Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

Filter by
Sorted by
Tagged with
0
votes
0answers
18 views

Arduino-compatible Bluetooth classic module to use in a product

I've been designing a product for some time using arduino language, but on our own hardware. Recently a need arose to add some Bluetooth capability to our product. We decided to use BT classic instead ...
1
vote
1answer
22 views

Which board to use for wireless communication of small packages? [closed]

I was hoping to get your advice on what Arduino boards to look at for a project I'm working on. The project involves two separate boxes in different rooms of my apartment (~ 5-10 feet away from each ...
2
votes
1answer
93 views

Digital Input using a button doesn't work properly when using it to control a relay

I'm trying to control a relay both via Bluetooth and using a switch. The problem is that, when the LED is off, I can turn it on with the switch but then if I turn off the switch the relay will stay on....
0
votes
1answer
1k views

Badly formatted characters using JDY-30 bluetooth module

I have a JDY-30 bluetooth module and have it wired like this (except using an Arduino Uno): It is working, but I need to use it with a 115200 baud rate instead of the default one of 9600. I also got ...
0
votes
1answer
46 views

Why my 4WD Bluetooth car run so slow

Code /*Arduino Bluetooth Controlled Car * * Created by Glen Tech * https://www.youtube.com/glentech */ #include <AFMotor.h> //initial motors pin AF_DCMotor motor1(1); AF_DCMotor motor2(...
-1
votes
1answer
35 views

HM-10 doesn't responde after RENEW

Today I finally got two HM-10 modules. I did flash firmware using this tutorial. It worked until I didn't send AT+RENEW command. Now, LED blinks, I see device in BT terminal(Android phone) but I can't ...
0
votes
1answer
43 views

How to make BLE data accessible to a particular app?

I used the BLE example from here. But any device can read and write to the advertised characteristic. Is there a way to make the data inaccessible to other devices except for my app somehow. What I ...
0
votes
1answer
105 views

How to connect ESP32 to HC-06?

I am making a small project (BT controlled "tank") and need to connect ESP32 with HC-06 (ESP32 will be in controller and HC-06 in the vehicle). Android phone communication with both ESP and HC-06 ...
0
votes
1answer
102 views

Can I make the BT module disconnect with a BT module and connect with another in the code?

I am working on a project that requires a connection between two BT modules (HC-05) and a mobile phone. Later on, I encountered a problem: I can't connect two BT modules to one at the same time, So I ...
0
votes
1answer
40 views

How to connect HC-06 BT module without pins?

So, from one popular Chinese store I ordered a HC-06 module that I received... and due to some mistake from a store, I received a HC-06 without connecting pins. So usually HC-06 looks like this (with ...
-1
votes
0answers
43 views

FSC-BT625 Bluetooth module (one Master - 10 Slave) with Arduino

I have a project that has #10 slave bluetooth modules. Each of them reads a value by adc and sends it to bluetooth master #. Please explain to me how this is possible. I read somewhere that this is ...
0
votes
1answer
50 views

Nothing gets sent to Arduino from Processing

I have a problem where I kwow that my bluetooth module (HC-05) is connected to a processing sketch, but nothing ever gets sent from the processing sketch,why? No error messages but the info never ...
0
votes
1answer
514 views

How to send big data (long string) from PC to Arduino using Bluetooth

One of the requirements of my projects is to send data from my application to the Arduino robot. I have windows 10, and my robot is Arduino Uno. The Bluetooth I'm using on my robot is HC-06. The app ...
0
votes
0answers
34 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) ...
-1
votes
2answers
6k views

HC-05 Bluetooth module doesn't read data correctly from my Android phone

I have made a home automation project where am using an Arduino Uno and HC-05 Bluetooth module and an Android app. I did everything properly but when I send commands from my Android app it works ...
0
votes
0answers
26 views

How to quit flash mode on HM-10?

I have an HM-10 BLE module connected to Arduino Leonardo. It forwards UART from my computer: #define btSerial Serial1 void setup() { Serial.begin(9600); while (!Serial) { delay(50); ...
0
votes
0answers
22 views

Alternatives to hc05?

Are there any alternatives to hc05 that are smaller than the hc05 i am making a project and i require a bluetooth module that works like the hc05 but has to much smaller
0
votes
0answers
21 views

Record stereo audio from two Bluetooth headsets

I've been playing with Arduino for a few years, but I'm new to Bluetooth and streaming audio. I'd like to develop (or assemble or buy) a device for recording stereo audio from a pair of Bluetooth ...
0
votes
0answers
30 views

Long range wireless RC airplane control

I pretty new to Arduino and I need help to clarify some things. First, I want to make an Arduino controlled RC airplane but I don't know what communication module to use. I did some research and ...
0
votes
0answers
15 views

Bluetooth not discoverable using feather nRF52832

I just bought a feather nRF52 but I can't make the Bluetooth LE work ... I followed to tutorial (https://learn.adafruit.com/bluefruit-nr ... troduction) which features the same information that on the ...
0
votes
1answer
57 views

json format in esp32 with arduino json

I am using an ESP32 module for bluetooth connection and scaning wifi network. But I cannot format the json using arduinojson library in the way I want. void scanWifiNetworks() { //creating json ...
0
votes
1answer
4k views

Arduino Bluetooth and Ultrasonic Distance Sensor (HC-SR04): printing values over BT gives error

I'm trying to send the reading distance of an HC-SR04 sensor to an Android app, using Bluetooth. I succesfully managed to send values from many other sensor to the app, but when it comes to sending ...
0
votes
1answer
23 views

The problem of not saving the previous value when sending it from bluetooth

Controlling Led's from Buttons and Bluetooth by same method The problem now : the LED light up when you send an A over Bluetooth and it will turn off after 2 sec automatically without you doing ...
0
votes
1answer
218 views

RN4678 Bluetooth doesn't respond

I am facing very basic level issue with RN4678. I purchased a module from https://www.mikroe.com/rn4678-click I want to simply communicate with it through serial port. To do that I connected it to ...
4
votes
3answers
16k 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-...
0
votes
0answers
108 views

Serial Buffer receives ghost character

I am using an HC-05 bluetooth module which is connected to an app made in Unity on my phone. For the example case, the app is sending "f!" over bluetooth. The arduino then reads the string until it ...
0
votes
4answers
9k views

How to solve problem AT+INQ ERROR (1F), AT+INIT ERROR(17) on Bluetooth Module HC-05?

i have problem with accessing at-command in module Bluetooh HC-05. i just follow all tutorial to activate at-command like this, http://www.martyncurrey.com/arduino-with-hc-05-bluetooth-module-in-...
0
votes
1answer
80 views

i can't work toggle for my small project

i build my small project from a few component as this photo after finish code and project . i work run for Proteus and then the project not run perfectly because my code need toggle for data entered . ...
0
votes
1answer
28 views

using multiple hc-05 with one arduino mega [closed]

please anyone help me build my project, i want to connect multiple smart phones to arduino mega using blutooth module hc-05 , I am working on real life home automation project and i don't have idea ...
1
vote
1answer
35 views

My millis() code doesn't work

I am doing a project with bluetooth and an LED. I wrote a code which supposed to turn on an LED after it receives a byte of value 1 after 5 seconds, unless it receive another byte of value 1 (which ...
-1
votes
6answers
3k views

Problems with serial communication from Arduino to Bluetooth HC-05

I just purchased some HC-05 Bluetooth devices and I have followed the directions to put the devices in AT command mode by holding EN HIGH when the HC-05 powers up. When I do this the HC-05 goes into ...
0
votes
2answers
56 views

I want to send the last 10 minute data via bluetooth

This was for photocell data logging for 30 sec intervals, now I want to write a code which commands from the cellphone and sends back the last 10 minute data. at first I thought if I make an array of ...
1
vote
1answer
57 views

Convert Arduino MEGA Code to Arduino DUE Code?

I've been working with MEGA before. This code works completely with MEGA. I'm still at beginner level in Arduino. Q: How do I adapt this code to DUE? Note: I'm asking this question because I think ...
0
votes
0answers
14 views

I want to code a countdown code that resets periodically for arduino [duplicate]

i am looking forward to do my first arduino project, but I'm a little stuck on the coding. I want to make an alarm that turns on when it is disconnected from bluetooth of smartphone. My idea on how ...
0
votes
0answers
919 views

Bluetooth Module AT command error?

I am trying to get my Arduino UNO to communicate with a Bluetooth Module (Bluetooth Bee), but I am getting a weird behaviour from the device. First, there are no leds blinking on the board (which I ...
0
votes
0answers
12 views

Using two input methods to control one motor shield (bluetooth and pushbuttons)

since an Arduino cannot run two programs simultaneously, I have been struggling a lot to get my project working - basically it is a motorized desk which is supposed to take input either from a BLE ...
0
votes
0answers
48 views

How to connect Arduino and Android phone using JDY-19 (BLE) module?

I am stuck with the JDY-19 BLE module. The BLE module is master and I can't find any AT commands to make it a slave. After searching I came to know that JDY-19 master and slave firmwares are different....
0
votes
1answer
31 views

Problem with HC-06 receiving data

I have paired 2 BT modules HC-05 and HC-06. When I write something through Serial Monitor and send it from HC-05 to HC-06, everything works well. But when I send continuous data through loop, HC-06 ...
1
vote
0answers
1k views

HC05 to HC05 Handshake Communication

I am attempting to connect an Arduino Uno to a Modern Device RBB Arduino. One is the base and the other the remote. They need to set up a simple handshake to communicate an on and off condition from ...
-1
votes
3answers
609 views

Unable to get response for BLE AT commands in Arduino Uno

I am trying to establish connection between two BLE (BT43) through AT commands from an Arduino Uno. I am not getting any response from the AT commands. The connections are as follows: Arduino Tx --> ...
-1
votes
1answer
1k views

Using BLE Nano with LSM9DS1

I'm trying to use the BLE Nano to connect to a LSM9DS1 IMU. However when I am able to connect to the IMU, the values the Nano outputs do not update and do not seem to make sense. I am able to ...
0
votes
0answers
13 views

Bolutek HM10-clone: CC41 state pin is blinking

Dear fellow arduino users, while working with cheap clones of the infamous HM10 (CC41, I believe), I've stumbled onto some weird behaviour: The pin "STATE", that is supposed to display the connection ...
-1
votes
1answer
211 views

My HC-05 Bluetooth Module is not working

I have been trying to use the HC-05 Module with my Arduino Uno to control a LED, which can be turned on and off by my phone. Everything is fine when i input the values from the serial monitor. The ...
0
votes
2answers
955 views

Arduino Bluetooth Range Control

I am creating a project that uses Bluetooth, But unfortunately it requires some kind of control of the range. I was thinking a potentiometer controlling the power going to the transmitters antenna. ...
-1
votes
1answer
50 views

Get data from Bluetooth scale

I am trying to get data from this type of scale https://acaia.co/products/pearl. It does not show up under discover-able Bluetooth devices on a computer or phone, but it does have an app which it ...
0
votes
1answer
1k views

How to connect mini jack output to arduino mini pro and send sound to it?

I would like to connect arduino mini pro to mini jack output and send sound through it. What would I need here, how can I connect the mini jack to arduino and how to send data of sounds (any library?)...
0
votes
1answer
684 views

Bluesmirf Mate Silver (RN-42) enter command mode when in HID mode

I am having problems getting the Bluesmirf Mate Silver (RN-42) into command mode once I have switched to HID mode. I have bought a second new Bluesmirf Mate Silver to confirm my issue. I soldered the ...
1
vote
1answer
479 views

Adafruit Feather 32u4 Bluefruit LE and HC-05 Bluetooth module

Is it possible to connect an Adafruit Feather 32u4 Bluefruit LE with an HC-05 Bluetooth module? I am making a heart rate monitor using an Adafruit Feather, but it is unable to send the data to ...
0
votes
1answer
585 views

Writing data from multiple sensors in burst mode to an Arduino Due

I need help developing a simple sketch that can read data simultaneously from 3 analog accelerometers and send it in 'burst mode' to be stored on an SD card, to reduce the effect of latency. I used ...
0
votes
0answers
33 views

ASCII and hex bluetooth car

Hi I am trying to send numbers to my arduino car to make it drive. But if I send it a value I get some hex value back I believe. If I send empty text via CoolTerm i get " m j " back to my terminal #...

1 2 3 4 5 11