Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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26 views

ASCII and hex bluetooth car

Hi I am trying to send numbers to my arduino car to make it drive. But if I send it a value I get some hex value back I believe. If I send empty text via CoolTerm i get " m j " back to my terminal #...
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38 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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19 views

integer overflow in expression [-Woverflow] - TinyCircuit

I have a tiny circuit Bluetooth shield and I was testing out the sample code that was provided by tinycircuit. However, when I tried uploading the sample code into the board, I kept having the ...
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25 views

Any source code for connecting a tinyshield to another tinyshield?

I recently purchase 2 tinycircuit smart watch. I am wondering if anyone knows if there is any source code for me to reference on how do I connect one tinyshield to another tinyshield. I understand ...
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19 views

Bluetooth and 434 MHz RF transmission

Can we connect both Bluetooth and 434MHZ transmitter to one Arduino-UNO? The purpose for me is to send a message from an android phone and I want the transmitter on that Arduino to send the same ...
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2answers
31 views

HC06 correct baud rate but missing characters/ no AT commands

I have an issue with the communication between my Serial Monitor and my BT HC06 Module. Iam able to send ascii characters from my phone with BT connection to my local serial monitor. When i send ...
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1answer
40 views

Get data from Bluetooth scale

I am trying to get data from this type of scale https://acaia.co/products/pearl. It does not show up under discover-able Bluetooth devices on a computer or phone, but it does have an app which it ...
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39 views

Bluetooth toggle between two master device (Using UART)

we are currently using a BLE Tiny Circuit broad with UART codes. Is it possible to allow two master to connect to the circuit board and the circuit board will be able to transmit data to both ...
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1answer
68 views

HC-05 can not use lower pins only 8 and higher

#include <Arduino.h> #include <SoftwareSerial.h> char Incoming_value = 0; // SoftwareSerial BTSerial( 10, 11 ); // RX | TX + // SoftwareSerial BTSerial( 9, 10 ); // RX | TX + // ...
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14 views

Can the PN532 pull MAC address from Felica tags?

I'm trying to do an automatic pairing with Felica NFC tags but I need the MAC address because there is a certain order I would like sync up my device in order when I scan it to the NFC. To get it to ...
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78 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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25 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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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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13 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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1answer
130 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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22 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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18 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
267 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
45 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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24 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
137 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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33 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
46 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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37 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
96 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
36 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
208 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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31 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
84 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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43 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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23 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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56 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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19 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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24 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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21 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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108 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
175 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
180 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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38 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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26 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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247 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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46 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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147 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
38 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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24 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
53 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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54 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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657 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 ...