Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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13 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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1answer
57 views

Person (phone) detector that trigger an event esp32 cam

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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0answers
10 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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0answers
33 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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0answers
7 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
78 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
24 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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1answer
460 views

Badly formatted characters using JDY-30 bluetooth module

I have a JDY-30 bluetooth module and have it wired like this (except using an Arduino Uno): It is working, but I need to use it with a 115200 baud rate instead of the default one of 9600. I also got ...
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24 views

Can Phone read notifications and send them to an Arduino? [closed]

I am looking for some way to have my android phone detect, read, and send information about notifications my phone receives to my Arduino for a smartglass project I am working on via Bluetooth. I ...
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1k views

Arduino Bluetooth data (large data files) transfer efficiency using HC05 module

Im using an HC-05 Bluetooth module connected to my Arduino MEGA. The Arduino has an SD card with some data files stored (sensor readings). After the sensor readings are done, the Arduino then connects ...
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0answers
9 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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1answer
47 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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0answers
34 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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0answers
16 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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1answer
43 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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64 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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3answers
4k views

Bluetooth HC-05 module returns encoded data

I have searched online, and haven't found anyone hitting this issue. Strangely my Bluetooth HC-05 is returning encoded data. I have tried using different boards - Induing, Uno, Freeduino and I have ...
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0answers
168 views

Scheduling and BLE Read on demand

I'm building a data logging device with BLE capability using RFduino. Sensors are read using timer interrupt to a buffer. When the buffer is full, then the whole buffer is written to SD card. At the ...
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0answers
99 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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0answers
246 views

Arduino hardwareSerial Bluetooth.println not sending string over 310 chars

Hey all I am wondering if my code below can be modified in order for the Arduino to send more than 300 chars to a HM-10 bluetooth 4.0 le module? #include <SoftwareSerial.h> #define ...
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1answer
210 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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0answers
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
27 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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0answers
15 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
2k views

Bluetooth shield/module for file transfer?

I'm currently working on a project that requires to display images on a touchscreen on my arduino. These images are neither stored in arduino nor any memory card. I want to be able to send the images ...
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0answers
1k views

How can I connect an arduino to a raspberry pi via an HC 05 bluetooth module and transmit data?

I am currently undertaking a project where I am attempting to build a bluetooth thermometer using an arduino. I have the temperature sensor working and returning temperature readings via a usb ...
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0answers
25 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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1answer
4k 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 ...
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2answers
7k views

Can not connect with Bluetooth hc-05

I connect my Bluetooth hc-05. But the blind led in the Bluetooth module is not stable when I connect with my Android phone. Help help me to solve this.
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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 ...
2
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3answers
3k views

Arduino board with built-in Bluetooth

I would like to find an Arduino with built-in Bluetooth. I know about the HC-06, the shields and the other Bluetooth modules, but i would like to have built in Bluetooth for eliminating the risk for ...
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2answers
8k 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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1answer
2k views

AT Commands HM10 BLE Module - Not working

I got the ble module to work fine following online guide. However when i changed the baud rate: AT+BAUD1 which changed to 19200 however ever since i was not able to get at commands to work. tried: ...
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3answers
435 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 --> ...
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0answers
11 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
949 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 ...
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2answers
796 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. ...
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1answer
21 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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2answers
91 views

Is it possible to connect miband2 and arduino nano (?)

I want to make an IOT project using an Arduino nano and I need heart rate sensors. I I have a miband2. So, is it possible to connect them ?
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1answer
947 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?)...
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0answers
27 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
41 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 ...
2
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1answer
42 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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1answer
561 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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2answers
934 views

Enabling quicker and more accurate MindWave Mobile detection?

Currently I am trying to get a Mindwave Mobile device to operate with an Arduino Uno. I'm following the guide here. However the sample code given doesn't work very well. I have been trying to get a ...
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1answer
399 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 ...
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1answer
540 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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0answers
18 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
37 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
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 ...