Arduino newsletter

Top new questions this week:

How to interconnect multiple Arduinos with a Rpi to control home-lights/switches

While planning the lightning infrastructure (wall-switches and lights) of my new home (it's still under-construction) I choosed to go through the "automated route" way and due to my background (I'm an ...

arduino-mega ethernet modbus rs485

asked by Damiano Verzulli 2 votes answered by Nick Gammon 1 vote

avr-g++ (or avr-gcc) and LiquidCrystal library

I'm trying to run simple Hello World program from Arduino 1.6.5 (https://www.arduino.cc/en/Main/Software) from terminal. When I run it in Arduino IDE, it works good. When I'm trying to get it by ...

arduino-uno avrdude

asked by Cheshire Cat 2 votes answered by Nick Gammon 1 vote

How to use the eclipse arduino scope?

i am quite new to the arduino stuff. Got the Arduino IDE installed side by side with Ecplise. Using Eclipse with the Arduino plugin is working well for me, including the SerialMonitor. I am just ...

arduino-uno eclipse

asked by nouseforname 1 vote

Im looking for a way to Serially communicate with a multi mesh Arduino Slave Network

I have one PC running Visual Studio and a program that will be sending commands to Arduinos Via Serial "COM Ports". So in 11 MCU's "nano" I will have motor drivers L293D/L298N IC's while in other ...

serial softwareserial

asked by Frank's Desig'Nature 1 vote answered by Russell McMahon 2 votes

How can I get a unique address for all my Arduino boards while in RS485?

My attempt is to know how to identify the board I'll be sending parameters to in a serial connection like rs485. I'm asking because I will have about 11 or so mcu's as "Rx slaves" while my pc is the ...

serial rs485

asked by Frank's Desig'Nature 1 vote answered by Avamander 1 vote

How can I stop my Arduino UNO rev 3 from briefly turning on digital output pins on startup or reset?

I am using my Arduino UNO rev 3 to control other devices via the digital output pins. On startup or reset, I find that these pins are all briefly turned on (perhaps as part of a self test). This ...

arduino-uno digital

asked by Paul 1 vote answered by Nick Gammon 1 vote

Are there any Analog pins on the mega that can not be used as Digital?

I am using both Arduino nano and Arduino mega boards in my projects. I got a nasty surprise the other day when I learned that, on the nano, Analog pins 6 and 7 can not be used as digital pins. Are ...

arduino-mega pins analogread digital-in

asked by Hoytman 1 vote answered by Ignacio Vazquez-Abrams 3 votes

Greatest hits from previous weeks:

Counting pulses with interrupt

I have been trying to count pulses from a 12,500 Hz square wave to trigger an output. Here's the code I have so far. When the Arduino is reset it prints 315 to the serial over a 25 ms ...

interrupt

asked by Brandon Whosville 2 votes answered by Gerben 3 votes

Is my Arduino dead or is it just its processor?

I have a problem with my Arduino. I can't upload any sketches to it (it gives me the error avrdude: verification error; content mismatch), but the LEDs are still blinking. Do you think that the whole ...

arduino-uno uploading atmega328

asked by Trevör Anne Denise 12 votes answered by RedGrittyBrick 9 votes

Can you answer this?

Using USB on a Leonardo to receive data from PC

I am new to the Leonardo, having only used a duemilanove before, and I am interested in using it's USB capabilities for a project. Basically I need it to be an input and output device, communicating ...

arduino-leonardo usb

asked by BytesGuy 1 vote