Openframeworks, reading serial data from Arduino
c++,serialization,serial-port,arduino,openframeworks
Arduino's Serial.println translates the raw bytes into their ASCII equivalent and then sends those bytes followed by linefeed (10) and carriage return (13) bytes. So, the raw byte 12 is sent as 4 total bytes -- two bytes representing the ASCII 1 (49), 2 (50) and then (10) and (13)...
How do I add Arduino libraries to Eclipse Project?
If you go to Project->Properties->C/C++ Build->Settings You can add a library under the appropriate compiler with -l and you can include directories for headers with -I under C/C++ General->Paths and Symbols under the includes tab.
Is it possible to program an Arduino from another embedded device?
sure, why not, it is just spi. I think just out of convenience (of something with spi on it or trivial to bit bang) I use another microcontroller to program my avr (an msp430 or mbed which program easily over usb). avrs docs are pretty good on the protocol. you...
BLE GATT onCharacteristicChanged not called after subscribing to notification
android,arduino,bluetooth-lowenergy,gatt
So, I finnally figured out my mistake :) As you can see above, I'm usinng a UUID with the same base for my descriptor as my characteristics (starting with 3f54XXXX-....) I changed it to public static final UUID X_ACCEL_DESCRIPTOR_UUID = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb"); and now everything is working as expected. I did...
Servo driver code makes servo behaving oddly
You are misunderstanding how servos work. First off, they have to have a high pulse from ~700~2300us. A high pulse that is 1500us long will center the servo. Using a delay in ms will NOT work. You must use delayMicroseconds. Additionally, even the slightest time jitter in the pulse will...
My SerialPortEvent does not receive data using jSSC in a continous loop
Found the answer myself after wasting 4hours. I was better off using the readBytes() method with a byteCount of 1 and timeOut of 100ms just to be on the safe side. So now the read method looks like this. private byte read() throws SerialPortException{ byte[] temp = null; try {...
Arduino Uno - Incorrect/Scrambled Serial Data
binary,arduino,arduino-uno,eeprom
you are sending binary numbers to the serial port and not converting them to ascii, do this small change in your setup code by converting the binary numbers to ascii, char my_buffer_ax[10]; char my_buffer[200]; memset(my_buffer, 0, 200); strcat(my_buffer, "PO: "); //Set address pins to output for (int i=0; i <...
Avr-g++ compilation failed with Make Error 1
eclipse,arduino,make,avr,avr-gcc
The error message is coming from the assembler as. The AVR assembler avr-as does accept the -mmcu option. Perhaps Eclipse is choosing some other as instead? Using "/bin/avr-g++" in the makefile looks suspicious to me. I would think that you should set up Eclipse to look for the toolchain in...
Communication from C++ to Arduino Programming language on OS X
Take a look at boost asio or Qt Serial Port. Both are portable versions for serial-communication with C++. There is no other option, which could be simpler than serial communication....
Led Stays on even when digitalRead is low
My found the issue my code was ok it was my circuit. The pins i declared to receive input was not connected to ground.
Arduino Uno, multiple processes, multi-threading
It looks like you might want to redesign this. While you might want to use something like threading on a desktop platform you don't have any hardware support for concurrency in that manner on the Arduino UNO. You do however have interrupts which you can use for your current problem....
bitWrite function with a pointer
Adruino is not a programming language but a microcontroler platform for which you could write code in c. you wrote in your code: Cyi = Cyo; but Cyi is of type "bool" and Cyo a type of "bool *" correct it with Cyi = *Cyo; ...
Arduino Programming Without Arduino Libraries - Atmel Studio
arduino,avr,atmega,avrdude,atmelstudio
Provided you are familiar with C, I recommend to start with the AVR Libc reference inspect iom328p.h for your processor specific definitions (located under ...\Atmel Toolchain\AVR8 GCC\Native\[#.#.####]\avr8-gnu-toolchain\avr\include\avr) optionally, in Atmel Studio create a new ASF board project selecting device ATmega328p and inspect the sources loaded into your project folder from...
Arduino project- print
My suggestion to you would be to add a delay to your code after the Serial.print("Storage");, like so: buttonState = digitalRead(buttonPin); if (buttonState == HIGH) { Serial.print("\t"); Serial.println("Storage"); delay(500); } } What I suspect is happening is that even when you push the button quickly, the void loop goes through...
javascript message passing in nodejs
It wasnt a sytax error .. Had to add board.servoConfig(5, 0, 30); I added it in the code like this: var firmata = require('firmata'); var board = new firmata.Board('COM4',function(){ }); var WebSocketServer = require('ws').Server; var wss = new WebSocketServer({ port: 8081 }); wss.on('connection', function connection(websocket) { websocket.on('message', function incoming(message) {...
Two Arduino class instances returning same values
I updated my GPSLocation class as follows which solved my problem. Thanks guys. GPSLocation.h #ifndef GpsLocation_h #define GpsLocation_h #include "Arduino.h" class GpsLocation { public: float latitude; float longitude; }; #endif GPSLocation.cpp #include "Arduino.h" #include "GpsLocation.h" Setting and getting from Test.ino as follows loc1.latitude = -12.3456; Serial.print(loc1.latitude, 4); ...
3D array of strings
Most of your attempts have the same issue, you have stored the pointer to the table in progmem but the actual table data itself (in this case the strings) are not stored in progmem. Unfortunately GCC attributes (as of gcc 4.7) only apply to the current declaration so you have...
Accelerometer data: How to interpret? Sparkfun ADXL335 with Arduino
I wrote a blog post about this device on an Arduino that should answer your questions. http://chrisheydrick.com/2015/02/05/adxl335-accelerometer-on-an-arduino/ In short, the values you're seeing depend on the power delivered to the ADXl335. The sensitivity (mV/g) is stated to be ratiometric in the data sheet, and the example given is that when...
Arduino serial works fine with Debian but hangs with Raspbian
I found it ! It seems like on Raspbian, the communications were terminated by a NULL character. But not on Debian. And this NULL character was polluting my calculations of incomming buffer length. So i ended up by eventually suppress it on the Arduino side : boolean readCommand() { //...
How to parse the JSON result for module values and take the action?
You need a parser. A simple library that does the job is the following: http://sourceforge.net/projects/cjson/...
android cant connect to wifi network programatically (drops after few seconds and come back to previous one)
with android lP version, android checks the network internet status and if connected network do not have internet and in previous connected network(any of) have internet ,Android device gives preference to internet enable network.
Memory management when dynamically creating an array of structs that contain another dynamically created array of structs
c++,arrays,dynamic,struct,arduino
NO the previously allocated memory will not be freed. You will lose all allocated memory. By overwriting your persons pointer, you lose your handle on the allocated storage. So before you do this, you have to call ::operator delete(persons[0].pets); ::operator delete(persons[1].pets); ::operator delete(persons); This is pretty ugly, isn't it? For...
Error: expected constructor, destructor, or type conversion before '=' toke
You can't have an assignment statements outside of a function/method context. Either initialize properly: unsigned char topState = 1, leftState = 1, rightState = 1, fwdState = 1, bwdState = 1; Or write/call an initialization function someplace....
GPS ublox-6 neo6 communication with Microcontroller using SPI
gps,arduino,microcontroller,spi,pic32
So I am not using the SPI but UART for my Ublox LEA6T implementation. I can however speak to the fact that the NEMA you receive look valid IF there is no antenna or signal to the GPS receiver. If you post your actual SPI digitalWrite code I may be...
How do I store an integer array in the RFduino flash?
You can access the data as if you were accessing an array. To test this you can (temporarily) comment out your FLASH-writing piece of code and run this snippet: byte *p = (byte*)ADDRESS_OF_PAGE(MY_FLASH_PAGE); Serial.println("The data stored in flash page " str(MY_FLASH_PAGE) " contains: "); for (count = 0; count <...
Arduino micros() implementation - code construction and SREG
uint8_t oldSREG = SREG, t; is the same as: uint8_t oldSREG = SREG; uin8_t t; It just declares an object t of type uint8_t. EDIT: Question was edited, here is another answer: If your function restores SREG at its end and if your interrupt handlers are accessing SREG then oldSREG...
Can someone please explain this line
this basically increments through the available options on a standard US telephone keypad for the "3" key, looping back to the first option after the last is reached. it does so by referencing a 3-dimensional array containing the options for each key layed out as row/column/options. it is written in...
How to Inverse FFT in Arduino
The inverse FFT can be obtained by making use of the forward transform: for (int i = 0 ; i < 512 ; i += 2) { fft_input[i] = (fft_input[i] >> 8); fft_input[i+1] = -(fft_input[i+1] >> 8); } fft_reorder(); fft_run(); // For complex data, you would then need to negate...
Arduino LCD Space Invaders[Unsolved]
I have tried to simplify our code and fix your problem I can't test it, so I can't be sure everything is good I use byte instead of int for memory footprint consideration I have removed time and directly deal with the bullet position To be easier to understand I...
How to see library functions available in any Arduino library?
Let's say you want to know what SoftwareSerial.h provides. Search for it in Arduino directory, e.g.: C:\Program Files (x86)\Arduino. All public methods are at your disposal. This applies to already installed libraries into Arduino IDE: SoftwareSerial.h: #include <inttypes.h> #include <Stream.h> ......... ......... class SoftwareSerial : public Stream { private: //...
Arduino stk500_getsync(): not in sync
Do you push the "RESET" button when it starts uploading? Using the pro-mini probably you haven't connected the DTR pin, so it can't auto-reset the device (so you have to do it manually). When Arduino starts the uploading phase just press the reset button. It should start....
how to use standard c header files in arduino
You have to tell Arduino that your library uses C naming. You can use extern "C" directly in the Arduino code. The next code compiles in Arduino IDE 1.05. extern "C"{ #include <mycLib.h> } void setup() { mycLibInit(0); } void loop() { } mycLib.h #ifndef _MY_C_LIB_h #define _MY_C_LIB_h typedef struct...
I2C communication between pic32 and MPL3115A2 Altitude/Pressure Sensor
You should look at Freescale's app note AN4481, which is referred to by the datasheet. Page 5 shows the single-byte read operation which is what you are doing, except that the register address write must not be followed by a STOP but instead uses a REPEATED-START. I'm not familiar with...
Converting int to binary in C / Arduino
You can print the binary value of an integer using the bitwise. As far as I am concerned, I'm using this kind of function to understand how it works : int main() { int nb = 10; int i = 31; while (i >= 0) { if ((nb >> i)...
Sending String from Processing to Arduino Not Working
The problem is the use of += in C += doesn't concat strings. You need to concatenate the char get from Serial.read() like here for example: Convert serial.read() into a useable string using Arduino?
Arduino data type confusion. Have string, need const char?
c,arduino,data-type-conversion
Convert the String into a char array first: size_t len = myString.length(); char buf[len+1]; // +1 for the trailing zero terminator myString.toCharArray(buf, len); and then you can pass buf: bool ok = network.write(header,buf,strlen(buf)); ...
How to RESET running code on Intel Galileo
Just add the following line to reset the sketch, without the inconvenience of a board reboot: system("./opt/cln/galileo/galileo_sketch_reset_script.sh"); ...
Arduino Serial commutation using visual studio c++
visual-c++,serial-port,arduino
I believe that you need to terminate the string that you put into the data buffer in each loop iteration: while ((n = port->ReadData(data, 256)) != -1) { data[n] = 0; printf("%s", data); } ...
Acessing/Adressing variables with strings and int in Arduino
There are a few issues with your code. First you can't get the value of a variable or a define by dynamically using a string that is the name of the variable. It doesn't work that way in C. The easiest approach is to use an array and then just...
How far should one take #ifdef statements for hardware flexibility [closed]
c,coding-style,arduino,embedded
You should create a Hardware Abstraction Layer (HAL). The code within the HAL encapsulates all the hardware specific differences. The higher level code that calls into the HAL should not be aware of any hardware specific differences because the HAL has abstracted those details into a more generic interface. Your...
Change input to a smaller range
int counter = 0; is the beginning and if (counter <= 9999) { defines the end. Change 0 for your choice of beginning and 9999 for your choice of ending. The code works because keyboard.press and keyboard.release accepts a character to select which key to press and release. It uses...
Arduino doesn't read a proper amount of bytes
c++,serial-port,arduino,usb,raspberry-pi
The issue you are experiencing lies in the actual timeline of events. When the RPi sends the data to the Arduino, remember that it is sending it serially, i.e. one character at a time. As soon as the first byte of data arrives at the Arduino, then Serial.available() will return...
Arduino Yun - how it's detected over the wifi
arduino,embedded-linux,arduino-ide,arduino-yun
The Yun uses Bonjour services (port 5353) for auto-discovery on a wireless network. For more information, look here.
How to force interrupt to restart main loop instead of resuming? (timing issue!)
The problem is here: previousMillis = 0; previousMillis2 = 0; previousMillis3 = 0; previousMillis4 = 0; All if statement will be true on the next loop. Try with: previousMillis = micros(); previousMillis2 = micros(); previousMillis3 = micros(); previousMillis4 = micros(); ...
Intel Edison UART1 cannot export gpio 214
c++,node.js,serial-port,arduino,intel-edison
It appears 115200 is an unusable baud for the Edison serial to Arduino block! I set the baud to 9600 and have successfully gotten the expected data. Additionally, the gpio pins for the Arduino block is 130 and 131. (130==rx, 131==tx) echo -n 130 > /sys/class/gpio/export //may not need, may...
Trouble connecting to ESP8266 NodeMCU Server
I know nothing about NodeMCU but that is not a proper http server. For it to properly work with a browser, it should return some headers. You can try to close the connection after sending the response. Try the following: wifi.setmode(wifi.STATION) wifi.sta.config("SSID", "password") wifi.sta.connect() srv = net.createServer(net.TCP) srv:listen(80,function(conn) conn:on("receive", function(conn,...
accessing range of values in arduino array
Arrays in C++ don't allow this syntax. What you should do is something like this: char[2] id; if( sx1272.packet_received.length > 5 ) { id[0] = sx1272.packet_received.data[4]; id[1] = sx1272.packet_received.data[5]; } ...
Issue to use a windows process in QT
Is avrdude in the path? If it is not you can call the setWorkingDirectory before executing the process or add it to the path. In order to check it, open the command line, cd into the binary folder of your Qt application and enter the command: avrdude -Cavrdude.conf.txt -v -v...
Is a network shield required to do POSTGET requests with arduino?
post,networking,get,arduino,nfc
You can't do it directly, but if you're planning to use USB, you can send data using the various serial commands to the PC you're connected to. You'll need a program written in your language of choice on the PC listening to the arduino and that program can submit...
Bizare class instantation in adafruit example
Technically, the first syntax creates a temporary object and uses that to copy construct the matrix object. The second syntax avoids the extra copy and constructs matrix directly. So your simplified syntax is better. However, a compiler would likely optimize the difference away, so that the resultant object code would...
Arduino 2006 how to connect to my laptop?
There's at least two options. First, it's set up to be programmed over Bluetooth. So if you have Bluetooth on your laptop, you can connect the two wirelessly. Pins 0 and 1, per the documentation, are TTL serial transmit and receive pins (which are also used for Bluetooth communications), so...
FT801 chip id error on Arduino
c,arduino,microcontroller,ftdi,intel-edison
May be when they tested the sample code, they used a chip whose ID was 10108 but on the actual board they are using the different chip. The guys said rightfully..You need to comment out that line to reject any chip ID checking mechanisms. Moreover you can also edit the...
warning: address of local variable 'buffer' returned [duplicate]
It is because you declare buffer on the stack. If you want to return a dynamically allocated buffer, use malloc: uint8_t *buffer = new uint8_t[length]; if (buffer == NULL) error_allocation; // Make sure to de-allocate after you finish to use it delete [] buffer; ...
the led didn't switch on
It looks like the problem is in the delay(5000) the micro-controller will wait 5 seconds between a sample of the button's state. if you remove the delay statement it should be on and off instantly. you should try to trigger the setRemoteState only on state change, so it will not...
controlling two dc motors and servo with arduino code
Several problems there. Let's start with the compilation errors: You have two functions turnLeft and two functions moveForward. I assume the second pair should be turnRight and moveBackwards. In the moveForward function you call servoRight(0) this should probably be servoRight.write(0). Fixing this should allow your code to compile, but it...
Arduino NANO - not showing in device manager
The Arduino clone device you have linked to uses the CH340 chip as its USB serial adapter. You need to obtain the drivers from the Chinese manufacturer or some other site. There are a number of blogs that provide information about using these clones (example). Provided the driver is installed...
Not sure if programmer or ATMega is burned
arduino,microcontroller,arduino-uno,atmega
For Anyone with the same problem. Somebody answered my question on another Stack Exchange. It is here. Also this video may be helpful. It sure was to me. Basically you need another arduino, then you need to upload a ArduinoISD sketch(which is built in Arduino IDE) to it, and connect...
Function declared in .ino not found
As I said in a comment, the langage de prédilection for Arduino is C++, not C. So is seems a good idea to comply to the C++ way of structuring your applications. Forget the C way which often consists of workarounds for the lack of adequate mechanisms for clean programming...
Code to run Attiny85 with WS2812 integrated with RGB LED
Hi all thank you very much for the help. I've ended up fixing it. See below: " The memory was okay. I think you were right that the clock speeds are different for the arduino and the attiny. I ended up using the libraries found here: https://github.com/cpldcpu/light_ws2812 Then I loaded...
A newbie and the timer module that doesn't compile
In Timer.h you have: TimerAction* actions; At the point in time that the compiler sees that line of code it has not seen what a TimerAction is. As such it does not know what the type is and is giving you an error. What you need to do is forward...
Arduino Esplora Pong Game
So following @PaulOgilvie's idea I fixed the problem with the following code: if (BPY >= 160 || BPY <= 0) {//Goal Detection if (BPY >= 160) { playerScore = playerScore + 1; } else { computerScore = computerScore + 1; } DrawCourt(0); EsploraTFT.fillCircle(BPX, BPY, 7, ST7735_BLACK); EsploraTFT.fillRect(computerPaddle, 154, 32, 3,...
Linear equation solver Arduino,printing wrong answers
c,matrix,arduino,calculator,linear-algebra
It's a floating point error, the final value you are getting is very close to zero. Demo. Add a small epsilon value to your final test to allow for floating point inaccuracies: if(fabs(a[cant-1][cant-1]) < 0.000001){ lcd.print("No solucion"); /* if there is no solution print this*/ ...
Verifying Arduino Due with arm-none-eabi-g++
If you go into File->Preferences in the Arduino IDE, you can turn on Verbose Output During Compilation. This will show you exactly what is going on in the log window....
Close serial port issue in Java
java,serial-port,arduino,gnu,rxtx
I have not found any solution for closing serial port of rxtx package in windows 8.1 environment, I moved therefore to JSSC package and it works much better, the full solution including closing port and event listener can be found here. JSSC solution...
Arduino struct does not name a type error
You can read here about the build process of the Arduino IDE. Before it can be compiled, your sketch needs to be transformed into a valid C++ file. Part of this transformation is to create function defitions for all your function declarations. These definitions are put in the top of...
Call function on lcd object in class
lcd is a pointer lcd.init(); lcd.clear(); lcd.print("Constructor"); Above lines should correct as follows: lcd->init(); lcd->clear(); lcd->print("Constructor"); ...
Reading a character and integer command from radio in order to execute a function.
data,arduino,radio,packet,eeprom
If I understand you correctly, you are attempting to read in commands from Serial, and if you encounter the 'C' command, you expect an integer value (0-512) to follow. You will need to read the integer value in. Here's one way: cmd = Serial.read(); if(cmd == 'C') { int packetNum...
implicit declaration of function even though i have included the file?
I see, that your header file, which contains declaration of init_phase_correct() is wrapped with include guard with some auto-generated name (INCFILE1_H_). Also, you did not specify, whether init_phase_correct() is declared inside PWM.h or maybe another file, that is included by PWM.h. Without more code, I cannot say for sure, but...
Send data from Arduino to server
arduino,arduino-uno,arduino-ide
a very simple way to achieve this is to use breakoutjs download and install, and upload the firmata sample to the arduino. You'll have to right some JavaScript code that will take care of sending requests to the distant server.
Read serial input until control char indicates end of message
The receive block is a pretty low level function, so it will not be able to do such a specialized thing. State in Elixir is explicit, and can be implemented through an optional argument, the accumulator (acc in this case). You can later pass down the accumulated value to the...
SeeedStudio CAN bus shield arduino ECU_Request
You only check one message, but there are many different messages on the bus, regardless of what you send. You should either read every message until you get the one with the CAN ID you expect (probably CAN ID 0x7e8) or set an appropriate filter/mask in the MCP chip, so...
arduino find text in webpage
A very easy way to get the data you want is with TextFinder from the Arduino playground. I believe this should work. Note that I haven't tested it, so fingers crossed. Add this at the begining #include <TextFinder.h> #include <String.h> String result = ""; TextFinder finder( client ); Then modify...
arduino sequential lighting
You could try using a state variable. Declare a boolean variable such as: boolean runSequence = false; Now, when you detect a button press, just toggle the state: // Replace this condition to whatever matches your button setup if ( digitalRead(pin) == HIGH ) { runSequence = !runSequence; } Then,...
Arduino Libraries documentation with all methods / functions
The short answer is that if it isn't an official arduino library it falls on the shoulders of the developer to write the documentation page for that library (for example the Adafruit neo pixel) For more advance features and libraries try looking here...
Unexpected behavior in my RGB-strip driver code
First, in setup: pinMode(buttonPin , INPUT); Second, what are you expected when setting==3? You aren't reloading/updating the variables for brightR brightG brightB. So, when you change setting, you will lost the change of brightness...
How to get temperature value from DS18B20 voltage
controller,arduino,hardware,sensor,temperature
You need to connect the 18B20 to a microcontroller, or a 1-wire host controller, connected to the microcontroller. (The difference is whether you want to write your own 1-wire protocol code ... go with the host controller). You'll get a digital value for the temp, no ADC required.
simple communication between AtTiny85 and Arduino (I2C)
I finally found my mistake: when I do: Wire.write(0); I forgot to start the transmission with: Wire.beginTransmission(device);
Arduino int to String conversion
I made a test println() statement to print the value of c, and found that its value when BTLEserial.read() is 0000 turns out to be 48. Hardly surprising. The ASCII value of "0" is 48. The "int" that Adafruit_BLE_UART::read() returns is the most recent byte received; if you want...
Xbee recieve packet 64 bit address is wrong?
Your XBee module is configured for escaped API mode (ATAP=2), which replaces the bytes 0x7D, 0x7E, 0x11 and 0x13 with 0x7D and the escaped character XORed with 0x20. Set ATAP=1 and you'll start seeing the expected bytes. Digi has a good Knowledge Base document explaining the escaped mode....
Serial Communication between Arduino and Python, issue of using hexidecimal values
python,arduino,pyserial,serial-communication
its not hard here is a simple example, its usually a good idea to start simple and then increase the functionality to what you want. test_serial.py import serial ser = serial.Serial("COM4",timeout=5) # everything else is default ser.write("\x45") print "RECIEVED BACK:",repr(ser.read(5000)) test_serial.ino int incomingByte = 0; // for incoming serial data...
Undeclared Scope (Switch Statement in Arduino)
"direction1" has not been declared anywhere in the code you pasted. Somewhere there needs to be a line of the form type direction1; for example char *direction1; or int direction1; to tell the compiler what direction1 is. The other 3 errors indicate those lines are missing semicolons at the end....
Disturbed digital out at 4Mhz on Arduino NANO
I've posted this question on arduino.stackexchange.com and it got an answer: http://arduino.stackexchange.com/questions/11821/disturbed-digital-out-at-4mhz-on-arduino-nano/11830...
C# Calling a .ino File
There is a way. It is called Serial Communication. You don't communicate with the .ino file. You communicate with Arduino using the COM port which sends and receives bytes with Arduino through USB. On Unity Editor, go to Edit/Project Settings/Player and change the .Net setting to .Net 2.0 instead of...
Is it possible to use my PC's fingerprint in C#?
testing,arduino,software-design,fingerprint,biometrics
The short answer is yes. The long answer is you will need a lot of things to do so. The first is you will need to find out which fingerprint scanner you have in your laptop. Then you will need to find out what SDK's that device manufacturer offers. Most...
Arduino Sublime Text 2. I can compile but can't upload. Error “The system cannot find the file specified”
c++,upload,arduino,sublimetext2
The problem is that the Arduino plugin is 1) ancient, 2) (barely) ported from a TextMate .tmBundle, and 3) only works on OS X. All of the commands rely on programs stored in /Applications/Arduino.app, which you obviously don't have on your Windows system. So, instead of using this plugin, you...
Pointers in Arduino, not updating outside variable
The problem is that pointers and post-increment does not do what you want. If you write void someFunc(int *a, int *b) { *a = *a+1; *b = *b+1; } it works See ++ on a dereferenced pointer in C? for an explanation of why *a++ increments the pointer itself....
Program help on Arduino Uno
Arduino UNO maximum integer value is 32767 (16-bit signed integer). So both watertime and waittime are too large to store in int variables. Try slowing the timebase by using delay(1000) to control a loop that runs once every second, then express watertime and waittime using seconds instead of miliseconds. Incidentally,...
Binary reader with arduino blinking 8 leds
Basically you could do something like: int myPins[] = {2, 3, 4, 5, 6, 7, 8, 9}; byte sequence[] = {B01001001,B00000001,B00000011}; void setup(){ for(int i = 0; i < 8; i++){ pinMode(myPins[i], OUTPUT); } } void loop(){ for(int i = 0; i < 3; i++){ turnOnOff(sequence[i]); delay(500); //just to see...
python and arduino : list index out of range err
Others have tried to answer the question - but I think the basic confusion is not resolved line[:-5] will remove last 5 characters from a line For example if your line is 'abcdefghijklm' then line[:-5] would give 'abcdefgh'. Now let's look at your adruino code specifically following line Serial.print(id_lum) Now...
Arduino Adafruit NeoMatrix library
The -36 defines the maximum displacement based on font width, screen width and text length. The standard font of Adafruit_GFX is 6px per character. You need this cursor value to render the font characters correctly. Variables you need... char exampleText[32] = "This is a test"; int pixelPerChar = 6; int...