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

Frequently Asked Questions
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How to speed up transmissions using \r - @tjblair1951

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