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Questions tagged [bluetooth]

Bluetooth enables short-range wireless communication between devices.

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SoftwareSerial problems

Hi we are using an Arduino Micro and working with a Bluetooth device and a Rfid Scanner from Sparkfun(ID-20 LA). For that we implemented 2 SoftwareSerial objects and the Serial port for the Serial ...
Robin's user avatar
  • 133
11 votes
4 answers
6k views

Choosing wireless tech for lowest possible lag

I am drafting a pub quiz project, where the Referee gives a signal and multiple players push their buttons. The first to push wins the right to give an answer. I want all buttons (referee's + X ...
Sergey Snegirev's user avatar
8 votes
5 answers
42k views

Arduino Pro Micro, get data out of Tx pin?

I have a Sparkfun Arduino Pro Micro with an ATmega32u4 on it and a Roving Networks RN32 Bluetooth Module Theoretically, I should be able to solder the Rx of the Bluetooth to the Tx on the arduino and ...
user3320919's user avatar
3 votes
1 answer
387 views

Change Servo Speed With RedBearLabs BLE Shield

I recently got the RedBearLabs BLE shield to use it to control two high spped continuous rotation servos. I have the BLE example sketch loaded and the ios controller app works. The problem is that the ...
zcmckenna's user avatar
2 votes
1 answer
1k views

Program arduino via USB while using a Bluetooth module (HC-06) [duplicate]

I have my Arduino Nano connected to the HC-06 module (with the RX/TX pins). My issue is that when I try to upload new code to my Arduino (via the Arduino IDE, through the USB connection) the Arduino ...
rufo's user avatar
  • 141
2 votes
3 answers
4k views

Programatic FOTA (Firmware-Over-The-Air) upgrades with Uno R3

I have been searching for a way to upgrade the sketch on my Arduino Uno wirelessly (preferable WiFi, but not a must). Does the Uno support such function? If not - are there any other boards that might ...
Avi's user avatar
  • 121
0 votes
1 answer
3k views

Problem : Trigger limit switch to stop DC motor

I want to make a project about automatic gate and garage door via Android app and connected by HC-05 bluetooth module. Each of the gate and garage door have two limit switches(located at each end of ...
Husna Amiliansyah's user avatar
0 votes
1 answer
4k views

Sending data using Bluetooth SPP-C Module without a Breakout-Board

tl;dr I can't send data using the raw SPP-C Bluetooth module without a breakout board. The communication via UART works fine as I am able to issue AT commands and get proper responses. But when ...
Kwasmich's user avatar
  • 1,513
13 votes
3 answers
32k views

Want to create bluetooth audio control (volume up/down, play, pause, etc.) for smartphone

I want to create a bluetooth remote audio control to control smartphone audio, essentially identical in function to this type of equipment: https://www.amazon.com/FAVOLCANO-Bluetooth-Button-...
Howiecamp's user avatar
  • 233
3 votes
2 answers
5k views

HC-05 bluetooth module not accepting AT commands

I have been attempting to program my HC-05 ZS-040 Bluetooth module for quite some time, and I cannot get the AT commands to return any values. I have searched google for quite some time, and I none of ...
Justin VanderBerg's user avatar
3 votes
3 answers
12k views

How to receive data via Bluetooth on an Arduino 101?

The Arduino 101 came out recently, and it has built-in "Bluetooth Low Energy" capabilities. The tutorials and code examples that can be found for the 101 all seem to be about transmitting data, but I ...
TheIronKnuckle's user avatar
2 votes
2 answers
731 views

Bluetooth module(HC 05) issues

I am trying to make a Bluetooth controlled 4WD robot. i was following a tutorial i found online (https://howtomechatronics.com/tutorials/arduino/arduino-robot-car-wireless-control-using-hc-05-...
Ayanfe Adekanye's user avatar
2 votes
2 answers
13k views

HC-06 Bluetooth RX & TX voltage (3v3 || 5v)

I acquired a HC-06 Bluetooth module, and understand that the voltage on the pins must be 3v3 and therefore requires the use of a voltage divider to lower the Arduino's 5v to 3v3 like this. But the ...
user2983041's user avatar
2 votes
0 answers
128 views

Arduino not responding while trying to flash over BLE

I'm working on wireless uploader for Arduino from iOS devices. I'm using HM-10 BLE module which seems to work ok. PIO 2 is used as DTR for resetting (see A [0x41] T [0x54] + [0x2B] P [0x50] I [0x49] O ...
4ntoine's user avatar
  • 211
1 vote
2 answers
254 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 ...
bopele's user avatar
  • 41
1 vote
0 answers
70 views

Program a mega2560 from a different Serial port

I want to be able to use my HC-05, currently on Serial3 to download code to on my 2560 from a connected android tablet. I'm currently running MegaCore, which has optiboot on it. I've looked for ...
Thom's user avatar
  • 173
1 vote
1 answer
2k views

Does baud rate for HC-05 Bluetooth module need to match the Serial Monitor?

I have this sketch that I got as a sample. I have the two HC-05s connected. What I type in one serial monitor shows up on the other, but as question marks. The most common reason for this I find is ...
David Green's user avatar
1 vote
1 answer
116 views

SoftSerial freezes on comparing getInt to int

I have a robot application on my Arduino which basically takes values from a SoftSerial instance on my 0/1 pins (connected to a Bluetooth board). From the 'driver station' I send speed values to the ...
Keaton Burleson's user avatar
0 votes
2 answers
3k views

Can I use a 6 pin Bluetooth module in a 4 pin socket?

I have a Funduino joystick shield and it features a 4 pin bluetooth socket in the top right hand corner (just above the D, T, - and + legends). For some reason, on eBay, 6 pin bluetooth modules are ...
Greenonline's user avatar
  • 3,040
0 votes
2 answers
3k views

Bluetooth sending values from two joysticks

Is there any good way of sending values from two joysticks from arduino A to arduino B? I tried sending using if statements, so if the Y- or X-axis' value changed then it would send that, but the ...
Keilara's user avatar
  • 29
0 votes
2 answers
13k views

HC-05 Bluetooth Module - INQ-Command doesn't work

For a project I need to connect a Bluetooth Remote control with an Arduino Nano. The Problem I am trying to setup a connection to said Bluetooth remote Control. This device is visible! (I have ...
Michael B's user avatar
  • 370
0 votes
1 answer
2k 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 ...
Bart's user avatar
  • 13
-1 votes
1 answer
442 views

Install Bluetooth inside a home theater, How?

I have a 5.1 home theater(old one), I would like to transform it into a audio streaming system. I have a Arduino UNO and HC-05 Bluetooth Module, and I don't know how to install it in my home theater(...
Harish S's user avatar
  • 121
-1 votes
1 answer
51 views

SimpleChat BLE Example prints scrambled characters

I am trying to use the SimpleChat application to test my RedBearLab Shield. If I send "Hello" and to to Serial.print or Serial.write the return what I see in my Serial monitor is stuff like "Fh`Fx**-...
Andi Stancu's user avatar