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Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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15 votes
2 answers
37k 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 ...
Phil's user avatar
  • 455
13 votes
3 answers
32k 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-...
Howiecamp's user avatar
  • 233
11 votes
4 answers
6k 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 ...
Sergey Snegirev's user avatar
8 votes
5 answers
42k views

Arduino Pro Micro, get data out of Tx pin?

I have a Sparkfun Arduino Pro Micro with an ATmega32u4 on it and a Roving Networks RN32 Bluetooth Module Theoretically, I should be able to solder the Rx of the Bluetooth to the Tx on the arduino and ...
user3320919's user avatar
8 votes
6 answers
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.
Johannes Ernst's user avatar
8 votes
5 answers
54k 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 ...
James Wierzba's user avatar
7 votes
2 answers
2k 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?
Roby Sottini's user avatar
7 votes
5 answers
12k 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 ...
DominicM's user avatar
  • 597
6 votes
1 answer
6k 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 ...
anewsome's user avatar
  • 141
6 votes
2 answers
9k 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, ...
Sonique's user avatar
  • 353
5 votes
6 answers
12k 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 ...
nemewsys's user avatar
  • 215
5 votes
4 answers
3k 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 ...
OlivierV's user avatar
5 votes
2 answers
19k 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 ...
Thomas S.'s user avatar
  • 566
5 votes
3 answers
6k 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 ...
Achindra Bhatnagar's user avatar
5 votes
2 answers
3k 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. ...
Tom Auger's user avatar
  • 193
4 votes
1 answer
1k 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 ...
DividedByZero's user avatar
4 votes
1 answer
59 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 ...
ExtraLars's user avatar
4 votes
1 answer
670 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 ...
pouzzler's user avatar
  • 159
4 votes
1 answer
660 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 ...
Sam W's user avatar
  • 199
4 votes
4 answers
6k 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 ...
FirstTimeUser's user avatar
4 votes
1 answer
212 views

MacBook + BLE Microcontroller Incompatibility?

I've programmed an Adafruit Feather nRF52840 board to send MIDI signals to my computer via BLE. I can confirm that the board pairs successfully with an Android phone and a Windows PC, but my laptop (...
carsoap's user avatar
  • 41
4 votes
0 answers
206 views

How to filter out "jumpy" readings sent using Bluetooth

I'm using App Inventor to continuously send orientation values (as strings) to my Arduino, which are read using Serial.parseInt(). Using simple IF statements (if value > threshold), I'm trying to turn ...
Raed's user avatar
  • 173
3 votes
4 answers
584 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 ...
sundaysfantasy's user avatar
3 votes
1 answer
1k views

What is the difference between Bluetooth module HC-05 and HC-42 for Arduino?

I am looking for differences between HC-05 and HC-42 Bluetooth modules for Arduino. I could not find an answer by searching google. Both products have 6 pins and accept master and slave but I could ...
Devindu's user avatar
  • 41
3 votes
1 answer
119 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.....
Stop Slandering Monica Cellio's user avatar
3 votes
1 answer
311 views

Arduino IDE equivalent to DataView?

I am working on a project with Bluetooth commands between various devices. I would like to try and convert a string to a DataView Object on Arduino, so I can send it over BLE, much like this function ...
NRav's user avatar
  • 225
3 votes
2 answers
5k 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 ...
ShahiM's user avatar
  • 91
3 votes
3 answers
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. ...
sreedevi s's user avatar
3 votes
2 answers
5k views

HC-05 bluetooth module not accepting AT commands

I have been attempting to program my HC-05 ZS-040 Bluetooth module for quite some time, and I cannot get the AT commands to return any values. I have searched google for quite some time, and I none of ...
Justin VanderBerg's user avatar
3 votes
1 answer
8k 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?...
ndueck's user avatar
  • 131
3 votes
2 answers
928 views

How can I stop someone from hacking in to my Arduino via Bluetooth?

I am using an HC-05 bluetooth Module. How can I stop someone from pairing with my device by brute forcing the key? Failing that, and if someone does pair with my device, is there a way to authenticate ...
Lord Loh.'s user avatar
  • 183
3 votes
2 answers
3k views

Upload sketch via Bluetooth using HC-06 module

I'm dealing with an application in which I need to upload sketches remotely to an arduino UNO board. I successufully managed to upload sketches using an HC-06 bluetooth adapter. The only problem is ...
Francesco's user avatar
  • 133
3 votes
3 answers
12k views

How to receive data via Bluetooth on an Arduino 101?

The Arduino 101 came out recently, and it has built-in "Bluetooth Low Energy" capabilities. The tutorials and code examples that can be found for the 101 all seem to be about transmitting data, but I ...
TheIronKnuckle's user avatar
3 votes
1 answer
387 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 ...
zcmckenna's user avatar
3 votes
1 answer
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 ...
Rafael Fragoso's user avatar
3 votes
1 answer
383 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 ...
shafiyyah's user avatar
3 votes
1 answer
2k views

How can I connect an arduino to a raspberry pi via an HC 05 bluetooth module and transmit data?

I am currently undertaking a project where I am attempting to build a bluetooth thermometer using an arduino. I have the temperature sensor working and returning temperature readings via a usb ...
Kyle Auterson's user avatar
3 votes
1 answer
103 views

Do I need an Arduino for BLE?

I have built a prototype that uses RedBear Lab's Blend micro board (http://redbearlab.com/blendmicro/). The board combines Arduino and a BLE chip (Nordic nRF8001). The application is fairly simple ...
SeaSky's user avatar
  • 151
3 votes
3 answers
212 views

Accelerometer IoT

I am not sure if I am in the right place. I would like to build a device (as small as possible) that has an accelerometer and can talk to my phone via bluetooth. Im not asking anyone to build this for ...
KotaBear233's user avatar
3 votes
2 answers
35k 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 ...
user avatar
3 votes
1 answer
570 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 ...
GIPlayer's user avatar
3 votes
1 answer
266 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 ...
sandeep's user avatar
  • 31
3 votes
1 answer
195 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, ...
Black3v3r's user avatar
3 votes
0 answers
321 views

HC05 and ELM327 NODATA sending PID codes

I am working on a project where I am using an HC05 connected to an Arduino to connect to an ELM327 Bluetooth scanner. I am using the SoftwareSerial Arduino library to send and read information from ...
Fletcher Dares's user avatar
3 votes
0 answers
703 views

ESP32 Bluetooth Master does not connect

I want to connect an ESP32 to a SMA Sunny Boy SB5000-TL Solar convertor over Bluetooth, but I cannot establish a connection and I'm kind of stuck. I use the internal bluetooth module of the ESP32. ...
mvermand's user avatar
  • 407
3 votes
0 answers
1k 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) ...
Kunal Kataria's user avatar
3 votes
0 answers
216 views

Scheduling and BLE Read on demand

I'm building a data logging device with BLE capability using RFduino. Sensors are read using timer interrupt to a buffer. When the buffer is full, then the whole buffer is written to SD card. At the ...
Dzung Nguyen's user avatar
3 votes
2 answers
692 views

Bluetooth communication not working with DC power but works with USB power?

I am running an HM-10 Bluetooth Low Energy (BLE) module to transmit serial data (using SoftwareSerial) from an analog sensor onboard my Arduino Uno to a serial terminal app on my Android phone. When I ...
AggroCrag's user avatar
  • 151
3 votes
0 answers
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 ...
Nick's user avatar
  • 31
3 votes
1 answer
2k 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 ...
Alex Wulff's user avatar

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