Arduino Stack Exchange
Arduino Stack Exchange

Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

Bluetooth is a wireless communication standard which uses ultra-high frequency (UHF) radio waves. Line-of-sight between the devices is not required, although it is only intended for exchanging data over fairly short distances, such as between a mobile phone and a headset.

Built-in Bluetooth support is available on the official Arduino BT board, and in various Arduino compatible development boards from third party manufacturers. Alternatively, Bluetooth support can be added to other Arduino boards through the use of a shield or generic components.

This tag should be used for questions about using Bluetooth with Arduino.

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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 prototype to talk to a mobile device or a computer to…
Phil
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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…
Howiecamp
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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 players) to be wireless. Since the best quiz players…
Brian G.
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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
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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 varying from 0.1 to 1.0 meters per second. From…
James Wierzba
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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 vice versa and I should get serial communication…
user3320919
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Why is there a plastic sleeve on my HC-05 bluetooth module

I would like want to know why the bluetooth module has a plastic sleeve covering it? Is it possible to remove it?
Roby Sottini
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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 serial output appearing on arduino serial console via…
DominicM
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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 actually code. The thread is here: Want to create…
anewsome
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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, expensive (based on rn-42, also available RN-42-EK…
Sonique
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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 (MacBook Pro 2021) will not recognize the board; it…
carsoap
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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 it? My project consists of an Arduino that will…
nemewsys
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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 the same problem with them all. The Bluetooth…
Achindra Bhatnagar
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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. In my scenario I have a BLE sensor that is not…
Tom Auger
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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 dongle (with added serial connection) on my…
Thomas S.
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