not the whole number sending from App Inventor
Arduino and App Inventor Timing
Arduino get not the whole number sending from App Inventor
App that can read battery level, load connected, e.t.c in an inverter
List index too large help required
Problem with readout of temp data
Use receiving Bluetooth text to trigger sending bluetooth text
MPU 6050 moving ball
Not inserting into database
Reading Multiple Sensor Values via Bluetooth
Attempt to get item number 2 of a list of length 1
How do I make a voice alert message using ardiuno uno software and mit app inventor?
ASCII code sent from Arduino to App
How to display bluetooth data onto listview
Help my graduate project!
Led on off using single button through bluetooth
Bluetooth data parsing problem
Cannot get label.text to show
Get Notify when BluetoothClient Receive data
No suena sonido (Urgente!)
TX/RX problem. App to Arduino
2 joystick to pilot a drone
Receive different data for two text boxes
Configuration of switch
How do I analyze data in app inventor?
The operation < cannot accept the arguments: , [["�"]], [80]
Send data from phone to arduino to regulate a led brightness
I cant figure out the problem, arduino uno3,bluetooth hc-06,flexibility sensor and a FSR
Como converter informação que recebe pelo blutooth em numero que pode fazer operações matemáticas
Android BT list issue
Having some error message with get block
List from csv table i can't get the data
Im trying to use bluetooth with arduino, and I need app inventor to connect. But i get the error The operation > cannot accept the arguments: , [*empty-string*], [10]
The operation <= cannot accept the arguments: , [*empty-string*], [35]
Time Delay Not Working
Difference between blocks at receive text from bluetooth
How to receive long serial data bytes(31 bytes) through Bluetooth module
Select list item: List index too large ..kindly tell
How to read live sensor data in Android MIT app while also sending commands to Arduino via Bluetooth
Error 507: Unable to connect
Equation problem
Error message always popup(Error 515 : not connected to a bluetooth device) even have connected to BT device
App fail to run with the arduino code
Display Different colors based on data received via bluetooth from sound sensor
Select list item : list index too large
Char split in app
How to get 3 ir sensor data from arduino to app
Pls help me with error 507, Unable to connect. Is the device turned on?
Display Different colors based on data received via bluetooth from sound sensor
Connect to arduino
How to show value received from HC-06 as a graph?
List index too large
Bluetooth client speed and buffering issue
Bluetooth Connection in other screens
Hc-06 serial to app inventor
Bluetooth Connection in other screens
Arduino to android error
App inventor +arduino
Power meter with LCD 20x4 + HC-05 BT readings - HEELP
First time and trouble with multiple sensor program
bad arguments to quotient
Arduino Bluetooth data transfer mystery
Problem graphing data from Arduino Bluetooth to Screen 2
The operation > cannot accept the arguments
Converting values in mit app inventor
Split a string and store the separate snipsel
Error 515: Not connected to a Bluetooth device even my app is connected to its arduino
Bluetooth multiple button read
I can't send two datas at the same time via Bluetooth
I can't send two datas at the same time via Bluetooth
Bluetooth reading stuck on first value
Plotting live sensor data using BME280 and HC-05 module
My app freeze when I connect to the HC-06 Bluetooth Module
Error List index too large
App crashing when receiving data via Bluetooth
Value too low, in range, or too high
plz help me. It originally worked, but it doesn't work. Please fix it.
HC 05 Flow rate
Señal ECG y lienzo (ECG (EKG) signal and canvas )
Error help! plz ---segment: start(3) + length(8) - 1 exceeds text lenght(0)
values are repeated
Do my Indexes match my Code? (Bluetooth classic)
App crashes, maybe because of simoultaneous clocks and bluetooth?
Receive data via bluetooth
Bad argument to select list item - in need of help
Problems with my APP (Bluetooth,dht11)
Display MPU6050 X and Y-readings on a App
How to fix the delay when receiving data of HC-05?
Display Different colors based on data received via bluetooth from sound sensor
Error 515: Not connected to a Bluetooth device
Questions: app receive the integer send by Bluetooth
Tips for outputting strings to the right variable?
How to convert received ASCII data to a value
App to realize graphical data from a microcontroller(PSOC) and storing the data
Select list item: Attempt to get item number 2 of a list of length 1:[“[]"]
Select list item: List index too large!
How do you separate serial sensor data from raw data string with "\" as delimiter?
Select list item: List index too large issue
Application not displaying correct graph with HC,05