Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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16 views

Locate a second arduino accurate. Auto following bike trailer

My neighbor recently had an idea about a (at least nearly) wireless bike trailer, which follows the bike by its own. Now I try to figure out how to build the electronics. I want to send break and gas ...
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33 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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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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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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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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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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15 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
19 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
21 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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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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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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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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52 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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19 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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12 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
34 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
34 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
25 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
33 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
29 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
27 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
53 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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37 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
50 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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41 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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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
30 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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22 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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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
177 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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1answer
38 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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2answers
57 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
29 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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1answer
30 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
81 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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29 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
35 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
21 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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1answer
44 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
71 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
178 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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23 views

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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156 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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51 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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2answers
90 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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243 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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