Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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2answers
32 views

Hc-05 bluetooth module pairing issue

Module light is blinking/working but it's not showing for pairing in my smart phone.I have supplied it 3.3 volts and have tried different phones.
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1answer
41 views

Bluetooth module(HC 05) issues

I am trying to make a Bluetooth controlled 4WD robot. i was following a tutorial i found online (https://howtomechatronics.com/tutorials/arduino/arduino-robot-car-wireless-control-using-hc-05-...
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0answers
19 views

Bluetooth connection problem

I am using Arduino Uno and Blue tooth HC-06, I am trying to use this in order to switch a LED through mt phone but I cannot create communication between the Bluetooth and the Arduino, I am using ...
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1answer
31 views

having problems with my arduino bluetooth car project(with L298n Motor Driver)

so the scenerio is i am making a bluetooth controlled car(voice control)+obstacle avoidence function.I am using arduino uno with L298n motor driver and a HC-05 BT module in the sensors i am using the ...
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1answer
53 views

can i use bluetooth from a speaker as a bluetooth module?

i have a Bluetooth speakers that i don't want,and i was wondering if i can use its Bluetooth as a Bluetooth module to use it with Arduino. if so how what pins should i use. here is a pin diagram for ...
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0answers
21 views

Bluetooth no COM port connection? ESP32

I am experiencing issues sending serial data via bluetooth with my ESP32. When the device is plugged in, I am able to call bluetooth, and connect to PC and even obtain the serial data via the ...
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1answer
28 views

Wrong data receiving in my Arduino by bluetooth

I have programmed a client-server between an Arduino and my mobile app in Android. I´m using a buetooth HC-06. For the moment is a very basic code just to turn ON/OFF a led, regulate its voltage, and ...
2
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1answer
48 views

PT2257 only gives me heavy buzzing sound

I have this project where I control a bluetooth audio module with an arduino. In this case, I have used an arduino nano. But then, I have been meaning to add volume control to the project so I use a ...
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0answers
20 views

CC2541 Bluetooth AT Commands not work for any Commands sended from Serial

i bought the HM 10 Bluetooth controller (CC2541), i got connect on this device through Serial Bluetooth Terminal (Android App) with Serial BLE menu this method not requires any pass and "...
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2answers
90 views

Convert character to Integer while leaving encoded

I have two characters, that I get by Bluetooth. char a = SerialBT.read(); char b = SerialBT.read(); According to the Arduino Reference, decoded data stored in a char gets encoded to ASCII text. I ...
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1answer
28 views

Failed HC-05 Bluetooth sketch upload - (port and board correct)

I'm running this project with HC-05 https://create.arduino.cc/projecthub/millerman4487/view-serial-monitor-over-bluetooth-fbb0e5 and I am getting connection error. I have ensured my port selected and ...
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0answers
21 views

Using HC-05 with digispark attiny-85 development board

pins 3 and 4 of the digispark are used as RX and Tx; I'm using the softwareSerial library. The code turns the on-board led on when serial.available() returns a value, but the light doesn't turn on. #...
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0answers
21 views

Ardunio wireless voice transmission

I made a project based on calling with gsm module and arduino and now i want to transmit to voice wirelessly to my bluetooth earphone which module should i use for this purpose.
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0answers
10 views

Get client information on BLE

So I'm working on a personal project using bluetooth abilities to start a BLE server and want to automatically retrieve a client's information after it's connected: ID so I can keep track of clients, ...
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1answer
35 views

ESP32 nodemcu serialbt sending data

I'm currently trying to send data from esp32 to my android app that I made. The sensor readings are showing in the serial monitor, however, what's showing on my app are either @ or &. Please help ...
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1answer
21 views

How to send and receive multiple integer values through serial comm for Arduino Micro and HC05 bluetooth?

I need to send gyroscope values and a voice command flag and counter with a start and end marker through serial in the format <2,4,5,6> through Arduino Software serial using the HC05 Bluetooth ...
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1answer
34 views

ESP32 start BLE after deep sleep

I'm new to using the esp32 as a microcontroller. I'm currently working on a so-to-say remote control. Since I want to use the esp32 with an external battery I need to put it in deep-sleep after I ...
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1answer
55 views

Using HC-08 bluetooth module with arduino

I have an arduino mega 2560 and a recently purchased HC-08 module and the connection is as the following: Arduino | HC-08 VCC - VCC GND - GND 14TX3 - TXD 15TX3 - RXD When I power up the arduino it ...
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0answers
64 views

Cannot pair HM10 BLE 4.0 module from Android phone

I am currently learning Arduino Bluetooth connectivity with a HM-10S module. I did some sample tutorial code and it works only with LightBlue app. However, when I use the default Bluetooth pairing ...
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3answers
39 views

sensitive distance detection using 2 HC-05 module/ 2 arduino unos

Hi I am doing a project in which I use 2 HC-05 modules and 2 arduino unos driving them. 1 bluetooth module is master and the other is slave. Master module is stationary while slave is moving. If the ...
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2answers
32 views

double type sensor data is not displayed on bluetooth terminal app on phone

Hi I am working on a project in which I am supposed to tell if a person is running/standing/walking and going upstairs/downstairs or he is on straight road. The person will carry a arduino uno module ...
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0answers
22 views

How to fix why AT command gets no response from serial monitor for HC-05 Bluetooth module with Arduino Micro?

I am trying to send numeric data from master HC-05 to slave HC-05 Bluetooth module for the purpose of processing it. But I first need to pair the Bluetooth module. I have tried different tutorials and ...
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1answer
165 views

Anyone have example code for ESP32 as media controller for Android/iPhone Media Apps

There's actually another post with this very same topic but no answers on that post. Back in January of 2020, the last commenter said he had sample code and then he went dark without posting the ...
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1answer
24 views

Sending Strings from NRF24L01 to app

I want to send pushbutton status from the nrf24l01 module to the app named nrfConnect. I could only find libraries that allow me to send float values. How could I send String values to the app? Thank ...
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0answers
35 views

sent commends by bluetooth to sd card as one line of string

void loop() { if (Bluetooth.available() > 0) { dataIn = Bluetooth.readString(); //the problem is here while(dataIn !=""){ dataSd += dataIn; ...
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1answer
21 views

Write a Struct using ArduinoBLE library

Hello I'm trying to send some Structs such as: typedef struct __attribute__ ((__packed__)) myohw_command_set_mode { myohw_command_header_t header; ///< command == myohw_command_set_mode. ...
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0answers
21 views

Is it possible using a hc-05 bluetooth module as master and pair it to a hc-06 module?

I have configured a hc-05 bluetooth module as master and a hc-06 module as slave an since the LED on the hc-05 is blinking in a 2s delay they should be paired but no matter what I do I can't send data ...
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0answers
19 views

Arduino : Not receiving complete data over Bluetooth when serial printing is enabled

I have written an android application that sends IR codes of different appliances to Arduino over Bluetooth (HC05). Below you can find my android code and data which is I am trying to send to arduino. ...
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1answer
22 views

Can Bluetooth HC-05 Module detect other modules and relay data back to phone?

I want the following to happen: The HC-05 is paired to a phone. The module is called "Amy". The module is worn, say, as a wristband by a person. Amy passes another wristband-with-HC-05-...
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1answer
22 views

How to connect HC-06 with HC-08 with the HC-06 as master and HC-08 as slave?

How do you connect HC-06 with HC-08 with the HC-06 as master and HC-08 as slave? I will try it using 2 Arduino Unos.
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0answers
16 views

HC-08 Bluetooth module not showing up on iPad

I have an HC-08 Bluetooth module Bluetooth module hooked up to an Arduino Uno but for some reason, it doesn’t show up in the Bluetooth menu in my iPad settings. Can you help?
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0answers
19 views

How to upload code to an Arduino Uno using HC08 Bluetooth module

How do you upload code to an Uno from a Mac using the HC08 Bluetooth module? I know I need to use this wiring. Anyone know?
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0answers
37 views

Radino40 Breakout Board

I would like to control the Radino40 breakout board with arduino. But i don't know if is it possible. I know that the single Radino40 DW1000 antenna could controlled by Arduino through SPI, but my ...
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2answers
61 views

How to interpret Serial data received by Bluetooth module

I'm experimenting with a hc-05 knockoff the JDY-30 and am confused about the Serial data I'm getting from it. I downloaded an app called BlueUino to send commands from my Android to my Arduino Uno via ...
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0answers
50 views

Bluetooth module HC-05 firm 3.0, master connection impossible

I recetly acquired a Bluetooth Module for Arduino, the HC-05. My project is to create a dashboard thanks to ELM327 Bluetooth OBD. But my HC-05 is with firmware 3.0, and during my research I discover ...
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0answers
16 views

Problem with setting up HC-08 bluetooth module

I recently bought a HC-08 Bluetooth module and use below code for test that: char val; int ledpin = 13; void setup() { pinMode(ledpin, OUTPUT); Serial.begin(9600); } void loop() { if( Serial....
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1answer
45 views

Motor cutting out when using HC-05 Bluetooth module

I'm using an L293D motor driver chip along with an HC-05 Bluetooth module. The two work as expected separately - I can send a string via a Bluetooth terminal app on my phone to the HC-05 and I see it ...
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2answers
37 views

Long term stability of bluetooth connections

I have two Arduino Megas with HC-05 on Serial1 connected to a Raspberry Pi 3b+ via bluetooth, using the HC-05 and the RPi's built-in bluetooth, and python's pySerialTransfer library to make the ...
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1answer
42 views

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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1answer
71 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
34 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
32 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
80 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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0answers
30 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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0answers
78 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
121 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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2answers
44 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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0answers
84 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
71 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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0answers
23 views

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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