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

Frequently Asked Questions

ABG January 1, 2020, 8:32pm 1

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

App crashing when receiving data via Bluetooth

Select list item: list index too large

Receiving Data in different text boxes

App is losing BT connection to HC-05, but BT will maintain a stable connection to BT Serial Terminal

Read Multiple Potentiometers

Bad arguments to> the operation cannot accept the arguments: [ 34.36 ],…

Separar dados enviados por Bluetooth

Send data from arduino to appinventor via bluetooth

Select list item: list index to large

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

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

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

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

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

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

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

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

Value too low, in range, or too high

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

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

Arduino to android error

Bluetooth app not working properly, connecting and disconnecting randomly

Delay in processing data sent to Arduino using HC-06 from Android app

How to send a text from an esp32 to app inventor?

Pls help me with error 507, Unable to connect. Is the device turned on?

I cant figure out the problem, arduino uno3,bluetooth hc-06,flexibility sensor and a FSR

Use receiving Bluetooth text to trigger sending bluetooth text

How do I filter receiving bluetooth data?

Receive data from Bluetooth

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

Bad arguments to <= the operation <= cannot accept the arguments:, [" "], [20]

Do my Indexes match my Code? (Bluetooth classic)

Señal ECG y lienzo (ECG (EKG) signal and canvas )

Updating Values Through App

plz help me. It originally worked, but it doesn't work. Please fix it.

Error help! plz ---segment: start(3) + length(8) - 1 exceeds text lenght(0)

values are repeated

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