Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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1answer
608 views

ESP32 nodemcu serialbt sending data

I'm currently trying to send data from esp32 to my android app that I made. The sensor readings are showing in the serial monitor, however, what's showing on my app are either @ or &. Please help ...
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0answers
26 views

Is there any way to secure Esp32 BLE server?

I've got a project in which currently I am using Bluetooth classic (with SSP - Simple secure pairing) to communicate to my esp32 board with my android app, but Bluetooth classic serial communication ...
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2answers
564 views

Wireless Bluetooth USB HUB using Arduino nano

I have the following problem/idea: I have a electronics workbench and a separate PC desk. Now I have a USB HUB on the workbench, but it doesn't properly work, because the USB-cable to the pc is too ...
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1answer
53 views

Brushless Motor "twitches" on its own when connected to battery

I've been trying to make a Bluetooth slider app that can control the spin speed of a brushless motor. The transmitter I am using is Arduino Mega. The problem I'm having is that my motor will start ...
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2answers
372 views

I want to send the last 10 minute data via bluetooth

This was for photocell data logging for 30 sec intervals, now I want to write a code which commands from the cellphone and sends back the last 10 minute data. At first I thought if I make an array of ...
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2answers
71 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.
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1answer
228 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 ...
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1answer
76 views

BLE library for Beetle Bluno BLE with AVR architecture (Atmega328)

When I try #include <ArduinoBLE.h> in my Arduino program, I get the error: WARNING: library ArduinoBLE claims to run on samd, megaavr, mbed, apollo3, mbed_nano, mbed_portenta architecture(s) and ...
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1answer
309 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 ...
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0answers
45 views

ESP32 stack error when reading from BLE device

I'm using this code here to read data from a BLE thermometer using an ESP32. The code sometimes works fine and i can get the data: + Connect : a4:c1:38:69:0c:ff * Connected a4:c1:38:69:0c:ff + Found ...
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1answer
35 views

How to execute programs based on received bluetooth value - wake-up-light (ESP32)

I'm trying to execute programs on my arduino based on values received via bluetooth. Although I've experimented a lot, I'm unable to get the code to work. I have build a simple android app with three ...
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2answers
605 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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1answer
1k 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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1answer
51 views

Continuous Servo motor won't stop rotating

I wanted to use bluetooth to control my continuous servo motor to rotate 360° for once, and I used MIT app inventor for the ui to control it Also, my continuous servo motor won't stop rotating even ...
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0answers
25 views

Got ERROR in serial monitor of Bluetooth module BT05, won't even connect with my phone pin 123456

Always im getting this error when I just opened the serial monitor, I even buy another one with the same model, I have got again the same ERROR in my serial monitor any help? Don't think it ERROR:(0), ...
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1answer
114 views

How to use HM-10 as client, and send messages to specific services/characteristics?

I have been messing around with this module, unfortunately i bought a fake one, but got the original firmware running inside it (V550). So far i can set the HM-10 up as client/master and by using an ...
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0answers
60 views

Bluetooth HID keyboard for ESP-32 or Arduino Mega

I want to use bluetooth Keyboard in my project. I made a cool rgb and sound controller using Arduino Mega. My pins are: 4 push buttons (4 pins) 4 Toggle Switches (4 pins) 1 key switch (1 pin) 1 Rotary ...
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1answer
76 views

Arduino library or code for ESP32 to scan for Bluetooth devices?

Is there some code or library that would allow me to scan for nearby Bluetooth devices using a common ESP32 board ? I only found similar code for actual Arduino boards.
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1answer
2k views

Anyone have example code for ESP32 as media controller for Android/iPhone Media Apps

There's actually another post with this very same topic but no answers on that post. Back in January of 2020, the last commenter said he had sample code and then he went dark without posting the ...
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0answers
17 views

LightBlue to Arduino connection log does not display serial monitor printed data

I'm writing code so that, every time a hall monitor senses, my code additively measures 5 liters of volume as it prints each detection. Then, this data is sent via Bluetooth to a phone. (This is for a ...
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0answers
52 views

ESP32 Bluetooth Master does not connect

I want to connect an ESP32 to a SMA Sunny Boy SB5000-TL Solar convertor over Bluetooth, but I cannot establish a connection and I'm kind of stuck. I use the internal bluetooth module of the ESP32. ...
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0answers
41 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 ...
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0answers
33 views

Issues with the TX pins for recieving data from the HM19 and HC05

I bought a hm19 (link 2), 2 hc05s, an Arduino micro, and an Arduino due. I'm trying to turn an led on and off using my phone over Bluetooth. I verified that all modules work by themselves. So here's ...
3
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2answers
567 views

Bluetooth Communication Not Working with DC Power But Works With USB Power?

I am running a HM-10 Bluetooth Low Energy (BLE) module to transmit serial data (using SoftwareSerial) from an analog sensor onboard my Arduino Uno to a serial terminal app on my Android phone. When I ...
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1answer
50 views

Bluetooth and another sketch

I uploaded a bluetooth sketch from IDE (File->Examples->Firmata->Standard Firmata) to Arduino Duo. Now if I have a sensor attached to this Arduino, I can use bluetooth from another device (Raspberry ...
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1answer
484 views

I am trying to connect the PS3 controller with the Arduino Uno using a USB Host Shield. Getting stuck at 'PS3 Bluetooth Library Started' . Need Help

I did the research for similar issues and found that I had to enable debug. I did the following attempts: Changes to settings.h - enabled debugging by change from 0 to 1 Getting the following ...
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1answer
932 views

PC Cannot Access HC-06 Bluetooth COM Port

I have an HC-06 Bluetooth module connected to an Arduino UNO board to allow for the data received by the Ultrasonic sensor to be transferred to my PC via bluetooth and serial communication. I am using ...
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1answer
370 views

What is the highest baud rate that can work between Android device and an Arduino connected to an HC05?

I see a lot of baud rates in the AT Command documentation for the HC05 however I am not sure what is the fastest that can work between the Arduino controlled embedded system and the Android phone. I ...
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1answer
355 views

What is the best way to establish wireless communication between the Lilypad and a Mac?

I want to build a wearable device for a dancer using the Lilypad and I need to first send the programme from my Mac to the Lilypad board and then transfer the data read by sensors back to my Mac. I ...
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0answers
34 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 ...
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1answer
660 views

TX,RX,ON,l LEDs were red at all time

First of all Thank you for reading my broblem.Before coming this erro I did a project in my Uno board by using a Bluetooth module.after that; when I powered the board to uploade another programe ;4 ...
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1answer
84 views

avrdude: stk500v2_ReceiveMessage(): timeout error for bluetooth arduino

I am trying to link the Bluetooth module to my arduino UNO in order to wirelessly program a robot. The only issue that I am having is that the bluetooth module does not seem to pick up the arduino. ...
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2answers
14k 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-...
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2answers
167 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....
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0answers
61 views

ESP32 Classic Bluetooth Set Password

I am using ESP32 classic Bluetooth Feature for data transfer. I am using the SerialToSerialBT example. I am able to scan and discover the Bluetooth device from my smartphone. But the pairing is ...
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0answers
45 views

Need help with Bluetooth component for TinyCircuit

I am looking to get some assistance to learn how to program the Bluetooth module for TinyCircuits. I am currently using the UARTPassThrough.ino example to try and learn BlueNRG's functions. I see that ...
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1answer
728 views

How can I record something using an arduino and use bluetooth to search those terms on google now?

I'm trying to build something that can use voice recognition to search something up. I am planning to use this small module for the mic (https://www.sparkfun.com/products/12758), because I want to ...
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2answers
404 views

HC-05 to low cost AB shutter 3

I'm trying to connect a HC-05 to AB Shutter3 module. However, when I try to search AB Shutter3 address via AT commands (AT+INQ) I could not find AB Shutter3. I want to integrate both, so that I can ...
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1answer
564 views

How to setup Arduino Wifi Shield with Red Bear Lab BLE Shield?

I'm new to Arduino shields. I'm trying to stack these two shields on an arduino uno for a home automation project. 1 - Arduino Wifi Shield: 2 - Red Bear Lab BLE shield: http://redbearlab.com/...
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0answers
2k 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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1answer
277 views

Arduino communication to Raspberry Pi using HC-05

I'm using two HC-05 modules on two Arduino UNO boards. One of my modules connected successfully to a raspberry pi port. However the other doesn't want to connect, but sometimes it does and then ...
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0answers
57 views

ESP32 BLE service not visible to Node-RED

I've been trying to host a BLE-server on my ESP32 with a custom service. I'm trying to read the service data in NodeRED, but the service IDs and custom characteristics don't show up in NodeRED ...
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1answer
886 views

Control speed of a dc motor with a 9v battery

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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1answer
108 views

i can't work toggle for my small project

i build my small project from a few component as this photo after finish code and project . i work run for Proteus and then the project not run perfectly because my code need toggle for data entered . ...
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0answers
103 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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2answers
656 views

serial is print twice?

I have a problem , when send 1 or 0 by Bluetooth module the serial monitor print two time (RECEIVED SMS) . what's the wrong ? This is my code : char BluetoothData = 0 ; void setup() { // ...
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0answers
28 views

configuring characteristics to communicate data on the Arduino bluetooth low enegy module

I have the HM-10 Arduino BLE module. I am also building an app to send and read characteristics on the BLE module. On the Arduino BLE side of things though, how do I set up which characteristic ...
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0answers
25 views

ESP32 SerialBluetooth disconnects within a second after connecting but not BLEDevice/BLEServer

Code using BluetoothSerial api disconnects immediately after establishing connection with my laptop running Ubuntu 18.04. If instead of BluetoothSerial BLEDevice api is used, the connection stays ...
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1answer
888 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 ...
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1answer
686 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 ...

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