Questions tagged [hc-05]

Refer to the HC-05 Bluetooth module.

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servo retaining its position everytime i send some value

i wanted to control my servo with bluetooth modue. I gave certain values for rotating it. but when i press those values the servo rotates but then retains it's original position and pc pc also make ...
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15 views

Can't pair two HC-05 (Master - Slave)

I want to connect two HC-05 modules, one master and one slave. So to that I need to access 'AT Commands'. Theoretically, I just needed to upload an empty code, and then connect the module to the ...
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OV2640 Image Transfer via Bluetooth

I am working with the Arducam OV2640 Camera Module 2MP Mini, an Arduino Mega 2560 R3, and the HC-05 Bluetooth Module. My goal is to take pictures with the camera module, and transfer them over ...
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Bluetooth HC-05 only takes one command and then disconnects

I'ma total noob at Arduino and this is my first project. It is a Bluetooth controlled RC car. As you can understand fon the title, my hc-05 takes only takes only one command and then disconnects ...
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97 views

HC-05 Bluetooth module; two serial ports, COM4 and COM5

I'm learning how to use the Arduino HC-05 Bluetooth module. After pairing to it with my laptop I saw that I was getting two serial links, COM4 and COM5, as can be seen from the picture below. On COM4 ...
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50 views

Bluetooth Upload is Hanging

I am trying to program my Arduino via bluetooth and have been following this tutorial very closely in order to do so: https://www.instructables.com/Program-an-Arduino-Wireless-Over-Bluetooth/ I have ...
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ESP8266 with HC05 : expecting to receive more bytes then the 63 received

I'm trying to read a Ant BMS 32H with a ESP8266 and a HC05 module. BMS is sending 146 bytes when asking for these by sending DB DB 0 0 0 0 (HEX) I did test with my android phone and the app 'Serial ...
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1 answer
110 views

Can’t send string from arduino to processing via hc05

I’m trying to send and receive data from my laptop to arduino nano via hc05 Bluetooth for a rocket flight computer. For some reasons which I don’t know, I can send data from processing software using ...
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77 views

HC-05 bluetooth module stops working when blinking

I'm using this HC-05 Bluetooth module to communicate between my Arduino mega 2560 and my laptop. I am using processing to send the data from my computer to the Arduino. The module connects nicely and ...
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271 views

Bluetooth module with lowest latency to communicate with PC

I am making a haptic feedback glove using Arduino and HC-05 bluetooth module to communicate with PC. There are rotary encoders on the finger which send value to PC through Arduino mega. The PC returns ...
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How to switch HC-05 from DATA mode to AT mode?

I am asking how to enter from the data mode to the AT command mode without restarting and disconnecting any power supply. In other words, I am trying to make a driver to handle HC-05 module and now I ...
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77 views

AT+IPSCAN HC-05 Command

I have a HC-05 module, directly connected to an STM32 via UART interface and connected simultaneously to a mobile application in order to exchange real time data. I am trying to reduce the power ...
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67 views

Bluetooth module not working

I was following a tutorial on YouTube to build a Bluetooth car with Arduino. #include <AFMotor.h> //initial motors pin AF_DCMotor motor1(1, MOTOR12_1KHZ); AF_DCMotor motor4(4, MOTOR34_1KHZ); ...
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1 vote
0 answers
175 views

HC-05 bluetooth module short range

I have started learning about arduino and just bought a bluetooth module, HC-05. From where i bought, it says it has range of approx.10 meters. I made hc-05 connection with arduino in below described ...
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1 vote
2 answers
89 views

I need a good battery reccomendation

I have simple project composed of an Arduino Nano, a HC-05 module, and a small toy DC motor controlled using a L293D driver, I want to be able to power this circuit entirely using a battery, here is ...
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2 votes
1 answer
128 views

HC-05 drops connection, then DC Motors won't stop moving 'forward'

This is my first post. I seek you guys' help with my problem. Basically, my project is a Mobile-App Bluetooth Controlled WheelChair. Everything's done except a minor problem comes out during testing. ...
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1 vote
1 answer
1k views

HC-05 Module not receiving commands and not pairing

I'm working on a project where I'll need to establish a connection between two HC-05 modules, each connected to an Arduino, but for now I'm just trying to get one to work and connect to my phone, but ...
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1 answer
369 views

Does HC-05 module buffers the data received?

I am using HC-05 bluetooth module for sending large data(80-100KByte) from my phone to arduino-uno. I had found that this module has a flash chip of 8Mbit (SST39VF800A) but the datasheet of HC-05 has ...
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1 vote
0 answers
121 views

Can I Control My Android Game with Arduino Gamepad

I have a project that I need to make a game(guitar hero like rhythm game) on unity for android and develop a custom controller for it that works on mobile game. I decide to use Arduino and hc05 module ...
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1 vote
0 answers
167 views

Not Receiving HC-05 data

I've been trying to use this HC-05 bluetooth module for a project, where the data would be sent to a Max/MSP/jitter program. Initially, every time I connected my bluetooth device to my computer, it ...
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Use HC05 and FTDI as Slave to Connect to control PC using HC05

Hi i just wanna ask if its possible to do this on HC05. So i can send some keyboard function? and if yes can you tell me how. Thanks
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40 views

Cannot detect Bluetooth device when connected to female receiver with PS4 Joystick

I am trying to connect the Bluetooth transmitter to a female receiver via an Arduino Uno. The button blinks, but the Bluetooth is not visible in any device. i want to connect PS4 controller using HC05 ...
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63 views

HC-05 voltage divider

I am currently testing a small Arduino Nano project (schematic below) and have encountered issues when communicating between a HC-05 Bluetooth module and the Arduino. I am using a simple LED bulb ...
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1 answer
192 views

Arduino with HC-05 Bluetooth Module | No data will be transmitted

I've got an Arduino Uno (Elegoo R3) and a Hc-05 bluetooth module. First of all i want to send data with an android app (Bluetooth terminal) to the Arduino and turn pin 13 (LED) on. My Arduino code: #...
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2 votes
1 answer
39 views

Movement and storage of servo positions via bluetooth

I am trying to program a 4DOF robotic arm (using 4 servo motors). I would like to move the servos using an Android app, by means of bluetooth (HC-05). I developed the app, in whose interface there are ...
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0 answers
21 views

What do i do to get my bluetooth module to light up?

I'm very new to arduino and am doing my first project, a bluetooth run robot. When i plugged in my module to my laptop to upload the code, the module lights up, and afterwards, i was able to run it on ...
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2 answers
111 views

Hc-05 bluetooth module pairing issue

Module light is blinking/working but it's not showing for pairing in my smart phone.I have supplied it 3.3 volts and have tried different phones.
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1 vote
2 answers
320 views

How to fix HC05 burning even after while using voltage regulator?

I'm using two circuits for my wireless head mouse project, one of them is a transmitter circuit with Arduino Pro Micro, HC05 Bluetooth module, Elechouse Voice Recognition Module V3.1, GY-521 module ...
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2 answers
992 views

Bluetooth module vs wireless module Arduino

My main question is, what is the main difference between HC-05 Bluetooth module and NRF24L0 wireless module? Which should I buy? Which makes these 2 modules different than each other? Which one should ...
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1 answer
274 views

Will Setting Interrupt Pin High Damage Bluetooth Module?

I want my HC05 Bluetooth Module to trigger an interrupt when it receives a signal. So I've followed suggestions from the Arduino Forum and connected the Bluetooth TXD pin to the Arduino RX Pin and the ...
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1 answer
264 views

Failed HC-05 Bluetooth sketch upload - (port and board correct)

I'm running this project with HC-05 https://create.arduino.cc/projecthub/millerman4487/view-serial-monitor-over-bluetooth-fbb0e5 and I am getting connection error. I have ensured my port selected and ...
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2 votes
1 answer
532 views

HC-05 will NOT pair in Master mode (AT+ROLE=1). Same module will pair in slave mode (AT+ROLE=0)

I have a HC-05 Bluetooth module Version (+VERSION:2.0-20100601). I am using Linux Mint Rosa on an Acer laptop Section 1 - How it's wired Wiring HC-05 Arduino VCC 5V GND GND TX ...
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1 vote
1 answer
271 views

How to send and receive multiple integer values through serial comm for Arduino Micro and HC05 bluetooth?

I need to send gyroscope values and a voice command flag and counter with a start and end marker through serial in the format <2,4,5,6> through Arduino Software serial using the HC05 Bluetooth ...
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1 vote
0 answers
181 views

Gamepad connection using Pro Micro(ATMEGA32u4 + HC-05

I have been working on making a HID compatible Gamepad using Pro Micro and HC-05 module. I have successfully configured the class of HC-05 module to appear as an Input device(A gamepad) on my PC ...
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-1 votes
3 answers
293 views

sensitive distance detection using 2 HC-05 module/ 2 arduino unos

Hi I am doing a project in which I use 2 HC-05 modules and 2 arduino unos driving them. 1 bluetooth module is master and the other is slave. Master module is stationary while slave is moving. If the ...
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1 vote
0 answers
56 views

Is it possible using a hc-05 bluetooth module as master and pair it to a hc-06 module?

I have configured a hc-05 bluetooth module as master and a hc-06 module as slave an since the LED on the hc-05 is blinking in a 2s delay they should be paired but no matter what I do I can't send data ...
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0 votes
1 answer
62 views

Can Bluetooth HC-05 Module detect other modules and relay data back to phone?

I want the following to happen: The HC-05 is paired to a phone. The module is called "Amy". The module is worn, say, as a wristband by a person. Amy passes another wristband-with-HC-05-...
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-1 votes
1 answer
282 views

Motor cutting out when using HC-05 Bluetooth module

I'm using an L293D motor driver chip along with an HC-05 Bluetooth module. The two work as expected separately - I can send a string via a Bluetooth terminal app on my phone to the HC-05 and I see it ...
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1 vote
1 answer
134 views

HC-05 Stuck in slave loop mode (loopback)

got my HC-05 today and accidently set the AT+ROLE=2(slave loop) and now I can't get out of it! Anything I send it just resends it back to me, even commands like AT+RESET and AT+ORGL, they just get ...
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0 votes
2 answers
101 views

Long term stability of bluetooth connections

I have two Arduino Megas with HC-05 on Serial1 connected to a Raspberry Pi 3b+ via bluetooth, using the HC-05 and the RPi's built-in bluetooth, and python's pySerialTransfer library to make the ...
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2 answers
323 views

Hardware/software serial for HC-05

can anyone please tell me the whole difference between hardware and software serial for the HC-05. I read UART,USB cable, serial and I was like really confused so what is the difference and advantages ...
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1 answer
194 views

Reset HC-05 from within Arduino sketch

I have an HC-05 Bluetooth module attached to an Arduino Mega; the module is paired with a Raspberry Pi and fed data via a python program; there's roughly one send and one receive per second of about ...
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1 vote
0 answers
66 views

How to use HC-05 to recieve data?

I am trying to control an led with a bluetooth module, but it is not working with an if else condition. When I use this code I found on the internet the led blinks when I send the string from an ...
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1 vote
0 answers
113 views

Bluetooth module HC05 does not react to bluetooth signal from smartphone

I try to switch off two leds with a hc05 module by sending the signal from my phone. I know there are a lot of examples on the internet and I tried some of them, but they dont work either. I use a ...
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0 votes
1 answer
494 views

Arduino bluetooth HC-05 data reading problem

I have a problem with bluetooth module HC-05 and servos. If I type in bluetooth terminal 4,1 I want that servo1 turns 60 degrees 3 times. Briefly servo1 turns 60 degrees and then servo2 goes 180 and ...
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  • 1
0 votes
1 answer
158 views

Arduino bluetooth HC-05 servo control

I am using HC-05 Bluetooth module to control two servos. I use Bluetooth terminal in my android phone to control them. Problem is that myServo1 is moving like I want but I can't control myServo2. ...
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2 votes
2 answers
242 views

How do I make a proper long string scanner to detect specific tags in a stream of characters?

Here's my code: #include <SoftwareSerial.h> SoftwareSerial BTserial(2, 3); // RX, TX void setup() { Serial.begin(9600); BTserial.begin(9600); Serial.println("Communication with HC-...
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-1 votes
1 answer
65 views

First time working with arduino, need help adapting project from UNO to NANO

This is my first time working with an arduino and I'm having some issues when trying to copy a program I found online on my Nano. Basically, my project consists in a pulse sensor that sends the pulse ...
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1 vote
0 answers
60 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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1 vote
0 answers
61 views

NodeMCU hc05 Connection

I am using a NodeMCU from Amica. I tried interfacing the HC-05 module to the NodeMCU. The following code works fine without any errors #include<SoftwareSerial.h> SoftwareSerial btport(D2, D3);...
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