Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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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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14 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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39 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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25 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 ...
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35 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 ...
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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(...
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43 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 ...
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44 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 ...
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37 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) ...
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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); ...
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24 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
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22 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 ...
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32 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 ...
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16 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 ...
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1answer
116 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 ...
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59 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 ...
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1answer
44 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 ...
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109 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 ...
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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 ...
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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 ...
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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 . ...
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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 ...
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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 ...
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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 ...
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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 ...
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49 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....
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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 ...
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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 #...
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58 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 ...
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1answer
35 views

integer overflow in expression [-Woverflow] - TinyCircuit

I have a tiny circuit Bluetooth shield and I was testing out the sample code that was provided by tinycircuit. However, when I tried uploading the sample code into the board, I kept having the ...
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25 views

Any source code for connecting a tinyshield to another tinyshield?

I recently purchase 2 tinycircuit smart watch. I am wondering if anyone knows if there is any source code for me to reference on how do I connect one tinyshield to another tinyshield. I understand ...
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24 views

Bluetooth and 434 MHz RF transmission

Can we connect both Bluetooth and 434MHZ transmitter to one Arduino-UNO? The purpose for me is to send a message from an android phone and I want the transmitter on that Arduino to send the same ...
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2answers
36 views

HC06 correct baud rate but missing characters/ no AT commands

I have an issue with the communication between my Serial Monitor and my BT HC06 Module. Iam able to send ascii characters from my phone with BT connection to my local serial monitor. When i send ...
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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 ...
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69 views

Bluetooth toggle between two master device (Using UART)

we are currently using a BLE Tiny Circuit broad with UART codes. Is it possible to allow two master to connect to the circuit board and the circuit board will be able to transmit data to both ...
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1answer
69 views

HC-05 can not use lower pins only 8 and higher

#include <Arduino.h> #include <SoftwareSerial.h> char Incoming_value = 0; // SoftwareSerial BTSerial( 10, 11 ); // RX | TX + // SoftwareSerial BTSerial( 9, 10 ); // RX | TX + // ...
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17 views

Can the PN532 pull MAC address from Felica tags?

I'm trying to do an automatic pairing with Felica NFC tags but I need the MAC address because there is a certain order I would like sync up my device in order when I scan it to the NFC. To get it to ...
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330 views

Please help! My Bluetooth Controlled Car Isn't working

I followed this tutorial: enter link description here I built it according to the schematic except I didn't connect an LED (I assume this isn't the problem). This is the schematic: I'm a beginner so ...
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35 views

Help with turning LED on using smartphone with HC-05

I followed this tutorial: Remote Controlled LED using HC-05 I've assembled everything, uploaded the code and connected it with my phone. The code: /* Arduino Turn LED On/Off using Serial Commands ...
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53 views

communication between two HC 05 Bluetooth module

i am trying to transfer data between two HC-05 modules one is master and another is slave, slave is receiving data successfully but after sometime about 12-13 seconds it starts garbage values and ...
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23 views

Bluetooth module with HID and state

I'm looking for a bluetooth module that support HID and can send strings and "hex buttons" to a Win 10 computer. It also needs a state pin or have a library that knows if the module is connected to ...
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1answer
395 views

Arduino Nano 33 IOT - Bluetooth Classic (Serial)

I've an arduino nano 33 iot and I'm working with the first time with bluetooth. So far BLE is working fine, I can use an app on my smartphone to check the services and characteristics. Is it possible ...
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23 views

Lg g6 can't find Esp32 bluetooth

My lg g6 cant find esp32's bluetooth. Lg g6 bluetooth is fine as i can connect other devices Esp32's bluetooth is fine as i can connec from my samsung s9 to the esp32. Tried reseting and clearing ...
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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 ...
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1answer
537 views

Sending Integer > 1 Byte from Android to Arduino over Serial

I´m using public abstract void write(int b) throws IOException; from class OutputStream on Android Studio to sent Integer (degrees from 0 to 360) to the Serial Port of my Arduino over HC06 ...
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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 ...
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25 views

How do I get my servo to turn using bluetooth, is this a glitch?

I'm very new to coding with arduino so please excuse my naivety, For an electronics assignment I am making a servo turn back and forth using a HM10 BLE however each time I press a button that sends '0'...
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251 views

Control speed of a dc motor with a 9v battery [closed]

Problem: I want to have a 9v battery that powers a dc motor. I want to control it with a bluetooth remote that has 3 buttons. 1st button is turn the motor with 1.5v, 2nd button is motor off and the ...
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20 views

Cannot make sense of values from Bluetooth HC-01

I have a simple script that listens on pin 0 for input, and if it gets anything, it Serial.prints it. But I cannot make sense of the results. I have a basic app that sends text over Bluetooth (in the ...
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47 views

Adding bootloader to Feather M0 Bluefruit LE

I want to make a custom Feather M0 Bluefruit LE. I know this means that I will have to add a bootloader to the ATSAMD21G18. I have seen that there are many useful articles in relation to adding ...

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