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Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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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
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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
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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
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1answer
21 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 ...
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0answers
8 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 ...
1
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1answer
3k views

Arduino Bluetooth and Ultrasonic Distance Sensor (HC-SR04): printing values over BT gives error

I'm trying to send the reading distance of an HC-SR04 sensor to an Android app, using Bluetooth. I succesfully managed to send values from many other sensor to the app, but when it comes to sending ...
0
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0answers
19 views

Makeblock mbot bluetooth connection issue [closed]

I have a MakeBlock mbot bluetooth version. I have mblock 5 installed on my laptop and the BT module on my laptop is BT4.2 (LMP8.256). I tried to add the mbot as a new BT device on my laptop but it ...
0
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6answers
2k views

Problems with serial communication from Arduino to Bluetooth HC-05

I just purchased some HC-05 Bluetooth devices and I have followed the directions to put the devices in AT command mode by holding EN HIGH when the HC-05 powers up. When I do this the HC-05 goes into ...
0
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2answers
40 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 ...
1
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2answers
6k views

HC-05 Bluetooth Module Blinking Red Light-Arduino Uno

I have looked on google for an answer to my problems to no avail. The you tube video I am following is here: https://www.youtube.com/watch?v=f1v0IMegCvU So basically on my android, I can't see the HC-...
0
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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 ...
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3answers
245 views

Unable to get response for BLE AT commands in Arduino Uno

I am trying to establish connection between two BLE (BT43) through AT commands from an Arduino Uno. I am not getting any response from the AT commands. The connections are as follows: Arduino Tx --> ...
0
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1answer
681 views

Parse Bluetooth string

I'm developing on android with bluetooth LTE, I can send hex codes, but I send one code at time, so I need to send many informations in this way, how can I recognize a string and save the datas inside ...
0
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0answers
49 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....
3
votes
6answers
8k views

Lowest power possible in Arduino

I have googled all around and I know about some tricks to make ATmega328 not being a power hog. I am using Arduino Nano V3.0. However, I didn't find out what is the minimal consumption possible with ...
0
votes
1answer
910 views

Using BLE Nano with LSM9DS1

I'm trying to use the BLE Nano to connect to a LSM9DS1 IMU. However when I am able to connect to the IMU, the values the Nano outputs do not update and do not seem to make sense. I am able to ...
0
votes
1answer
40 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 ...
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2answers
690 views

Arduino Bluetooth Range Control

I am creating a project that uses Bluetooth, But unfortunately it requires some kind of control of the range. I was thinking a potentiometer controlling the power going to the transmitters antenna. ...
0
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1answer
563 views

Cannot retrieve data from homemade ECG

For the past couple of weeks, I have not been able to find a solution to my problem. My problem is that I cannot retrieve the data from my homemade ECG that I created from Arduino. I am a total ...
0
votes
1answer
29 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 ...
1
vote
3answers
1k views

How to break connection HM10 Bluetooth?

I have 2 HM10 Bluetooth modules connected to 2 Arduino Teensy running the following code. void setup() { Serial.begin(9600); Serial1.begin(9600); // If the baudrate of the HM-10 module has been ...
2
votes
1answer
53 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
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1answer
916 views

How to connect mini jack output to arduino mini pro and send sound to it?

I would like to connect arduino mini pro to mini jack output and send sound through it. What would I need here, how can I connect the mini jack to arduino and how to send data of sounds (any library?)...
-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
2answers
4k views

How to solve problem AT+INQ ERROR (1F), AT+INIT ERROR(17) on Bluetooth Module HC-05?

i have problem with accessing at-command in module Bluetooh HC-05. i just follow all tutorial to activate at-command like this, http://www.martyncurrey.com/arduino-with-hc-05-bluetooth-module-in-...
2
votes
1answer
1k views

Adafruit nRF52 feather board [SOLVED]

I am working on a project (the scenario is depicted in the attachment) involving Bluetooth Low Energy (BLE). As a master (central device) I am using the Adafruit nRF52 feather board (https://learn....
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 ...
0
votes
1answer
402 views

Bluesmirf Mate Silver (RN-42) enter command mode when in HID mode

I am having problems getting the Bluesmirf Mate Silver (RN-42) into command mode once I have switched to HID mode. I have bought a second new Bluesmirf Mate Silver to confirm my issue. I soldered the ...
-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 ...
1
vote
3answers
180 views

Accelerometer IoT

I am not sure if I am in the right place. I would like to build a device (as small as possible) that has an accelerometer and can talk to my phone via bluetooth. Im not asking anyone to build this for ...
0
votes
0answers
28 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 ...
1
vote
1answer
337 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 ...
0
votes
1answer
521 views

Writing data from multiple sensors in burst mode to an Arduino Due

I need help developing a simple sketch that can read data simultaneously from 3 analog accelerometers and send it in 'burst mode' to be stored on an SD card, to reduce the effect of latency. I used ...
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 ...
4
votes
2answers
11k views

Problems connecting reliably using HC-05 (as bluetooth master)

I currently try to connect an Arduino Micro/Leonardo/32u4 to an ELM327 Bluetooth dongle using a HC-05 Bluetooth shield from iTeadStudio. I also have similar problems trying to connect to a bluetooth ...
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
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
1answer
181 views

When the TX and RX pins for Bluetooth are connected the LCD screen will not update. Why is that?

I have connected a Bluetooth shield and LCD screen to an Arduino Uno. I have two active low push buttons to increase or decrease the variable desiredTemp. This value is meant to be displayed on the ...
0
votes
2answers
1k views

HM-10 discovery issue

i am not able to detect any android device on my bluetooth HM-10 module which is connected to arduino. i am able to see my bluetooth module on my android phone. but i want to see android phones on ...
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 ...
5
votes
5answers
21k views

Can I measure velocity from an accelerometer? How accurately?

I've bought this module Kootek GY-521 MPU-6050 MPU6050 Module 3 Axis analog gyro sensors+ 3 Axis Accelerometer Module My project will involve affixing this to a moving object, moving at velocities ...
1
vote
2answers
2k views

Read BLE Characteristic Value in Arduino Uno

I am trying to build a Smart Led project using Arduino Uno, RGB Led, HM-10 BLE module, and Android device. I am able to connect HM-10 with my android device and read and write characteristic values ...
1
vote
0answers
768 views

HC-05 and HC-06 Bluetooth not communicating well

Please I am trying to communicate between two arduino UNO. One has a HC-05 which is configured as master, the other arduino has HC-06 which is the slave. What I want to achieve is to be able to print ...
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 ...
0
votes
0answers
165 views

Connect Bluetooth SparkFun Bluesmirf to PS4 Controller

I'm trying to connect the SparkFun Bluesmirf Silver board (RN-42) to a PS4 controller. This should be possible as far as I know; however I have been unable to thus far. I have searched the internet ...
0
votes
2answers
1k views

how to send data to Adafruit Bluefruit Feather (32u4) over bluetooth?

Sup yo. I have my Adafruit Bluefruit Feather all wired up. It's lovely. I've got it responding to commands over the USB serial, activating an array of octocouplers. It's terrific. Here's the ...
1
vote
0answers
88 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 ...