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10 votes
Accepted

How to know positive and negative in breadboard

You decide which rails are positive and which are negative when you connect them to the + an - from your power supply or battery. A breadboard isn't polarised per se. It's just a bunch of cross-...
Enric Blanco's user avatar
  • 2,114
5 votes
Accepted

A proper way to get the roll, pitch and yaw values

In some sources there is something going on as the importance of order of the application of roll,pitch and yaw. But I cannot understand why this is related. Take your right hand: point your thumb ...
tttapa's user avatar
  • 1,320
3 votes

Receive data from Arduino board to Android application

I don't think your code is correct: void loop () { if (blueTooth.available()) Serial.write(blueTooth.read()); if (blueTooth.available()) <---- blueTooth.write(Serial.read()); } ...
Code Gorilla's user avatar
  • 5,637
3 votes

How to know positive and negative in breadboard

As gre_gor said. A simple breadboard contains of rows and columns of connections but sometimes for convenience manufacturer marks or prints Positive and Negative symbol along the row as they are ...
Sagnik Pradhan's user avatar
3 votes

Arduino: Camera streaming

Not even close In light of 1 it doesn't matter Get a Pi if you want to do video
Delta_G's user avatar
  • 3,378
2 votes
Accepted

Sending data via bluetooth

I've found the problem It should be: Serial1.println("2"); instead of: Serial1.write("2");
Krzysztof Majewski's user avatar
2 votes

Programmatically Upload Arduino Sketch From Android App

If I wanted to do this for a conventional Arduino I'd start by figuring out the operations against a serial API to talk to the bootloader, and perhaps test it against something exposing desktop serial ...
2 votes

Control/Interacting with Android OS using Arduino board

What you've seen is most usually a bluetooth module which has a "virtual COM port" service -- you connect to the bluetooth module and you can then send a data stream up and down through this COM port, ...
Maximilian Gerhardt's user avatar
2 votes

How to make a smooth serial print?

I bet your problem has nothing to do with “smoothness” (whatever that means), but is entirely due to lack of message framing. The serial and bluetooth links do not transmit messages: they transmit ...
Edgar Bonet's user avatar
  • 43.6k
2 votes

How will Arduino sketch and Android app communicate over GPS?

How will i make arduino with gps to communicate with android app? i just need this for my school project. as gps is one-way communication, you will have to either launch your own birds capable of two ...
dannyf's user avatar
  • 2,770
2 votes

Change the baud rate of HC-05

I played a lot with HC-05 and HC-06 until I understand the way they work. Now i've big Android App communicating with HC at 115200 bauds and sending and receving heavy data. I hope these tips will ...
Peter's user avatar
  • 365
2 votes

Problem connecting Android app to Arduino

In the loop function you have a line If (Serial.available() < 1) return; This prevents further code to be processed if there is nothing in the hardware serial buffer. Think about that.
Mert Gülsoy's user avatar
2 votes

HC-05 Bluetooth Module Blinking Red Light-Arduino Uno

There are several issues to consider: • Program downloading • HC-05 serial communication • Bluetooth pairing For the first issue: The serial-over-USB connection between the development computer and ...
James Waldby - jwpat7's user avatar
2 votes
Accepted

Serial communication between a single Android device and multiple Arduino boards

Use a third Arduino, which serves as a hub. It is connected to your Android and to all Arduino Uno devices you want to interface. It passes the commands to all Arduino devices, and the feedbacks to ...
dda's user avatar
  • 1,588
2 votes
Accepted

Use Android on Arduino TFT

No. Not even remotely. Android runs on a powerful computer not a tiny embedded microcontroller.
Majenko's user avatar
  • 105k
1 vote
Accepted

Esp8266 not responding to GET request from Android app created using MIT App Inventor

I have found out the solution to this problem. The code that I had written in the Arduino IDE for the Esp8266 was not correct for handling the GET request. It only accepted data as a simple Web ...
user151016's user avatar
1 vote
Accepted

Why can't my bluetooth receive serial data from my android phone, but can send serial data from my bluetooth to my android phone?

Your erroneous level shifting attempt from Bluetooth TX to Arduino RX is the root of your problem. Pins 0 and 1 are also connected to the on-board USB interface chip via a pair of 1kΩ resistors. ...
Majenko's user avatar
  • 105k
1 vote

Arduino program has suddenly stopped updating

Thanks guys, taking the labour out of the ISR has solved the problem perfectly. Unfortunately, the advice wasn't given as an answer so I'm unable to credit you for it, but appreciate the solutions ...
user4163554's user avatar
1 vote
Accepted

Can you make it so, when your phone connects to the Hc-05 on a Arduino, a variable changes?

Detecting successful connection with HC-05 The HC-05 can be configured to do what you are after. Search for "POLAR" in the AT set documentation. AT+POLAR=0,1 should be what you need as per their ...
mystery's user avatar
  • 331
1 vote

Arduino: Camera streaming

Assuming a 0.3 MP camera, that means 300,000 pixels. The Arduino (Uno) has a few KB of SRAM, so you need much more. External SRAM might be an option, but even 300.000 pixels need a lot (like multiple ...
Michel Keijzers's user avatar
1 vote

How do I make the HC-05 bluetooth module take data from the HC-SRO4, and then send it to my Android app?

First, it will read the values from the serial monitor. Then, I would like the HC-05 module to take these numbers and continuously send it to my Android app, which will then process what to do with ...
dda's user avatar
  • 1,588
1 vote

HC-05 Bluetooth Module Blinking Red Light-Arduino Uno

Try this code(it's simpler): char data ; void setup() { Serial.begin(9600); pinMode(13, OUTPUT); } void loop() { if(Serial.available() > 0) { ...
Vikhyat Agarwal's user avatar
1 vote

Receive multiple data from arduino using String builder

You can convert each value to string before sending to bluetooth using string.contain("string"), like this: if (sbprint.contains("C"){ temptv.setText(sbprint);} if (sbprint.contains("H")){ ...
user61841's user avatar
1 vote

Arduino Uno with UsbSerial Android library w/ baud rate over 9600?

I have no enough reputations to make a comment so I will drop my two cents here. Are you changing the baudrate at both sides? I have been using the arduino's built-in UART library for a while using ...
Macit's user avatar
  • 281
1 vote

Control Android Camera using Arduino over Bluetooth

I am trying out Camera Pro. It allows shutter control on Android over Bluetooth. I just got an Uno R3 and and HC-05 so I have not wired it up to try it. There are example sketch and detailed docs ...
Sammy 3D's user avatar
1 vote
Accepted

Data sent via UART Bluetooth different than SerialMonitor

The problem has nothing to do with the bluetooth. It is purely down to how you are formatting the data: % 2.3d % 2.3d % 2.3d d is a signed integer. You can't format a floating point value as a ...
Majenko's user avatar
  • 105k
1 vote

Is it possible to digitally stop a moving motorbike using an Arduino module?

Assuming that you simply want to stop the engine, Gerben's comment has the answer: Put a relay in series with the ignition. Control the relay with the Arduino. Opening the relay breaks the circuit. ...
Dampmaskin's user avatar
1 vote

Unable to receive SMS on Android

In the SIM900 is an AT command that let you do a factory reset, your module will restart to the default values. It must be an AT command very similar to the SIM800. The AT commando that (perhaps) ...
k.Cyborg's user avatar
  • 262
1 vote

BLE Shield v2.1

I would guess that the problem is an incorrect PIN or passkey. I've read from manuals for some gadgets that some devices/phones automatically try the PIN 0000 and some don't. I have never seen my ...
Code Gorilla's user avatar
  • 5,637
1 vote

Arduino audio frequency reader

If you can properly bias your signal, say with a cap and a pot, you could read it with a digital input. You can then time the rising edges with micros(), either by polling the pin or using an ...
Edgar Bonet's user avatar
  • 43.6k

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