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Arduino Troubleshooting
Why I can't upload my programs to the Arduino board?
There are many pieces involved in getting a program onto your Arduino board, and if any of them aren't right, the upload can fail. They include: the drivers for the board, the board and serial port selections in the Arduino software, access to the serial port, the physical connection to the board, the firmware on the 8U2 (on the Uno and Mega 2560), the bootloader on the main microcontroller on the board, the microcontroller's fuse settings, and more. Here are some specific suggestions for troubleshooting each of the pieces.
Arduino Software
If you need Java 8 SDK for some reason, the two can coexist because the Arduino IDE will explicitly ask for the (Apple Version) of Java 1.6 using 'JavaApplicationStub': $./JavaApplicationStub JavaAppLauncher Requested 1.5., launching in 1.6 instead. Next we connect the working Arduino with a usb to the computer. Go to Tools - Board and select the chinese board that is not working. In my case it's an Arduino Uno. Next we go to Tools again - Programmer and select Arduino as ISP. Go to Tools again and select 'Burn Bootloader'. Go back to Tools - Programmer and set back to ArduinoISP. 1 Go to the Arduino downloads page and click the Mac OS X link to download a.zip file containing a copy of the Arduino application for Mac OS X. Currently, the file is 71.1MB. That’s quite a large file, so it may take a while to download. After you’ve finished downloading, double-click the file to the Arduino application and place it in your Applications folder.
Drivers
Drivers provide a way for software on your computer (i.e. the Arduino software) to talk to hardware you connect to your computer (the Arduino board). In the case of Arduino, the drivers work by providing a virtual serial port (or virtual COM port). The Arduino Uno and Mega 2560 use standard drivers (USB CDC) provided by the operating system to communicate with the ATmega8U2 on the board. https://yellowskills223.weebly.com/blog/sony-auto-launcher-mac-download. Other Arduino boards use FTDI drivers to communicate with the FTDI chip on the board (or in the USB-serial convertor).
The easiest way to check if the drivers for your board are installed correctly is by opening the Tools > Serial Port menu in the Arduino software with the Arduino board connected to your computer. Additional menu items should appear relative to when you open the menu without the Arduino connected to your computer. Note that it shouldn't matter what name the Arduino board's serial port gets assigned as long as that's the one you pick from the menu.
Access to the Serial Port
Physical Connection
Auto-Reset
Bootloader
Forum Support
If it still doesn't work, you can ask for help in the forum. Please include the following information:
Why do I get 'Build folder disappeared or could not be written' on Mac OS X?
Did you drag the Arduino.app out of the disk image (and into, say, your Applications folder)? If not, you won't be able to upload the examples.
Why doesn't the Arduino software run after I updated the Java on my Mac?
The latest Java update from Apple attempts to use 64-bit version of native libraries, but the Arduino application comes with a 32 bit version of the RXTX library. If you launch Arduino, you'll get an error like:
To fix this, click on the Arduino application (e.g. Arduino 16.app) in the Finder, and select Get Info from the File menu. In the info panel, click the Open in 32 Bit Mode checkbox. You should then be able to launch Arduino normally.
Why do I get a java.lang.StackOverflowError when I try to compile my program?
The Arduino environment does some preliminary processing on your sketch by manipulating the code using regular expressions. This sometimes gets confused by certain strings of text. If you see an error like:
Arduino For Mac
Caslon antique free download mac. this is what's happening. Look for unusual sequences involving 'double-quotes', 'single-quotes', backslashes, comments, etc. For example, missing quotes can cause problems and so can the sequence '' (use '' instead).
What type of power supply should I use with my Arduino board?
Typically, the Arduino board can operate satisfactorily on power that is available on the USB port of the computer that it is connected to, depending upon the number and type of optional Shield modules used with the Arduino board and the rated USB power current available from the computer (varies according to computer manufacturer and model). If you find that additional power is required from your Arduino board to operate it properly, or if you need to operate the Arduino board disconnected from a USB port or when using it with one that does not provide power, then you need to acquire a power supply that provides from 7 to 12V (Volts) of DC (Direct Current) power with enough current capacity for your needs. The AC adapters commonly available in retail stores for use with consumer products are often suitable, but make sure that it has the proper connector for plugging into the power socket on your Arduino board: 5.5mm diameter cylindrical plug with 2.1mm pin hole, and that provides Positive voltage on the inside pin hole and Negative (or common/ground) voltage on the outside cylindrical sleeve of the connector plug. For most applications, 1A (Amp) of current supply capacity is sufficient, but you may find that you’ll need more if you have a specific Shield module that needs it, or a stack of several Shield modules that along with the Arduino board draws a higher total current. You should sum the rated Input power current requirement for each Shield you are using along with your Arduino board to get the total needed, and acquire a power adapter/supply that provides a minimum of that total (higher current power supply current capacity has no ill effects).You also have to remember that the on-board 5V regulator cannot supply an infinite current (actually 800mA is a good choice in order to not overheat the board) so if one of your project need a large amount of power you can consider to provide the needed 5V (or what ever) selectively to the various equipment (using an appropriate number of power supplies and regulators if needed) and make them working together connecting all the GNDs in the same point.
Why doesn't my sketch start when I'm powering the board with an external power supply? (Arduino Diecimila or earlier)
Because the RX pin is unconnected, the bootloader on the board may be seeing garbage data coming in, meaning that it never times out and starts your sketch. Try tying the RX pin to ground with a 10K resistor (or connecting RX directly to the TX pin).
Why does the Arduino software freeze when I try to upload a program? (on Windows)?Arduino Software Mac
This might be caused by a conflict with the Logitech process 'LVPrcSrv.exe'. Open the Task Manager and see if this program is running, and if so, kill it before attempting the upload. more information
What if my board doesn't turn on (the green power LED doesn't light up)?
If you're using a Diecimila or older USB board (e.g. NG), make sure that the jumper (little plastic piece near the USB plug) is on the correct pins. If you're powering the board with an external power supply (plugged into the power plug), the jumper should be on the two pins closest to the power plug. If you're powering the board through the USB, the jumper should be on the two pins closest to the USB plug. This picture shows the arrangment for powering the board from the USB port.
Arduino Download Not Working MacbookWhy does my Diecimila take such a long time (6-8 seconds) to start my sketch?
Some of the Arduino Diecimila boards were accidently burned with the Arduino NG bootloader. It should work fine, but has a longer delay when the board is reset (because the NG doesn't have an automatic reset, so you have to time the uploads manually). You can recognize the NG bootloader because the LED on pin 13 will blink three times when you reset the board (as compared to once with the Diecimila bootloader). If your Diecimila has the NG bootloader on it, you may need to physically press the reset button on the board before uploading your sketch. You can burn the correct bootloader onto your Diecimila, see the bootloader page for details.
What should I do if I get an error when launching arduino.exe on Windows?
If you get an error when double-clicking the arduino.exe executable on Windows, for example:
![]() Arduino has encountered a problem and needs to close.
you'll need to launch Arduino using the run.bat file. Please be patient, the Arduino environment may take some time to open.
Why won't Arduino run on old versions of Mac OS X?
Download minitab free for mac. If you get an error like this:
you probably need to upgrade to Max OS X 10.3.9 or later. Older versions have incompatible versions of some system libraries.
Thanks to Gabe462 for the report.
What do I do if I get an UnsatisfiedLinkError error (about native library librxtxSerial.jnilib) when launching Arduino?
If you get an error like this when launching Arduino:
you probably have an old version of the communications library lying around. Search for comm.jar or jcl.jar in /System/Library/Frameworks/JavaVM.framework/ or in directories in your CLASSPATH or PATH environment variables. (reported by Anurag Sehgal)
What about the error 'Could not find the main class.'?
If you get this error when launching Arduino:
Java Virtual Machine Launcher: Could not find the main class. Program will exit.
make sure that you correctly extracted the contents of the Arduino .zip file - in particular that the lib directory is directly inside of the Arduino directory and contains the file pde.jar.
What can I do about cygwin conflicts on Windows?
If you already have cygwin installed on your machine, you might get an error like this when you try to compile a sketch in Arduino:
Fleetwood mac love shines download.
This problem is probably due to using incompatible versions of the cygwin DLL.
If so, first make sure that you don't have cygwin running when you use Arduino. If that doesn't help, you can try deleting cygwin1.dll from the Arduino directory and replacing it with the cygwin1.dll from your existing cygwin install (probably in c:cygwinbin).
Thanks to karlcswanson for the suggestion.
Why does do the Arduino software and the Tools menu take a long time to open (on Windows)?
If the Arduino software takes a long time to start up and appears to freeze when you try to open the Tools menu, there by a conflict with another device on your system. The Arduino software, on startup and when you open the Tools menu, tries to get a list of all the COM ports on your computer. It's possible that a COM port created by one of the devices on your computer slows down this process. Take a look in the Device Manager. Try disabling the devices that provide COM ports (e.g. Bluetooth devices).
Why doesn't my board show in the Tools | Serial Port menu ?
If you're using a USB Arduino board, make sure you installed the FTDI drivers (see the Howto for directions). If you're using a USB-to-Serial adapter with a serial board, make sure you installed its drivers.
Make sure that the board is plugged in: the serial port menu refreshes whenever you open the Tools menu, so if you just unplugged the board, it won't be in the menu.
Check that you're not running any programs that scan all serial ports, like PDA sync applications, Bluetooth-USB drivers (e.g. BlueSoleil), virtual daemon tools, etc.
On Windows, the COM port assigned to the board may be too high. From zeveland:
'One little note if you aren't able to export and your USB board is trying to use a high COM port number: try changing the FTDI chip's COM port assignment to a lower one.
'I had a bunch of virtual COM ports set up for Bluetooth so the board was set to use COM17. The IDE wasn't able to find the board so I deleted the other virtual ports in Control Panel (on XP) and moved the FTDI's assignment down to COM2. Make sure to set Arduino to use the new port and good luck.'
On the Mac, if you have an old version of the FTDI drivers, you may need to remove them and reinstall the latest version. See this forum thread for directions (thanks to gck).
What if I get a gnu.io.PortInUseException when uploading code or using the serial monitor (on the Mac)?
This probably means that the port is actually in use by another application. Please make sure that you're not running other programs that access serial or USB ports, like PDA sync application, bluetooth device managers, certain firewalls, etc. Also, note that some programs (e.g. Max/MSP) keep the serial port open even when not using it - you may to need to close any patches that use the serial port or quit the application entirely.
If you get this error with Arduino 0004 or earlier, or with Processing, you'll need to run the
macosx_setup.command , and then restart your computer. Arduino 0004 includes a modified version of this script that all users need to run (even those who ran the one that came with Arduino 0003). You may also need to delete the contents of the /var/spool/uucp directory.
I'm having trouble with the FTDI USB drivers.
Try installing the latest drivers from FTDI or contacting their support at [email protected].
Why doesn't my sketch start when I power up or reset the Arduino board?
Most likely because you are sending serial data to the board when it firsts turns on. During the first few seconds, the bootloader (a program pre-burned onto the chip on the board) listens for the computer to send it a new sketch to be uploaded to the board. After a few seconds without communication, the bootloader will time out and start the sketch that's already on the board. If you continue to send data to the bootloader, it will never time out and your sketch will never start. You'll either need to find a way to stop serial data from arriving for the first few seconds when the board powers (e.g. by enabling the chip that sends the data from within your setup() function) or burn your sketch onto the board with an external programmer, replacing the bootloader.
Why does my sketch appear to upload successfully but not do anything?
You have selected the wrong item from the Tools > Microcontroller menu. Make sure the selected microcontroller corresponds to the one on your board (either ATmega8 or ATmega168) - the name will be written on the largest chip on the board.
Check for a noisy power supply. It's possible this could cause the chip to lose its sketch.
Alternatively, the sketch may be too big for the board. When uploading your sketch, Arduino 0004 checks if it's too big for the ATmega8, but it bases its calculation on a 1 Kb bootloader. You may have a older bootloader that takes up 2 Kb of the 8 Kb of program space (flash) on the ATmega8 instead of the 1 Kb used by the current bootloader. If yours is bigger, only part of the sketch will be uploaded, but the software won't know, and your board will continually reset, pause, reset.
If you have access to an AVR-ISP or parallel port programmer, you can burn the latest version of the bootloader to your board with the Tools | Burn Bootloader menu item. Otherwise, you can tell the Arduino environment the amount of space available for sketches by editing the upload.maximum_size variable in your preferences file (see: instructions on finding the file). Change 7168 to 6144, and the environment should correctly warn you when your sketch is too big.
How can I reduce the size of my sketch?
The ATmega168 https://costnitro.weebly.com/blog/hp-utility-mac-mavericks-download. chip on the Arduino board is cheap, but it has only 16 Kb of program code, which isn't very much (and 2 Kb is used by the bootloader).
If you're using floating point, try to rewrite your code with integer math, which should save you about 2 Kb. Download parallels mac free. Delete any #include statements at the top of your sketch for libraries that you're not using.
Otherwise, see if you can make your program shorter.
We're always working to reduce the size of the Arduino core to leave more room for your sketches.
Arduino Download Not Working Macbook ProWhy don't I get a PWM (an analog output) when I call analogWrite() on pins other than 3, 5, 6, 9, 10, or 11?
The microcontroller on the Arduino board (the ATmega168) only supports PWM/analogWrite() on certain pins. Calling analogWrite() on any other pins will give high (5 volts) for values greater than 128 and low (0 volts) for values less than 128. (Older Arduino boards with an ATmega8 only support PWM output on pins 9, 10, and 11.)
Why do I get errors about undeclared functions or undeclared types?
The Arduino environment attempts to automatically generate prototypes for your functions, so that you can order them as you like in your sketch. This process, however, isn't perfect, and sometimes leads to obscure error messages.
If you declare a custom type in your code and create a function that accepts or returns a value of that type, you'll get an error when you try to compile the sketch. This is because the automatically-generated prototype for that function will appear above the type definition.
If you declare a function with a two-word return type (e.g. 'unsigned int') the environment will not realize it's a function and will not create a prototype for it. That means you need to provide your own, or place the definition of the function above any calls to it.
Why do I get errors about an invalid device signature when trying to upload a sketch?
If you get an error like:
Arduino Download Not Working Mac Pro
it can mean one of two things. Either you have the wrong board selected from the Tools > Board menu or you're not using the right version of avrdude. Arduino uses a slightly modified version of avrdude to upload sketches to the Arduino board. The standard version queries for the board's device signature in a way not understood by the bootloader, resulting in this error. Make sure you're using the version of avrdude that comes with Arduino (source code).
Guide HomeThe text of the Arduino getting started guide is licensed under aCreative Commons Attribution-ShareAlike 3.0 License. Code samples in the guide are released into the public domain.
Jan 22, 2019 By Team YoungWonks *
How do you program an Arduino using a Mac? This blog will tell how. But before we get into that, let’s take a look at what is an Arduino?
What is Arduino?
An Arduino is basically a single board microcontroller that is used for building digital devices and interactive objects that can sense and control objects in the physical and digital world. These Arduino boards are available both in preassembled form or as do-it-yourself (DIY) kits. Arduino board designs use a variety of microprocessors and controllers. The boards come fitted with sets of digital and analog input/output (I/O) pins that can be interfaced to several expansion boards or breadboards (shields) and other circuits.
One of the biggest advantages that Arduino boards have over Raspberry Pi is the fact that they can read sensitive values from sensors and Arduino boards have analog input and output and not digital input output which is the case with Raspberry Pi. This is why in some instances - especially where exact values are needed - it is a more apt choice. Say, if you want to make a device that automatically waters your plants. Now to do this, you have to measure the exact soil moisture, so an Arduino is a better bet because it can read analog values as opposed to the Raspberry Pi which will need another chip to read analog values.
Arduino has low maintenance and doesn’t get disrupted by power outages. But image processing needs can be done better with Raspberry Pi and Pi camera.
In this blog, we shall look at how we can program an Arduino board using a Mac OS. Here’s the step-by-step process to program an Arduino board with a Mac:
Downloading and installing Arduino on a Mac
Step 1: Get all the needed equipment in place. This means having with you the Arduino Uno board and the USB data cable that will help you connect the board to your Mac.
You’ll also need a breadboard, jumper cables(M-M), an LED and a resistor (with a resistance of say, 330 Ohms).
Step 2: Then start by connecting the narrow end of the USB data cable to your Arduino board as shown below.
Step 3: Then connect the other end of the USB data cable to your Mac. At this stage, your Mac and the Arduino board have been connected to each other using the USB cable. Refer to the pic below.
Step 4: Now go on to download the Arduino IDE on your Mac. To do this, open Safari on your Mac and just go to the website www.arduino.cc. Once you have opened the website, go to the software section and click on downloads from the dropdown menu. Now select the Mac OS X version, hit download and wait for the download to finish. Once it downloads, one can run the Installer in the next step.
Step 5: To install the IDE, we need to run the file that we just downloaded. Click on Agree and continue with the default settings for the rest of the installation. Once the installation is done, click on the close button to finish the installation.
Now that we have downloaded and installed the Arduino IDE on our Mac, we can carry out a number of tasks using the Arduino IDE. This includes getting the board to say, “Hello World”, running the counter program and lighting an LED - all using the Arduino.
Saying “Hello World”
Let’s look at what goes into writing our first program, the “Hello World” program. Let’s open the Arduino IDE that we have installed on the Mac. Make sure you check the board name under the Tools option as Arduino Uno. Also make sure that the communication port is selected as COM3. Now to see the information sent by our Arduino, we have to open the serial monitor we see on the right.
In the program, we start by putting Serial.begin 9600 in the void setup function which is the one-time setup required for exchanging information over the serial port from the Arduino to the computer. 9600 here is called the baud rate. It is the rate at which the Arduino can send symbols or characters to the computer.
In the void loop function, we use a very simple serial.print to show data on the serial monitor.
You can first save it and then upload the design onto the Arduino. You’ll then see that the words “Hello World!” are being sent by the Arduino to the computer and we can see the words on the serial monitor. You’ll see that the words “Hello” and “World” are appearing next to each other. However, if we use a n in our print command, we will see the two words printed one below the other.
Running the Counter Program
Let’s take a look at the next program. We will design a simple counter by opening the Arduino IDE and the serial monitor. Let’s start by defining the counter variable. Here we say int <space> counter equals one and add a semicolon at the end. This initializes the value of the counter to 1 at the beginning. Now just like in the previous program, we initialize the serial connection.
In the loop, we print the counter value and we also increase the value of the count by one. Here, we use the printIn function to automatically add a new line after having printed the value of the counter. Now this would be too fast and for us to understand what’s happening in the output, we add a delay and the argument is in milliseconds. So for a one second delay, we provide an argument of thousand to the delay function. Finally, increase the value of counter by one using the counter++ statement. Once we save and upload this design onto the Arduino, we will be able to see that a counter variable is constantly being increased in value and this value is being communicated to the computer over the serial connection.
Lighting an LED
Lighting the inbuilt LED on the Arduino
Now the next program we will be working on is blinking the Arduino’s inbuilt LED. You can see that right next to pin number 13 among the digital pins, there’s an LED which is orange in colour. We will learn how to make it blink once every second. And just like we do with the Raspberry Pi, we will start by initializing the pin to be an output so we can control its values. Here we say pinMode and we say 13 which is the pin for the inbuilt LED and we set it as an output so that we can send values of high or low. We then begin our loop function by setting value of the 13 pin to 1 (or high). We do this by using the DigitalWrite function. We then add a delay of one second and then we set the value of the 13 pin as low. Don’t forget to add a delay after turning it low. Now when you run the code, you should be able to see the light next to the pin number 13 blink.
Writing the program to blink an LED on the breadboard
Here we will see how one can write the program that allows the Arduino to make an LED on the breadboard blink once every one second. Just like in the previous case, we will set values and this time, we will choose pin number 12 and we will set it as an output. So we type the pinMode, 12, output. In the void loop, we use the serial to communicate messages from the Arduino to the computer. We use the DigitalWrite function to turn the pin on or set it to high. Then we add the delay of one second. In the same fashion, we will turn the pin off by using the DigitalWrite function. Similarly, we can add a message and a delay so that we see the output very clearly.
![]()
Next you can save and upload this. Go to your Arduino, make sure you have the serial monitor open so you can see the output. Now this code seems to work as it prints LED high and LED low every one second. At this stage, we need to make an LED circuit on the breadboard and connect it to the Arduino to see the actual result.
Making connections to blink an LED on the breadboard
Now we will explore the connections to be made on the breadboard so as to make an LED blink from the Arduino.
Here’s how you make connections to blink an LED on the breadboard using an Arduino:
Just like with Raspberry Pi, we set up the LED first. We place the LED on the breadboard across the middle separation.
Then we add a resistor (say with a resistance in the range of 220 to 600 ohms). We place one end of the resistor on the same line as the LED.
Now we connect the resistor’s other end to the railing for the Ground.
We use a wire to connect it to the Ground pin on the Arduino.
The closeup of the Arduino after the connections have been made will look like this.
We then connect the other end of the LED to the pin number 12 which we are programming for.
The closeup of the breadboard after the connections have been made will look like this.
Since the program is already on the Arduino, we should immediately be able to see the light blink.
Here's a video explaining in entirety how to program an Arduino using a Mac:
*Contributors: Written by Vidya Prabhu; Lead image by: Leonel Cruz
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