Questions tagged [hc-05]

Refer to the HC-05 Bluetooth module.

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Control esp32 via keyboard keys

I'm making a project in which I have to control a mini car and get sensor information via bluetooth. I'd like to be able to control the mini car with the computers keyboard (w,a,s,d), but I was not ...
Matrodsilver's user avatar
3 votes
0 answers
206 views

Problem with reading data from ELM327

The idea was to create a bluetooth device on the arduino to read data from the machine (ELM327 v2.1) using the HC-05 bluetooth module. In this code the bluetooth module is switched to MASTER mode and ...
gfd2's user avatar
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2 votes
1 answer
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How do I make the Arduino print on my Mac's Arduino IDE through Bluetooth?

This is a basic question, but I really have tried my best to find a solution on the internet to no avail. I have a fairly normal setup. HC05 module connected to an Arduino. The HC05 is also connected ...
iceninja21's user avatar
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90 views

HC-05 Disconnects Underwater(predictably). How to make it reconnect by itself?

So I have an application where I send a Bluetooth module underwater(in a waterproof case). I have the Arduino+module sending my computer on-land a constant stream of numbers. Predictably, when the ...
iceninja21's user avatar
3 votes
0 answers
245 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
1 vote
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115 views

Communication between two hc 05 Bluetooth modules not working

I Have a problem with the connection between two hc 05 modules. The bluetooth modules are paired using AT commands. But when I run the code I cant get any data from the reciever. The bluetooth modules ...
Lisitha Ranukkanda's user avatar
1 vote
1 answer
921 views

Arduino + HC-05 Problem: AT Commands are not working

Device: Laptop, HC-05, Resistor 2.2k and 4.7k, Arduino Uno R3 So im trying to rename and change password of my HC-05. for full detail schematic diagram. Here(the difference is, i also used the STATE ...
FaizTact's user avatar
-1 votes
1 answer
89 views

Constantly Stream data vía Bluetooth to monitoring

I am using a Bluetooth module HC-05 to Stream data from Arduino to My computer. In they computer I am using a python script to receive They specifications: Baud rate: 9600 But I am getting an error. ...
Elí Flores's user avatar
-1 votes
1 answer
41 views

Servo retaining its position every time I send some value

I wanted to control my servo with a Bluetooth module. I gave certain values for rotating it. When I press those values the servo rotates, but then retains its original position and the PC also makes ...
Rathore Brothers's user avatar
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59 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 ...
Bikke21's user avatar
2 votes
1 answer
337 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 ...
Kennerdol's user avatar
1 vote
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127 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 ...
Alex88's user avatar
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1 vote
1 answer
150 views

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 ...
Bart De Pauw's user avatar
1 vote
1 answer
247 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 ...
Brandy's user avatar
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2 votes
0 answers
233 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 ...
Sahibjot Singh's user avatar
1 vote
0 answers
741 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 ...
cakh's user avatar
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1 answer
409 views

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 ...
falcon_977's user avatar
1 vote
0 answers
128 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 ...
falcon_977's user avatar
1 vote
0 answers
174 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); ...
adham's user avatar
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342 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 ...
usmandroid's user avatar
1 vote
2 answers
162 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 ...
The Riser's user avatar
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2 votes
1 answer
231 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. ...
Peace You's user avatar
1 vote
1 answer
2k 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 ...
The Riser's user avatar
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777 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 ...
Gamma Ray's user avatar
1 vote
0 answers
192 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 ...
Levent Kaya's user avatar
1 vote
0 answers
279 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 ...
Julia's user avatar
  • 11
1 vote
0 answers
137 views

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
Jonathan Agravante's user avatar
1 vote
0 answers
53 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 ...
Karan's user avatar
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1 vote
0 answers
130 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 ...
Paco's user avatar
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1 vote
1 answer
475 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: #...
Verilyzed's user avatar
2 votes
1 answer
58 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 ...
Giammarco's user avatar
1 vote
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 ...
user69837's user avatar
-1 votes
2 answers
296 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.
Hassan Akram's user avatar
1 vote
2 answers
713 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 ...
Nahian Rifaat's user avatar
1 vote
2 answers
2k 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 ...
Subha Jeet Sikdar's user avatar
0 votes
1 answer
375 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 ...
I Like's user avatar
  • 205
1 vote
1 answer
441 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 ...
user avatar
1 vote
2 answers
1k 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 ...
user287529's user avatar
1 vote
1 answer
342 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 ...
Nahian Rifaat's user avatar
1 vote
0 answers
377 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 ...
REVOLUTION's user avatar
-1 votes
3 answers
554 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 ...
EEstudent's user avatar
1 vote
0 answers
88 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 ...
Dennis L's user avatar
0 votes
1 answer
158 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-...
Hari5000's user avatar
  • 125
-1 votes
1 answer
577 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 ...
javathunderman's user avatar
1 vote
1 answer
271 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 ...
Sultan Hassanieh's user avatar
0 votes
2 answers
152 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 ...
David W's user avatar
  • 39
1 vote
2 answers
488 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 ...
klay's user avatar
  • 43
0 votes
1 answer
627 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 ...
David W's user avatar
  • 39
1 vote
0 answers
138 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 ...
user avatar
1 vote
0 answers
238 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 ...
user65152's user avatar