How to build a server-client type network in Arduino?
I have no experience with Arduino or microcontrollers at all. One of the requirements for one of our college courses is that we construct a microcontroller project. For our project, we were thinking...
View ArticleFunction parameter with type but no ~~symbol~~ identifier?
Recently this surprised me void myFunction(int OK, int) { Serial.println(OK); } void setup() { Serial.begin(115200); Serial.print("Hello World "); myFunction(42, 777); } void loop() {} It compiles...
View ArticleControlling large number of 24VDC lights / switches with Arduino
I am working on a movie prop that will be a simulated spaceship control panel. We are using an old control panel from a Boeing aircraft and would like to control all of the existing lights and read...
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GSM SIM800l not responding
Hello there, can someone please guide me on how to make the GSM sim 800l respond. I have registered the device and it was able to send sms to mobile once but since then it is not even getting to read...
View ArticleSerial monitor VS oled screen
Hi all. I have a simple program that decodes morse code signals using a photodiode (I won't go into the electronics) and prints it to the serial monitor . It works perfectly fine so I tired adding a...
View ArticleBest NB-IoT Dev Kits availability
Hi, Please anyone tell me the best NB-IoT dev Kit. I want to design a NB-IoT network. Please tell me the shortest way to start with. I have selected some kits , but not sure which is better and how to...
View ArticleUNO R4 WiFi and display for Atmega328P board
Hello! Excuse me for the question, so basic: I'm a newbie on Arduino. I'm working on a project that needs to output some text on a display a bit larger than classic 0.91" or 1,.." you can easily find,...
View ArticleGhost files on 32G SD card
Hello, For some reason, my freshly-formatted 32G SD card seems to contain a lot of files, and I don't understand why. The card was formatted as FAT under MacOS, using a full-erase option that took...
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CNC Shield + Servomotor using Z+
Hello Community, I'm trying to connect a servomotor on Z+ pin of CNC Shield but is not working. I'm very new with arduino/cnc and I don't know what I'm doing wrong. I tried to find the answer on...
View ArticleError occurred while uploading sketch(timeout)
Sketch uses 662 bytes (0%) of program storage space. Maximum is 253952 bytes. Global variables use 9 bytes (0%) of dynamic memory, leaving 8183 bytes for local variables. Maximum is 8192 bytes....
View ArticleHelp me with my 1st project
good day. im currently working on my 1st project, it is a vendo machine. and i am having a hard time on it because my && operator is being skipped and also when inserting coins to the coinslot...
View ArticleIDE 1.8.6 broke when I ran a newer IDE
(I know I am supposed to post source, but my project is too large, and this is an IDE issue I believe.) Ok, bonehead move this evening. I went to open my project and selected the wrong IDE. I have...
View ArticleArduino 08 Extension - Reversing the lights
Hi all! I've been moving through the arduino projects slowly but surely, but I am now stuck on the last section of the 08 extension asking to reverse the lights upon a shake "Unlike an hourglass...
View ArticleAvoid multiple instances when declaring variables in classes
In my project I've got multiple classes that need time and a LCD display the class "Screen" which displays the time and date. the class "Menu" which allows you to change the time and date. When...
View ArticleBurn Bootloader to arduino R4 wifi (Renesas R7A4M1AB)
I have change the processor Renesas RA4M1 on my arduino R4 wifi. (the old processor was burn) I have the flash programmer E2-lite (renesas), but I d'ont have the HEX file to send to the RA4M1...
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LED BUTTON ALARM WITH DS3231 RTC Problem
Hello, I am a PHP web programmer, but I am a beginner studying Arduino. I would like to inquire about a problem with the following function that I am creating while looking for various references....
View ArticleUsing pin declaration with INPUT_PULLUP when working with PCF8574 expander
The laibrary allows following pin declaration when working with PCF8574 pcf8574.pinMode(P2, INPUT_PULLUP); For me that would indicate existance of built in pullup resistors in PCF8574 chip and I...
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Can't use nrf24l01+ with arduino
I have tried so many times but Its not working at all. Here are my codes and connections. Nano connection: CE 7 CSN 8 SCK 13 MOSI 11 MISO 12 Mega connection: CE 8 CSN 53 SCK 52 MOSI 51 MISO 50...
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Toggle on off help
byte digitOne[10]= {0x80, 0xF2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xF0, 0x00, 0x30}; // a=1 b=2 c=3 d=4 e=5 f=6 g=7 int tensdigit; int unitdigit; int counter=0; void setup(){ DDRD |= B11111110; DDRB |=...
View ArticleNeed help with Arduino and XBee communication for soil moisture sensor project
Hi everyone, I'm working on a project that involves two Arduino Uno boards, two XBee S2C modules, two SparkFun XBee shields, and a soil moisture sensor. My goal is to have one Arduino read the soil...
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