Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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Debugging RN 42 HID Mouse

I'm trying to use the RN 42 and Arduino Uno to control a bluetooth mouse. I configured the RN 42 with the commands S~,6 and SH,0220 and R,1 to put the device in HID mouse mode. Is there anything I ...
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21 views

Bluetooth: sync time from an NTP server via Internet connection shared with Android phone

I saw that it is possible to sync time from an NTP server over WiFi. I have the HC-06 Bluetooth module and an Android phone that can share its Internet connection with Arduino via Bluetooth. Would it ...
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1answer
27 views

Bluetooth: read a user provided value and then obtain time from an Android phone

I'm new to Arduino and try to accomplish following 2 things (via Bluetooth module connected to an Android phone): read an integer value provided by user. obtain current time from the phone (the ...
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1answer
21 views

Reset HC-05 from within Arduino sketch

I have an HC-05 Bluetooth module attached to an Arduino Mega; the module is paired with a Raspberry Pi and fed data via a python program; there's roughly one send and one receive per second of about ...
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1answer
33 views

Arduino communication to Raspberry Pi using HC-05

I'm using two HC-05 modules on two Arduino UNO boards. One of my modules connected successfully to a raspberry pi port. However the other doesn't want to connect, but sometimes it does and then ...
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29 views

Bluetooth Module 4.0 BLE

I'm trying to read data sent from my phone to arduino via HM-10 Bluetooth Module. I downloaded the app, I paired the module to phone but I can't read data. If I just upload a blank sketch to arduino ...
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26 views

Audrino as hid bluetooth adapter

I am trying to create a bluetooth adapter which allows me to connect my keyboard + mouse via bluetooth and act as an HID device on my computer via USB. I want to be able to switch between operating ...
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1answer
26 views

Does the MKR WIFI 1010 support the arduino mouse and keyboard controller?

I am working on a project right now that needs to connect to my computer via bluetooth and access the arduino mouse and keyboard library. In my research, I've found that only the Leonardo, Due, and ...
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40 views

Getting external data to the Arduino

I have a new Uno R3, it's pretty cool and I've enjoyed playing with it. Now I want to build a couple of things: 1) a market price LCD tracker. 2) a servo motor type thing to open my electric gate. ...
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27 views

ESP32 Low Power Reconnect Latency Question

I am trying to develop a small 9-button BLE keyboard on the ESP32 with a rotary encoder as a volume knob. My question involves the low power modes and the time it takes for them to wake up. My ...
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1answer
29 views

Web page using bluetooth?

I have a project where I read 2 sensors using an esp32 and also have an web server. I can connect using mobile phone and display the page where I see info about the sensors (using web sockets to ...
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Control of 3 LEDs over Bluetooth using MIT App Inventor

As per title, I have 3 LEDs connected to an Uno. Also connected is an HC-05. edit: forgot to add a question, my bad. Is there any glaring major issues in this code that I've overlooked? Not ...
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How to use HC-05 to recieve data?

I am trying to control an led with a bluetooth module, but it is not working with an if else condition. When I use this code I found on the internet the led blinks when I send the string from an ...
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1answer
65 views

Send/receive data from/to Raspberry Pi to/from Arduino with HM-10 (Bluetooth LE module)

My goal is to send a string from an Arduino via an HM-10 bluetooth module to a Rasperry Pi. I do this today by connecting the HM-10 on the Arduino to another HM-10 module (master/slave) and then from ...
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27 views

Making a Bluetooth Mouse with Arduino

I'm trying to make a bluetooth mouse using Arduino. I will be using an analog 2 axis thumbstick as the sensor. I understand that it's possible to do this with the Arduino connected directly to the ...
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33 views

Wireless Bluetooth USB HUB using Arduino nano

I have the following problem/idea: I have a electronics workbench and a separate PC desk. Now I have a USB HUB on the workbench, but it doesn't properly work, because the USB-cable to the pc is too ...
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1answer
28 views

SimpleChat BLE Example prints scrambled characters

I am trying to use the SimpleChat application to test my RedBearLab Shield. If I send "Hello" and to to Serial.print or Serial.write the return what I see in my Serial monitor is stuff like "Fh`Fx**-...
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29 views

How to connect RedBearLab BLE shield (Or how to find Nordic_nRF8001.h)?

I am trying to explore the possibilities of connecting an Arduino to Phonegap/Cordova. I have a RedBearLab BLE Shield, which I want to test the connection with. My MVP would be to get the value of a ...
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1answer
49 views

serial is print twice?

I have a problem , when send 1 or 0 by Bluetooth module the serial monitor print two time (RECEIVED SMS) . what's the wrong ? This is my code : char BluetoothData = 0 ; void setup() { // ...
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27 views

Bluetooth module HC05 does not react to bluetooth signal from smartphone

I try to switch off two leds with a hc05 module by sending the signal from my phone. I know there are a lot of examples on the internet and I tried some of them, but they dont work either. I use a ...
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1answer
27 views

Arduino bluetooth HC-05 data reading problem

I have a problem with bluetooth module HC-05 and servos. If I type in bluetooth terminal 4,1 I want that servo1 turns 60 degrees 3 times. Briefly servo1 turns 60 degrees and then servo2 goes 180 and ...
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1answer
20 views

Receiving multiple Values from android via Bluetooth [duplicate]

my question is, how can I receive 3 integer values in Arduino, which I send from my android phone. I send all 3 values at the same time and I also need to read them in about the same time. I hope you ...
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32 views

TX,RX,ON,l LEDs were red at all time

First of all Thank you for reading my broblem.Before coming this erro I did a project in my Uno board by using a Bluetooth module.after that; when I powered the board to uploade another programe ;4 ...
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31 views

Arduino acting strange with photoresistor data

So I stumbled into strange problem. I have this circuit, where I connect 2 photoresistors and bluetooth HC05 to Arduino. When one of the resistors senses bright light bluetooth sends '1' or '3' ...
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1answer
70 views

Serial communication by bluetooth hc-05

i am making a ultrasonic radar using stepper motor and ultrasonic sensor , and displaying the output over a software(processing 3) which looks like a radar ppi on display ...is it possible ot replace ...
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2answers
176 views

How do I make a proper long string scanner to detect specific tags in a stream of characters?

Here's my code: #include <SoftwareSerial.h> SoftwareSerial BTserial(2, 3); // RX, TX void setup() { Serial.begin(9600); BTserial.begin(9600); Serial.println("Communication with HC-...
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CLOSED - Wondering if someone with more experience could help me with an hc-08 bluetooth module

I am currently working on a simple arduino project that involves a bluetooth module. I decided to use an hc-08 bluetooth module I had lying around from a kit I had (although it seems to be a more ...
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86 views

ESP32 Bluetooth SPP Max Speed

I am trying to understand the maximum BT SPP transmission speed that can be achieved using ESP32. What my project requires is to send 2bytes of data every 200us (5kHz) AND additional 15bytes of data ...
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1answer
58 views

First time working with arduino, need help adapting project from UNO to NANO

This is my first time working with an arduino and I'm having some issues when trying to copy a program I found online on my Nano. Basically, my project consists in a pulse sensor that sends the pulse ...
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40 views

Task watchdog gets triggered during Bluetooth initialization

The board ESP32-Dev-WROOM-32D cannot establish a bluetooth connection due to the task watchdog. Here's my code: #include "BluetoothSerial.h" //check if Bluetooth is enabled #if !defined(...
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Virtual terminal for my Proteus 8 professional is unable to read the correct value of the data i entered

I am trying to develop proteus simulation for remote-controlled robotic car using two Bluetooth modules one attached with the robot and the other used as a controller remotely. the two Bluetooth ...
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80 views

MCore(Arduino) - Python bluetooth communication

Pc and Mcore with bluetooth module are paired. The port is COM9 outgoing in PC. However, when I send message Arduino does not get anything. I just disconnect arduino from pc and write simple code in ...
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155 views

Cheaper alternative to Arduino Nano 33 IoT with BLE?

The Arduino Nano 33 IoT looks great with its builtin Bluetooth chip. At ~€20 (Germany) it's pricey though and seems overkill for what I need anyway. What is a good, cheap alternative for a simple ...
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28 views

Arduino-compatible Bluetooth classic module to use in a product

I've been designing a product for some time using arduino language, but on our own hardware. Recently a need arose to add some Bluetooth capability to our product. We decided to use BT classic instead ...
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1answer
40 views

Which board to use for wireless communication of small packages? [closed]

I was hoping to get your advice on what Arduino boards to look at for a project I'm working on. The project involves two separate boxes in different rooms of my apartment (~ 5-10 feet away from each ...
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1answer
73 views

Why my 4WD Bluetooth car run so slow

Code /*Arduino Bluetooth Controlled Car * * Created by Glen Tech * https://www.youtube.com/glentech */ #include <AFMotor.h> //initial motors pin AF_DCMotor motor1(1); AF_DCMotor motor2(...
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70 views

How to connect HC-06 BT module without pins?

So, from one popular Chinese store I ordered a HC-06 module that I received... and due to some mistake from a store, I received a HC-06 without connecting pins. So usually HC-06 looks like this (with ...
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121 views

Arduino Bluetooth upload problem HC-05 v4.0

I upload code into arduino nano using a self-made PCB with bluetooth using this method. I was initially using Arduino Nano (chinese Clone, the one with CH340G) and Bluetooth module HC-05 (version 3.0) ...
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34 views

How to quit flash mode on HM-10?

I have an HM-10 BLE module connected to Arduino Leonardo. It forwards UART from my computer: #define btSerial Serial1 void setup() { Serial.begin(9600); while (!Serial) { delay(50); ...
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96 views

Alternatives to hc05?

Are there any alternatives to hc05 that are smaller than the hc05 i am making a project and i require a bluetooth module that works like the hc05 but has to much smaller
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35 views

Record stereo audio from two Bluetooth headsets

I've been playing with Arduino for a few years, but I'm new to Bluetooth and streaming audio. I'd like to develop (or assemble or buy) a device for recording stereo audio from a pair of Bluetooth ...
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51 views

Long range wireless RC airplane control

I pretty new to Arduino and I need help to clarify some things. First, I want to make an Arduino controlled RC airplane but I don't know what communication module to use. I did some research and ...
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24 views

Bluetooth not discoverable using feather nRF52832

I just bought a feather nRF52 but I can't make the Bluetooth LE work ... I followed to tutorial (https://learn.adafruit.com/bluefruit-nr ... troduction) which features the same information that on the ...
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1answer
246 views

How to connect ESP32 to HC-06?

I am making a small project (BT controlled "tank") and need to connect ESP32 with HC-06 (ESP32 will be in controller and HC-06 in the vehicle). Android phone communication with both ESP and HC-06 ...
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1answer
120 views

json format in esp32 with arduino json

I am using an ESP32 module for bluetooth connection and scaning wifi network. But I cannot format the json using arduinojson library in the way I want. void scanWifiNetworks() { //creating json ...
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1answer
65 views

How to make BLE data accessible to a particular app?

I used the BLE example from here. But any device can read and write to the advertised characteristic. Is there a way to make the data inaccessible to other devices except for my app somehow. What I ...
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1answer
30 views

The problem of not saving the previous value when sending it from bluetooth

Controlling Led's from Buttons and Bluetooth by same method The problem now : the LED light up when you send an A over Bluetooth and it will turn off after 2 sec automatically without you doing ...
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1answer
37 views

My millis() code doesn't work

I am doing a project with bluetooth and an LED. I wrote a code which supposed to turn on an LED after it receives a byte of value 1 after 5 seconds, unless it receive another byte of value 1 (which ...
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1answer
91 views

i can't work toggle for my small project

i build my small project from a few component as this photo after finish code and project . i work run for Proteus and then the project not run perfectly because my code need toggle for data entered . ...
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1answer
31 views

using multiple hc-05 with one arduino mega [closed]

please anyone help me build my project, i want to connect multiple smart phones to arduino mega using blutooth module hc-05 , I am working on real life home automation project and i don't have idea ...

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