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Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

-2
votes
0answers
25 views

How to communicate with Arduino using Bluetooth/WiFi

I would like to make a project where an Arduino is able to receive texts from my iPhone and then flash a led when I receive a notification. I never use an Arduino and I am wondering if an Arduino ...
0
votes
0answers
15 views

Red Bear / Particle read BLE serial data

I am trying to create a simple LED on/off circuit where user can send an integer (1 or 0) from mobile phone via BLE to Redbear Duo and also receive simple print data back. I am new to BLE and this is ...
0
votes
0answers
10 views

Having trouble using HM-10 with my arduino

I am using the HM-10 bluetooth module with an Arduino Uno. I am able to connect HM-10 to my phone just fine using the app lightblue. My issue is that I cannot use AT commands and by that I mean ...
0
votes
0answers
15 views

Sleepmode for arduino [closed]

i have a project to done which is An arduino should send sensor data via bluetooth to raspberry pi so my quetion is, is it anyway to make the arduino bluetooth into sleepmode? because i want save ...
0
votes
1answer
22 views

Serial.write printing blank values

I've got an Adafruit Bluefruit NRF52 hooked up to the Adafruit BNO055 9-axis orientation sensor, but when I use Serial.write to send the data, serial monitor displays blank values only. The scroll bar ...
0
votes
0answers
10 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 ...
0
votes
2answers
42 views

Calculating Bluetooth Signal Strength using HC-05 modules [closed]

I would like to have two HC-05 Bluetooth modules attached to my Arduino MEGA, both calculating the Bluetooth signal strength, emitted from my phone, to determine whether the phone is located in front ...
0
votes
0answers
16 views

Checking/accessing Serial prevents clean upload of sketch via bluetooth?

I'm deploying some DIY home automation devices, built around a 3.3v pro mini, a HC-10 module, and a relay board. The arduino is able to be programmed over the bluetooth module, so once it's in the ...
0
votes
0answers
50 views

Problem in the library blynk

there was a problem loading the sketch, writing that the BlynkSimpleSerial.h library is missing. I tried to find on the Internet I did not tell me how to fix this error. #include <SoftwareSerial....
0
votes
1answer
41 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 ...
2
votes
1answer
54 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....
-1
votes
2answers
50 views

Distance measuring utilizing (1 or 2) Arduino Nano's

I would like to develop a small-distance measuring device that will be primarily used in indoor scenarios to measure a distance with cm accuracy (mm if possible). The device would be in a small form ...
0
votes
1answer
29 views

Is it possible to combine a HC-05 Bluetooth module and a shrinked arduino ATtiny45/85 to control a motor, LEDs, or other components? [closed]

I'm thinking of making a tiny RC toy project that is controlled through Bluetooth with most components at its tiniest size. I'm a complete beginner in this area so i'm not completely familiar with ...
-1
votes
0answers
17 views

Setting up my Arduino to communicate with my phone via BLE

My end goal is to be able to send files from my Arduino Uno to my phone. I have a Microchip WILC3000 shield that I am using for the Bluetooth. My problem is that I can not find any documentation on ...
0
votes
0answers
29 views

Convert normal keyboard into Bluetooth Keyboard

I am very new to the Arduino world, I am trying to convert my wired keyboard into a bluetooth keyboard. I have a few layman questions: Is it possible to add an audio jack adapter(like PS4 joystick ...
0
votes
1answer
45 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 ...
0
votes
1answer
38 views

Connect a button to bluetooth board and comunicate with Android

I want to create a small device, just a button that sends its status to an Android application through Bluetooth. I bought a Bluno Beetle, but the information it exposes to Bluetooth cannot be ...
0
votes
1answer
26 views

NRF51822 ± Arduino Uno / ATmegaXXX?

Hello I want to make a simple home automation project and I'd like to use an arduino uno for prototyping and later a atmega for deployment. I need some sort of a mesh communication method. I was ...
0
votes
1answer
30 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
28 views

Sketch talks to Android via BLE on Serial2 but times out after 5 seconds when Serial cable disconnected or not present

From an Android phone I am using the "Serial Bluetooth Terminal" app to communicate to an Arduino Mega 2560 with a Bluetooth Low Energy HM10 (Jaycar XC-4382) module connected via Serial2. If the ...
-1
votes
0answers
8 views

RX IN MEGA 2560 OUTPUT [duplicate]

I connecterd hc-05 bluetooth unit to mega 2560. it dudnt work. I found that the rx pin outputs 5v and Suppresses the signal transmited from the hc-05. (when the hc-05 tx pin is not connected to the rx ...
0
votes
3answers
78 views

I can send on software serial, but not read?

I've been cracking my head over this for a long while. Like many before me, I'm trying to send and receive data from a HM-10 bluetooth module, arduino mega adk and the app called BLE Scanner. I've ...
1
vote
0answers
68 views

SerialBT.begin(“name”) now causes brownout in ESP32

I'm attempting to run the example sketch SerialToSerialBT.ino. It's a pretty commonly used sketch. I successfully loaded it on one of my ESP32 chips last week, and was able to use a tablet serial ...
1
vote
0answers
92 views

Is there a module that will allow me to pair a bluetooth keyboard to an arduino?

I want to pair a bluetooth keyboard to an arduino project, so that pressing a key on the keyboard causes an action to happen on the Arduino. Let's say that pressing Q on the keyboard makes an LED turn ...
-1
votes
2answers
62 views

Arduino - expression cannot be use as function :( [closed]

Sketch: //XPERT MIND. //This program is used to control a robot using a app that communicates with Arduino through a bluetooth module. //Error Code Chart: Code 01; Turnradius is higher than Speed; ...
0
votes
0answers
41 views

Fastest communication between two arduinos wirelessly

So there are several options including radio frequency and Bluetooth but both seem slow. I need a wireless way to communicate between two arduinos. The values i need to send don’t matter i will choose ...
0
votes
1answer
128 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, ...
0
votes
1answer
174 views

Problem Uploading to the Arduino Nano board [duplicate]

]2I am using an Arduino Nano board. It has an ATmega 328P processor. For running the codes I use Arduino 1.8.6 Software. The issue is that when I am uploading my sketch to the board it shows me the ...
0
votes
1answer
50 views

Is two modules using Serial Interface on one Arduino Uno possible?

I was wondering if I have both a Bluetooth HC-05 module and a GPS module (uBlox 7N) is it possible both for both to be using the serial interface? I'm aware they cant be operating simultaneously ...
0
votes
0answers
584 views

ESP32 Bluetooth and WiFi coexistence

After some research, I figure out that it's possible to use Bluetooth and WiFi for some special operations (As Espressif engineer mentions). In my case the Bluetooth operation is simple, it just ...
1
vote
0answers
51 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 ...
-1
votes
2answers
31 views

Two HC05 Bluetooth Bind problem

I succeeded in giving an AT command. My two BL MAC addresses are 21, 13, A03B and 21, 13, A3E2. When I want to connect one to the other I use AT+BIND=21,13,A3E2. But then I see Error(7). If I use ...
3
votes
4answers
135 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 ...
1
vote
1answer
34 views

Problems improving the inquiry speed of Bluetooth HC-05

I'm buiding a project with the Arduino and Bluetooth HC-05 module that receives the MACs of Bluetooth devices around (does not connect, just inquiry). It works, but I want a better performance in ...
0
votes
0answers
53 views

Sending accelerometer data using BLE to a Cordova phone app

I'm working on a simple project, that involves an Arduino sending accelerometer data to a Cordova-based phone app using BLE. I've got my Arduino wired up correctly, I think - I can see the data in ...
0
votes
0answers
42 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 ...
0
votes
0answers
245 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 ...
-1
votes
1answer
43 views

HC-05 modules with joystick driven platform [closed]

I am working to create a joystick controlled platform using bluetooth to communicate, but am having several problems. The platform https://www.dfrobot.com/wiki/index.php/Cherokey_4WD_Mobile_Platform_(...
0
votes
0answers
46 views

Arduino loses communication with bluetooth when sending commands to nodemcu esp8266

i've been working on a project using an Arduino UNO, Bluetooth Module HC-06 and NodeMCU esp8266, the project consists on turning leds on via bluetooth and telling the esp8266 that the leds were turned ...
0
votes
0answers
43 views

Servo Motors Fidgeting [via potentiometers, sent thru Bluetooth]

I need help :( I have this robotic arm project and I am using standard potentiometers attached to a "controller assembly" to detect the movement of the human arm. I have monitored the values of my ...
2
votes
2answers
811 views

HC-05 bluetooth module not accepting AT commands

I have been attempting to program my HC-05 ZS-040 Bluetooth module for quite some time, and I cannot get the AT commands to return any values. I have searched google for quite some time, and I none of ...
1
vote
2answers
296 views

Why can't my bluetooth receive serial data from my android phone, but can send serial data from my bluetooth to my android phone?

I can receive serial data from my phone but I can't send serial data to the arduino using bluetooth. I can see my input from serial monitor to my Android but not the other way. I'm using ARF7044A ...
0
votes
0answers
210 views

HM-10 Central mode starting a connection

I'm trying to issue a connection via HM-10 from arduino (rather than my phone). However, I'm unable to start a connection from arduino using both AT+CON and AT+CONNL. When I try AT+CON I get OK+CONNA ...
0
votes
3answers
51 views

How to use BlueTooth on mobile device to find AccessPt and enter PW for ESP8266 WiFi on an Arduino controller? [closed]

How can I use BlueTooth on a mobile device to connect to my HC-05 equipped instrument to find the local WiFi AccessPt and enter the PW for my Arduino controlled instrument with ESP8266 WiFi? I want ...
0
votes
0answers
115 views

Bluetooth HC-05 Receiving at arduino

Yesterday i've bought bluetooth module hc-05 and it worked fine until today. When i send data from bluetooth terminal from android, EEBlue.available() is always 0 here's my code: #include <...
1
vote
1answer
26 views

why of 2 identical micro-controllers, only one can connect to a given device?

I am working with 2 identical (Arduino) Adafruit Feather M0 Bluefruit LEs. Only one of them can connect to a Universal Windows Platform app running on a Windows 10 machine. The other connection fails ...
1
vote
3answers
48 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>...
0
votes
2answers
38 views

String to equation problem

My project is to create a decimal adder via voice recognition. Its like a calculator that only does addition. I am using hc-06 bluetooth module to convert my voice to a string. Let's say for example, ...
0
votes
0answers
21 views

Input from two microphones to bluetooth

I am a complete noob at arduino, so I apologize if this is a stupid question. I would like to take input from two microphones and send the output to a bluetooth headset using an Arduino processor? Is ...
-1
votes
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 ...