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Questions tagged [hc-05]

Refer to the HC-05 Bluetooth module.

1
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1answer
47 views

Arduino Power Consumption

I am pairing an Arduino Uno along with both a HC-05 bluetooth module and a sensor circuit. Show below is the circuit conditions as well as the circuit. As far as powering up the system, I am ...
0
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1answer
37 views

mySerial.available() is returning 0

I am using bluetooth hc-05, arduino uno and ap app created by mit app inventor.The problem is myserial.available is returning 0 and hence its loop is not getting executed. I had connected four pins of ...
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0answers
29 views

Android phone and “generic” HC-05

I have some questions about using my Android phone to send/receive characters from what I will call a "generic" HC-05 setup. I have two devices I built many years ago using the ATmega chip family but ...
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1answer
27 views

Reading values with HC-05 and sending commands at the same time working inconsistently

Not good at coding at all, so I'm at a total loss here. But I'm doing a project that involves controlling a larger DC voltage through a mosfet. What I'm doing is I'm using a HC-05 to transmit data ...
0
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1answer
26 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 ...
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0answers
18 views

DC motors don't stop

I'm trying to control a bluetooth car. This is my code : #include <SoftwareSerial.h> SoftwareSerial BTSerial(0, 1); // RX | TX int backFront = 3; int backBack = 2; int frontLeft = 5; int ...
0
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1answer
30 views

HC-05/Arduino receiving spam data

I connected everything properly. On the first try I did receive data as I was supposed to. I then wrote some logic, re-uploaded and started receiving crazy spam. My serial monitor is getting ...
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1answer
43 views

ESP8266 + HC-05 on same arduino

I'm absolutely new to arduino, so please excuse me if this is a noob question. I want to use a ESP8266 esp-03 Wifi module with a HC-05 bluetooth module together with my arduino uno. Unfortunately ...
0
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1answer
69 views

Bluetooth OBD2 ELM327 connectivity issues

I made a little project using an Arduino UNO, a 3.5" display, a HC-05 bluetooth module and an ELM327 (cheap ebay clone). I managed to establish communication, read the data, interpret and display it, ...
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0answers
45 views

HC-05 and cheap Nano clone not powering on

I have a HC-05 module which works absolutely fine with an Arduino Uno. Because I need to reduce the size of it, I tried using an Arduino Nano. After correctly wiring it up to the Nano, sometimes the ...
3
votes
4answers
130 views

Can you help me trim my code?

First of all I want to be clear, I'm not very skilled in programming methods, all the C I learned was for various Arduino projects. That being said, I just finished a project that reads some data ...
0
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1answer
106 views

Text send via HC-05 is broken up by first character on the receiving end?

On the receiving end, I have an mit app inventor app which acts like a client. In arduino, I check for connection status and do a serial write to send the text. The code for that is below: #include ...
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2answers
60 views

HC-05 Bluetooth module got virus [closed]

We have a problem. Our HC-05 Bluetooth module got virus. We checked it in serial monitor and found out that the output is wrong. It has a mirrored question marks(⸮)and variables(b⸮, bW⸮, k⸮, U) which ...
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0answers
36 views

Can't write via bluetooth module when sensor is connected

I am trying to read data from a load cell, and execute certain functions on the arduino (e.g. reset scale), all via bluetooth module HC-07. However, when I connect the bluetooth to the arduino with ...
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votes
1answer
343 views

L298N, HC-05 Simple Bluetooth remote car not running in Arduino

Arduino board type used in this session is Arduino Uno R3 DIP/SMD CH340 Below is the description of wiring and code in Arduino to assemble a Bluetooth RC car using android smartphone: Tested the ...
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0answers
147 views

HC-05 not receiving sent data

I've been working with two HC-05 (master and slave) to send data between two arduino unos. I have them to where they should be connected - blinking in unison every 2 seconds, but I can't send any data ...
0
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1answer
39 views

HC-05 and p-channel mosfet

I'm trying to use a MOSFET (BS250P datasheet) to switch a circuit on and off while the MCU is asleep. It's a P-channel MOSFET that closes the circuit when the gate is pulled low. The most power hungry ...
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3answers
46 views

Bluetooth Modules not communicating correctly

I plug in BT rx to digital 11, BT tx to digital 10 and then 5v and ground from the HC-05 to the arduino. I then upload this code to the HC-05 that is set as a master. #include <SoftwareSerial.h>...
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1answer
1k views

Scan Bluetooth devices using HC-05 [closed]

Basically, I want to connect the HC-05 to a specific mobile Bluetooth(whose address is known) and when the connection is established I want to turn on a LED on the breadboard. I am totally clueless ...
0
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1answer
394 views

Connect one HC-05 “master” to two slaves at the same time

Does any one know what AT+CMODE=2 "slave loop" used for. As I try to connect one HC-05 master to two slaves using it, but it didn't work. i donot know if AT+cmode=2 is used for connecting to multiple ...
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0answers
422 views

Send readings to PC using HC-05

My project, briefly explained is a weather station that will send data periodically from an Arduino UNO (later an attiny85) to my PC for processing. I'm using a HC-05 bluetooth module to establish a ...
0
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1answer
113 views

Arduino 4wd rover [duplicate]

Guys i have made an arduino 4wd rover using L298N BRIDGE MODULE, HC-05 and Arduino uno but the power supply output of L298N was very low that even 1 motor is working too slow so please help me with ...
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1answer
438 views

Bluetooth a pushbutton from one arduino to another to turn on a LED

For a major project at school i need to get a bluetooth module to be able to communicate between two HC-05 modules as a master and slave. They need to be able to press a pushbutton on the slave and ...
-1
votes
1answer
469 views

Unable to convert string read from bluetooth to int [closed]

I am using a HC-06 and i want to read a number ending with f as a delimiter, the first three numbers as my servo position, however converting the string into int is giving an endless series of 0s. I ...
1
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1answer
241 views

Can't power HC-05(5v) with Arduino Pro mini (3.3v)?

I am trying to use HC-05 (5V) with Arduino Pro Mini (3.3v) but I have had little success. I am using a coin cell to power the pro mini which powers it on and is working fine. But, my HC-05 doesn't ...
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0answers
24 views

Error in communicating Bluetooth-android-arduino

I am trying to communicate Arduino with Bluetooth but when I send command through my Android device , the RX Led blinks but the Led I want to glow does not glow. my code is as follows: char data = 0; ...
2
votes
1answer
30 views

Can you make it so, when your phone connects to the Hc-05 on a Arduino, a variable changes?

So whenever my phone gets close, and it connects to the Hc-05, the Arduino changes a variable? I want to avoid the use of apps, where the user has to do anything after first time connecting. The ...
0
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0answers
33 views

bluetooth module and pic

I am currently working on a project that requires bluetooth module and pic. I need to get the ID or address of the connected device.Any idea how can i do it. I only know that this is done using AT ...
0
votes
1answer
219 views

How to externally power HC-05 module with Arduino Pro Mini?

guys, I am new to arduino. I am trying to power my HC-05 (5v with regulator to 3.3v) from Arduino Pro Mini 3.3v but I can't get it to power on. There is a problem: The site I bought HC-05 from says ...
1
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0answers
1k views

Send Bluetooth Data to Android App (HC 05)

I'm struggling to send data strictly from my arduino UNO to an android app using bluetooth module HC 05. I am able to send/receive using 1) the serial monitor in arduino IDE and 2) Bluetooth Chat ...
0
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0answers
151 views

Is there a bridge needed to connect Pro Mini 3.3v to HC-05 (level 3.3v)?

I can't understand how to connect my arduino pro mini https://www.amazon.in/gp/product/B071ZCHW5P/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 To my HC-05 Bluetooth module https://www.ebay.in/itm/...
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0answers
383 views

I can't receive data from HC-05 on android

I would like to send ad8232 sensor data to android. The sensor data appears on the serial monitor however it doesn't appear in bluetooth terminal applications on android. Here's the code : #include &...
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0answers
563 views

Arduino Uno reads the String that is sent through HC-05 from an Android Bluetooth terminal but doesn't respond

I'm building a home automation system using Arduino Uno and HC-05 Bluetooth module. Here, I'm facing two issues. For the following code that takes a single character as input. When I give certain ...
0
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3answers
367 views

How to use the HC-05 properly?

It all started when I was working on my Arduino project, which involves an Arduino Nano, an HC05 module and a bunch of sensors (DHT 11, soil moisture and LDR) with Blynk App. Everything worked as it ...
0
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1answer
55 views

Not able to control digital pins using commands sent via HC-05 module

I am trying to control the LED on pin13 using the below code but it's not working. With this code I am able to print to the Serial Monitor but the code has no effect on the any of the digital pins. I ...
0
votes
1answer
393 views

Arduino reads hc-05 device connecting status

Hello I want to get an arduino get status of bluetooth hc 05 if connect with device or not . I'm trying by myself and search on internet website but I can't find useful things.
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2answers
3k 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
1answer
79 views

A clarification needed about the HC-05

I have just got a new pair of HC-05 Bluetooth modules. I am working on a simple project. I'm trying to move two servo motors using two potentiometers. I followed a simple tutorial to move one servo, ...
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0answers
2k views

How can update HC-05 firmware with arduino ISP?

I've tried a lot for connection between a bluetooth device with HID profile and HC-05 bluetooth module. I got it's just possible with updating the HC-05 firmware to some bluetooth HID firmwares, such ...
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1answer
319 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 ...
1
vote
1answer
223 views

Protothread Library Stalling on One Thread

I am trying to use a protothreading library found here http://harteware.blogspot.com/2010/11/protothread-powerfull-library.html to perform protothreading with my Arduino so I can "simultaneously" ...
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1answer
82 views

Master Slave Arduino-Side Multiprocessing

I have started an Arduino robotics project with an HC-05 Bluetooth sensor to send data to my PC for processing. In my design the Arduino is to serve as the slave which gathers data from sensors and ...
0
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1answer
235 views

Reading/Writing Strings with Bluetooth Windows API

I am trying to use my HC05 so my Arduino can communicate with my Windows 10 PC. I have a program written using the Window API for Serial Communication but the problem is it looks like the Arduino/HC05 ...
0
votes
1answer
199 views

Connecting a servo via HC05 and HC06

I want to drive a servo via a HCO6 and HC05 link as a stand alone, using no android or PC. The question is how to send a 1.5 ms signal (generated with a pulse command on a Nano) from one HC to ...
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2answers
594 views

How do I make the HC-05 bluetooth module take data from the HC-SRO4, and then send it to my Android app?

Currently, I have an Arduino Uno set up, with a HC-SRO4 ultrasonic sensor printing distances of objects in front of it on a scale from 1-15 to the serial monitor. I want to attach the HC-05 bluetooth ...
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1answer
395 views

HC-05 module short circuit

I have bought a HC05 bluetooth module and I think I accidentally short circuited it. Is there any way to change the voltage regulator or methods to reuse it again?
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1answer
168 views

How to set Inquire Access Code (IAC) via AT commands on HC-05?

I am trying to set IAC of HC05 via AT Commands, but for some reason, the result is not as desired. I need to set the IAC as '1234', for which I enter the command: AT+IAC=1234 The module responds ...
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0answers
217 views

Reading HC05 Output

I am using an Arduino Mega connected with a motion sensor and HC05 bluetooth chip to transmit distance data to a larger computer, process it, and send a data back. Currently, I am having trouble ...
0
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1answer
1k views

Can't manually connect HC-05 master to slave

Using this as a tutorial, I've tried to connect the master Bluetooth module from my Nano to the slave module in my Mega. After following the steps in the tutorial, when I enter the command to my ...
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0answers
421 views

Arduino reading wrong values from MPU6050 when motors are running

I am making a quadcopter. I'm using: Arduino Uno 1000kv brushless motor HC05 Bluetooth module MPU6050 gyro sensor In my code, I started reading values from the gyro sensor and connected a battery ...