Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

10
votes
3answers
28k views

What are the fundemental differences of different Bluetooth modules for beginners?

I'm a beginner to microcontrollers and electronics, albeit not really to computers and programming. Starting out with the Arduino, I came to a point whereby I'm really interested in getting my ...
8
votes
4answers
3k views

Choosing wireless tech for lowest possible lag

I am drafting a pub quiz project, where the Referee gives a signal and multiple players push their buttons. The first to push wins the right to give an answer. I want all buttons (referee's + X ...
7
votes
6answers
3k views

Over-the-air upgrades?

I'd like to be able to upgrade software on an arduino without physically touching the device or stringing a cable. Can it be done? Will pick wireless protocol that makes that easiest.
6
votes
5answers
11k views

Programming arduino via bluetooth module issue

I followed a tutorial on how to setup arduino and bluetooth so it can be programmed without usb cables. I didn't use capacitors or resistors asthere doesn't seem to be a need for them. I have the ...
5
votes
5answers
26k views

Can I measure velocity from an accelerometer? How accurately?

I've bought this module Kootek GY-521 MPU-6050 MPU6050 Module 3 Axis analog gyro sensors+ 3 Axis Accelerometer Module My project will involve affixing this to a moving object, moving at velocities ...
5
votes
2answers
922 views

Why is there a plastic sleeve on my HC-05 bluetooth module [closed]

I would like want to know why the bluetooth module has a plastic sleeve covering it? Is it possible to remove it?
5
votes
2answers
6k views

Bluetooth HID module

I try to build custom controller and now searching for bluetooth hid module. Which BT HID module compatible with arduino? (not bluetooth serial) List of some modules: BlueSMiRF HID - from sparkfun, ...
5
votes
2answers
366 views

Simple Arduino Bluetooth Shield Android Display [closed]

I need help with my Arduino code. Here is my setup: LM35 connected to Arduino with output connected to Analog 0. Temperature computation work and serial monitor displays the correct reading. I want ...
4
votes
4answers
2k views

Running multiple tasks at once

For a school project we're working on a wearable device to track people's movement and heart rate. We use an Arduino Pro Mini with a heartbeat sensor and an accelerometer. The wearable device uses ...
4
votes
2answers
13k views

Problems connecting reliably using HC-05 (as bluetooth master)

I currently try to connect an Arduino Micro/Leonardo/32u4 to an ELM327 Bluetooth dongle using a HC-05 Bluetooth shield from iTeadStudio. I also have similar problems trying to connect to a bluetooth ...
4
votes
3answers
4k views

Bluetooth HC-05 module returns encoded data

I have searched online, and haven't found anyone hitting this issue. Strangely my Bluetooth HC-05 is returning encoded data. I have tried using different boards - Induing, Uno, Freeduino and I have ...
4
votes
1answer
48 views

What controller should i use?

I'm working on a little DIY project in which I intend to make my own dataglove. Now I'm kinda stuck on choosing the right microcontroller. And since it can be quite costly, I thought to ask for some ...
4
votes
1answer
494 views

Does an Arduino 101 come with bluetooth HID capabilities?

I would like to prototype an Ergodox-like keyboard. My take on this good design would be to affix each half of the keyboard to my chair's armrests, so that the arms are always in a natural relaxed ...
4
votes
1answer
613 views

HC-0# Bluetooth module questions

I've been playing with the HC-06 BT module lately, but now I want to do more with it and I'm not sure how to. I was wondering if it's possible to get signal strength from the module, or would I have ...
4
votes
4answers
5k views

How do I connect Arduino to a Bluegiga112?

I am a new user of Arduino (I have a Arduino Due) and also I am a new user of BLE112 (Bluegiga module 112) My teacher told me to make the BLE112 advertisable and furthermore he told me to look for ...
4
votes
1answer
2k views

Can an Arduino act as a GATT Server (Bluetooth LE)

I know it's pretty standard to set up an Arduino system as a BLE client, and use something like an app running on a smartphone as the GATT server, which receives the data and does something with it. ...
3
votes
6answers
9k views

Lowest power possible in Arduino

I have googled all around and I know about some tricks to make ATmega328 not being a power hog. I am using Arduino Nano V3.0. However, I didn't find out what is the minimal consumption possible with ...
3
votes
4answers
167 views

Can you help me trim my code?

First of all I want to be clear, I'm not very skilled in programming methods, all the C I learned was for various Arduino projects. That being said, I just finished a project that reads some data ...
3
votes
2answers
12k views

Want to create bluetooth audio control (volume up/down, play, pause, etc.) for smartphone

I want to create a bluetooth remote audio control to control smartphone audio, essentially identical in function to this type of equipment: https://www.amazon.com/FAVOLCANO-Bluetooth-Button-...
3
votes
1answer
636 views

Is it possible to create an electromagnetic wave using PWM?

What would be the simplest way of making an Arduino emit EM waves using PWM (or without)? Theoretically, oscillating a current through a wire would result in an electromagnetic wave, but I don't know ...
3
votes
4answers
12k views

Can't program Arduino via Bluetooth (HC-06) with a Mac

I bought a HC-06 Module for my Arduino Uno the other day, yesterday it arrived and I'm having trouble using it with the Arduino IDE. I set it up, connecting 5V, GND and RX/TX crossed. After a bit of ...
3
votes
2answers
3k views

How to setup HC05 Module to be distinguishable

I'm not sure if this is a dumb question, but here goes 🤞 : I am developing an Android app that uses a custom Bluetooth device as a companion. I'm using an HC05 module to interface the device with my ...
3
votes
3answers
1k views

Communication between two Bluetooth modules of two Arduinos

I am designing a home automation project. I want to control different home appliances through GSM. I am designing it in such a way that each apparatus is connected to an Arduino and bluetooth module. ...
3
votes
1answer
100 views

Which wireless technology should I use for my outside “check-if-door-is-open” project?

I want to connect a magnetic door open/closed sensor to a device that can transmit (or be queried for, whichever) the state of the door to a hub inside (probably RaspberryPi). The outside unit should.....
3
votes
1answer
247 views

Change Servo Speed With RedBearLabs BLE Shield

I recently got the RedBearLabs BLE shield to use it to control two high spped continuous rotation servos. I have the BLE example sketch loaded and the ios controller app works. The problem is that the ...
3
votes
1answer
1k views

Bluetooth Master and Slave to track device's locations

I'm trying to create an app for my science fair that uses bluetooth to track people in a determined place. I was thinking about one Arduino system to receive all the information and transmit through a ...
3
votes
2answers
27k views

HC-06 Bluetooth Module on Arduino Nano

I'm working on a project where I need to have Bluetooth capability on my Arduino Nano to send data from a sensor over to the computer. Unfortunately, I'm having a difficult time figuring out how to ...
3
votes
1answer
510 views

Working with Seed BLE Shield and Adafruit Feather BLE

Long story short: I need to pair these devices: Arduino UNO with Seeed BLE Shield Adafruit Feather 32u4 Bluefruit LE. The Seeed shield is configured and able to connect and communicate via the UART ...
3
votes
1answer
245 views

Bluetooth not transmitting refreshed sensor values

I have a 9 DOF sensor attached to a BLE chip and Arduino Uno. I want to send the position measurements (i.e. x, y and z coordinates) from the sensor to my iPhone app (Bluefruit LE). The code below ...
3
votes
1answer
153 views

Which voltage regulator should I use? [closed]

A friend and I are working on building a smartwatch on a budget, so it’s a (very) low power project, but we are currently having a problem with the power supplying. We already chose this board, ...
3
votes
0answers
5k views

HC 08 Module with Arduino Uno [closed]

I recently bought the HC 08 Bluetooth module (link here). As the specs state, this module supports Bluetooth 4.0 which indicates that it supports BLE (Bluetooth low energy). My goal is to be able to ...
3
votes
0answers
460 views

Connecting Mac to Adafruit Feather 32u4 Bluefruit LE over serial

The Adafruit board connects fine over USB serial, and fine over Bluetooth to a mobile app, but it will not connect to a Mac serial monitor over Bluetooth. Is there any way to use the Adafruit's ...
3
votes
1answer
1k views

BLE SPI Module with ATtiny85

Adafruit carries a number of Bluetooth LE 4.0 modules in their store, notably the SPI (https://www.adafruit.com/products/2633) and UART (https://www.adafruit.com/product/2479) version. I have used the ...
2
votes
2answers
3k views

Can I share the VCC (5V) on my Arduino Pro mini with multiple modules?

Right now I am onto a new project where I am building an obstacle avoiding landrobot. I use an arduino pro mini as my board and I have a few hc-sr04 sensors here at home. The problem I have right now ...
2
votes
2answers
2k views

Connecting Arduino Uno to a smartwatch via bluetooth

I have a U80 Smartwatch from Bluetooth Watch International, which has bluetooth function. It is meant to be connected via to my smartphone (and it works perfectly). I also have an Arduino Uno board ...
2
votes
2answers
128 views

is it possible to write two threads in arduino & switch between data & AT command mode dynamically?

I need to recieve data from a android phone and also estimate distance of phone from the HC 05 module , So i want to write two threads or functions. In one part i want recieve data from android phone ...
2
votes
4answers
9k views

Arduino and HC-05 hardware serial issues

I have a software sending bitmap data to an Arduino Pro 5V 16MHz 328P that drives an LED display (sketch). This works using the USB-Serial adapter for the Arduino Pro with baud rates up to 500000 Baud....
2
votes
1answer
468 views

Resurrecting a fried Arduino (Bluno) USB port

Slightly distractedly, I went and connected 5V to the 3.3V pin on my DFRobot Bluno (the pins are right next to each other!) The magic smoke leaked out of the AMS1117 3.3V regulator in a neat little ...
2
votes
1answer
2k views

How do I connect through a HC-05 to PS4 Controller?

Searching for Arduino and PS4 on google, I find always the same construction using a USB host shield and a Bluetooth dongle. But I'd like to connect a PS4 Controller to a HC-05 device. Is it possible?...
2
votes
3answers
3k views

Arduino board with built-in Bluetooth

I would like to find an Arduino with built-in Bluetooth. I know about the HC-06, the shields and the other Bluetooth modules, but i would like to have built in Bluetooth for eliminating the risk for ...
2
votes
2answers
6k views

Sending data from Arduino to laptop via bluetooth using java

I intend to establish communication between my laptop and Arduino via Bluetooth. I'm using BlueCove Java API. I'm unable to understand how to send data to Arduino using this. There are no clear ...
2
votes
5answers
5k views

Android <-> HC-05 <-> Arduino communication issue

My project involves Android (Samsung Galaxy 2) to Arduino (Uno) communication via HC-05. HC-05 is connected to Arduino on pins 10,11 using SoftwareSerial lib. I got this setup running for a while ...
2
votes
2answers
771 views

Which wireless technology should I use for medium range, many to one, bidirectional communication?

Some clients, let's say 5 <= x <= 10, have to send information wirelessly to a server. Transmission does not need to be reliable (ACK). The range would be between 50 and 100m, and may include ...
2
votes
1answer
42 views

Adafruit Feather 32u4 BLE compatible with Software SPI?

Let me preface by saying that I am not super experienced with electronics. I have an Adafruit Feather 32u4 that is using Hardware SPI to communicate over Bluetooth. Unfortunately, I'm also hoping to ...
2
votes
2answers
121 views

Connect Two Arduino Uno's

Essentially I am looking to build a remote controlled car using dc motors and one arduino uno to be on the car to supply the power logic and i wanted to use another arduino to be the remote. I was ...
2
votes
1answer
11k views

Sending data via bluetooth

I am trying to both send and receive data using bluetooth module. Receiving data works fine with this code: void setup() { Serial1.begin(9600); Serial.begin(9600); } void loop() { if ...
2
votes
1answer
998 views

Funduino Joystick Shield with Bluetooth

I have a Funduino Joystick Shield (See here Funduino on Gearbeast store) which has some Bluetooth pins. Does anyone know what pins they are connected to, and has anyone successfully connected to a BT ...
2
votes
4answers
267 views

Blutooth shield LED control

I am trying to control a led ON/OFF using Arduino UNO and a Bluetooth shield I have this which is based on hc-05. The tutorials I found about hc-05 are not working for me. I have the hc-05 embedded ...
2
votes
1answer
860 views

Reading iBeacon Data using HC-05 bluetooth module

I have bought a HC-05 bluetooth module for Arduino. My requirement is to read data transmitted from iBeacon, is it possible using HC-05 or I have to shift to HM-10?
2
votes
2answers
343 views

Cheap medium range wireless communication with a linux PC

I have a project that's currently using Arduino Uno with a cheap class-2 bluetooth serial adapter from ebay to send and receive data and control a LED light strip. However, it struggles to establish ...