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Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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23 views

Please help! My Bluetooth Controlled Car Isn't working

I followed this tutorial: enter link description here I built it according to the schematic except I didn't connect an LED (I assume this isn't the problem). This is the schematic: I'm a beginner so ...
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17 views

Help with turning LED on using smartphone with HC-05

I followed this tutorial: Remote Controlled LED using HC-05 I've assembled everything, uploaded the code and connected it with my phone. The code: /* Arduino Turn LED On/Off using Serial Commands ...
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5 views

communication between two HC 05 Bluetooth module

i am trying to transfer data between two HC-05 modules one is master and another is slave, slave is receiving data successfully but after sometime about 12-13 seconds it starts garbage values and ...
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7 views

Bluetooth module with HID and state

I'm looking for a bluetooth module that support HID and can send strings and "hex buttons" to a Win 10 computer. It also needs a state pin or have a library that knows if the module is connected to ...
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16 views

Arduino Nano 33 IOT - Bluetooth Classic (Serial)

I've an arduino nano 33 iot and I'm working with the first time with bluetooth. So far BLE is working fine, I can use an app on my smartphone to check the services and characteristics. Is it possible ...
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20 views

Lg g6 can't find Esp32 bluetooth

My lg g6 cant find esp32's bluetooth. Lg g6 bluetooth is fine as i can connect other devices Esp32's bluetooth is fine as i can connec from my samsung s9 to the esp32. Tried reseting and clearing ...
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16 views

HM-10 doesn't responde after RENEW

Today I finally got two HM-10 modules. I did flash firmware using this tutorial. It worked until I didn't send AT+RENEW command. Now, LED blinks, I see device in BT terminal(Android phone) but I can't ...
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1answer
47 views

Sending Integer > 1 Byte from Android to Arduino over Serial

I´m using public abstract void write(int b) throws IOException; from class OutputStream on Android Studio to sent Integer (degrees from 0 to 360) to the Serial Port of my Arduino over HC06 ...
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1answer
42 views

Nothing gets sent to Arduino from Processing

I have a problem where I kwow that my bluetooth module (HC-05) is connected to a processing sketch, but nothing ever gets sent from the processing sketch,why? No error messages but the info never ...
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22 views

How do I get my servo to turn using bluetooth, is this a glitch?

I'm very new to coding with arduino so please excuse my naivety, For an electronics assignment I am making a servo turn back and forth using a HM10 BLE however each time I press a button that sends '0'...
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1answer
67 views

Control speed of a dc motor with a 9v battery [closed]

Problem: I want to have a 9v battery that powers a dc motor. I want to control it with a bluetooth remote that has 3 buttons. 1st button is turn the motor with 1.5v, 2nd button is motor off and the ...
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19 views

Cannot make sense of values from Bluetooth HC-01

I have a simple script that listens on pin 0 for input, and if it gets anything, it Serial.prints it. But I cannot make sense of the results. I have a basic app that sends text over Bluetooth (in the ...
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27 views

Adding bootloader to Feather M0 Bluefruit LE

I want to make a custom Feather M0 Bluefruit LE. I know this means that I will have to add a bootloader to the ATSAMD21G18. I have seen that there are many useful articles in relation to adding ...
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1answer
40 views

Convert Arduino MEGA Code to Arduino DUE Code?

I've been working with MEGA before. This code works completely with MEGA. I'm still at beginner level in Arduino. Q: How do I adapt this code to DUE? Note: I'm asking this question because I think ...
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32 views

help please ion combination of two scetch [duplicate]

i have a two scetch working the first one is set time with rtc matrix keypad to controll servo motor and the second one is HC-05 bluetooth module to controll servo using android app i want to combine ...
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2answers
91 views

Arduino Bluetooth communication is slowing down because of the 'for' loop!

I'm sending data to Arduino through the mobile app. So far, all the code has been running consistently. #include <SoftwareSerial.h> #define FASTLED_INTERNAL #include <FastLED.h> #define ...
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1answer
27 views

'Delay command' and bluetooth communication problem

I have a project where I send data to Arduino via Bluetooth using an Android application. For example, when I press 1 from the 'bar led' part of the application, an animation needs to happen. When I ...
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1answer
124 views

Is it possible to use WiFi and Bluetooth / BLE in the same ESP32 project?

@Majenko's answer works like a charm. I did have to make some changes as follows: Per Majenko, you need to change the Tools > Partition scheme. I used "No OTA (Large APP) as he suggested and it is ...
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29 views

Are there any transmission guarantees with the HC-06's bluetooth protocol?

I'm wanting to send serial data from multiple Arduinos to a Raspberry Pi using the HC-06 module. The connection will be delivering sensor data from the Arduino to the Pi for a smart home setup and it'...
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1answer
35 views

My HC-05 Bluetooth Module is not working

I have been trying to use the HC-05 Module with my Arduino Uno to control a LED, which can be turned on and off by my phone. Everything is fine when i input the values from the serial monitor. The ...
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40 views

How can remove the WiFi/Bluetooth libraries when compiling the firmware using the Arduino IDE?

I have an ESP32-D0WDQ6, which is part of the ESPIRIT freematics development kit. The processor is a 2-core Tensilica LX6 and the module has 520 kB SRAM + 4 MB external on-module flash. It also has the ...
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20 views

problem sending data from hc05 arduino to processing?

I am trying to send simple string values from my arduino to processing via bleutooth using the hc05 module. I already paired the hc05 with my computer and got its port name as shown in the image below:...
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38 views

Hardware/Software Serial communication abruptly stops (HC - 05 bluetooth module)

I'm trying to send the readings of 3 sensors simultaneously to my Android phone on an app I made using MIT App Inventor 2 via the HC-05 bluetooth module. For this, I'm sending a string like "20.067, ...
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17 views

iPhone and Bluetooth Silver Mate(RN-42)

I've been trying to connect an iPhone(iOS 12.3.1) with Bluetooth Silver Mate. I was finally able to connect them using HID and APL profile with authentication set to 1 & 2. I would like to send ...
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23 views

Elegoo Uno R3 Shorting out after wire is plugged into 5v

I'm pretty new to Microcontrollers and I have mostly just a programming background. What I am trying to build is a device that uses the ultrasonic sensor to turn a LED on/off using the HC-05 ...
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20 views

HC-05 Bluetooth AT Mode

I know that I need to pull pin #34 high on the HC-05 "chip" (AKA PIO11) while powering ON the chip in order to put it into AT mode. Can I leave that pin high while programming, or does it need to go ...
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70 views

Garbage Characters Being Sent from HC-05

I have a contraption that uses a HC-05 Bluetooth module and sends info to a processing program which controls the contraption. The processing program is a follows (from a video by How To Mechatronics,...
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1answer
129 views

Arduino MKR 1010 WiFi as BLE central/client

I'm trying to use my new Arduino MKR 1010 WiFi as a Bluetooth Low Energy central/client, however I could only find information on how to use it as a peripheral/server (for example with the ArduinoBLE ...
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1answer
129 views

Person (phone) detector that trigger an event esp32 cam [closed]

So me and my dad are trying to catch would be thieves and also someone leaving behind alcohol bottles. At his storage business the cameras don't reach to these spots. Without being too invasive I ...
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35 views

HC-05 Bluetooth module on breakout board with straight header pins

Has anyone found the HC-05 bluetooth module (on the breakout board) with straight header pins? I seem to only be able to find them with the 90 degree header pins. Removing those and soldering on ...
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17 views

Communication using two HC05 modules

I'm working on a project that consists of sending data from flex sensors from a master Arduino to a slave arduino that uses that data to control servo-motors. I am trying to start slow and just ...
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132 views

HC-05 Bluetooth fails AT+LINK

I'm trying to get a HC-05 connected as master to a Bluetooth ELM327 OBD scanner. The HC-05 is accepting AT commands, no problem. This is the sequence I use: AT+RMAAD (Clear any paired devices) AT+...
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38 views

Connecting Adriono to Ubuntu Bluetooth HC-06 connection

I'm trying to connect a Bluetooth serial stream from a Teensy3.2 to an Ubuntu laptop. The USB comms between the Teensy and the laptop work fine and the BT comms between the Teensy and my phone work ...
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88 views

LED brightness control problem

My first question here. As an example, I'm using https://howtomechatronics.com/tutorials/arduino/how-to-control-ws2812b-individually-addressable-leds-using-arduino/ code to control my lighting, which ...
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20 views

Only take certain characters from Arduino Serial Output [duplicate]

I am trying to create a ble scanner but only want the device address to be displayed The device address is the 12 characters before the :-0 in the outputs. In my code shown below I have tried to run ...
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1answer
33 views

Split serial monitor output to only save part of the output

This is the output i get from the serial monitor from using a HM10 in . How could i go about splitting the data using arduino uno. I only want to save the last 12 digits before the :- (4CAA0DE091B7) ...
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22 views

How to connect multible arduinos with diffferent HC-05's to the same android device?

I want to create an application, in android studio, that is connected to multiple Arduino. The connection is made with Bluetooth through HC-05 modules. At the moment I'm able to connect to one, but to ...
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1answer
52 views

Help with Bluetooth shield

Hey guys I have this Bluetooth shield Does anybody know how I can get it to connect to Arduino? I can't find any guides on it. I have this serial program that I want to use to turn on a led. but ...
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44 views

HC-02 Bluetooth module not visible

I am trying to connect to my robot car with the HC-02 module. The problem is that the module is visible on my phone only while the arduino uno board is connected to my laptop. At this point I can pair ...
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478 views

Change the mac address on an HC-05

So I tried to save a little money and bought (5) HC-05 bluetooth modules off of our good buddy eBay. When the modules arrived, as I was testing and setting up for my project (2 nano's connected via ...
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1answer
53 views

HC-05 connecting to Arduino

I have been looking through StackExchange, and searching on the web and cannot find an answer to my issue. Setup: Arduino Nano 168 HC-05 VERSION:3.0-20170601 I am trying to connect my Android phone ...
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0answers
41 views

HM-11 / HM-10 Bluetooth v.4 Serial communication with Arduino Pro mini

I got a HM-11. When I connect it to the pc directly via ttl converter it works fine. I can see the recived daten on the serial monitor. When I connect it to the Arduino pro mini to contorl it doesn't. ...
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1answer
27 views

Using an Android bluetooth terminal to change preset states on 8x8 LED matrixes

I'm trying to create eyes for a project, and while I have been able to properly program the different expressions, and have them triggered by commands from the COM3 terminal, I have not been able to ...
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32 views

BLUETOOTH MODULES Arduino

I am new to the world of electronics so please forgive me if I ask stupid questions. I would like to ask if there is a difference between Bluetooth Modules that state: "for Arduino" as well as those ...
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1answer
206 views

ESP32 bluetooth discovery parse names

I'm running a sample code from ESP32 examples and I'm scanning available BLE devices. I can see device MAC address etc. But for few devices I can't see their names.I am using ESP-WROOM-32 with ...
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1answer
69 views

Adafruit Feather 32u4 BLE compatible with Software SPI?

Let me preface by saying that I am not super experienced with electronics. I have an Adafruit Feather 32u4 that is using Hardware SPI to communicate over Bluetooth. Unfortunately, I'm also hoping to ...
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22 views

Joystick Bluetooth to Bluetooth to Motors [UPDATED] [duplicate]

I have updated the code, switching the Bluetooth sensors because my codes were switched(master was slave, and slave was master), putting the hc05s on the same baud rate, and removed certain comments, ...
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0answers
14 views

Bluetooth not Transmitting over HC05 Master Slave Setup [duplicate]

I am trying to control a robot, where I have one HC05 module as a master connected to an Arduino Uno with an attached joystick. This Arduino sends data signals that will run blocks of code on the ...
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42 views

Arduino Bluetooth to Control Joystick Issue

I am trying to control a robot, where I have one HC05 module as a master connected to an Arduino Uno with an attached joystick. This Arduino sends data signals that will run blocks of code on the ...
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0answers
20 views

ZS-040 Bluetooth module is undiscoverable

My bluetooth module is connected to arduino nano using voltage delimiter (to get 3.3V) exactly as its said in this article. I connected it to my phone and was able to communicate with it through ...