Arduino newsletter

Top new questions this week:

Motor running slowly when connected to digital pins, but fine with 5V pins

I am trying to connect a Dagu DG01D motor to my Arduino Uno. First I tried connecting the black wire to GND and the red wire to digital pin 7. My code: void setup() { pinMode(7, OUTPUT); ...

arduino-uno motor

asked by Stack Overflown 3 votes answered by Ignacio Vazquez-Abrams 1 vote

Sending textual and nontextual data simultaneously across a serial port

I am currently using an Arduino Uno and creating an LCD simulator that works by sending LCD data through the hardware UART (serial interface). This LCD data is very short in length; in this case, it's ...

serial

asked by oldmud0 2 votes answered by jwpat7 1 vote

ATtiny serial.print() crash with INTs

I'm trying to print some data to and from an ATtiny85 via serial, using the SoftwareSerial library. So far I've tried these setups with no results: 1/8MHz clock baud rates from 9600 to 57600 ...

softwareserial attiny

asked by nxet 2 votes answered by KIIV 2 votes

Water level Detection using Ultrasonic Sensor and arduino

I'm making a water level detector to control my motor which supplies water in water tank and for that I'm going to use ultrasonic sensor to be attached to tank lid. My question is whether the vapor ...

sensors

asked by Pankaj Patil 2 votes answered by mindcrime 1 vote

Wrong microcontroller found on Arduino Leonardo

When I try to upload a sketch on this brand new Arduino Leonardo, I get this error: Arduino: 1.6.11 (Linux), Board: "Arduino Leonardo" Sketch uses 4,134 bytes (14%) of program storage space. Maximum ...

arduino-leonardo

asked by Riccardo Cagnasso 2 votes

Crosspack instead of Arduino IDE, how to include Arduino.h

I quit using the Arduino IDE, instead I am now using Crosspack via the command line on my Mac. It is working totally fine. I use "make" to compile it, "make flash" to upload it to the Arduino. This ...

arduino-uno arduino-ide library

asked by JeroenJK 2 votes answered by Majenko 2 votes

Help avoiding floating point math

I'm using a Texas Instruments DRV2605 haptic controller in my project to drive a LRA vibration motor. I would like to calculate the LRA rated voltage during run time using the formula below as ...

memory-usage variables code-optimization float mathematics

asked by JvwComputing 1 vote answered by Majenko 1 vote

Greatest hits from previous weeks:

Send AT commands to esp8266 from Arduino Uno via a SoftwareSerial port

GOAL From Arduino UNO, send AT commands to esp8266 via a SoftwareSerial port and receive results. CURRENT STATUS I either send AT commands and get nothing back (wiring scheme 1) or I send AT ...

arduino-uno esp8266 softwareserial

asked by Paul 2 votes answered by Grant 4 votes

Why is my LCD 16*2 is not displaying any characters, although all the wiring is correct?

Recently I have linked up a typical 16*2 LCD (Liquid Crystal Display) display to my Arduino Uno and have linked all the pins up. Here is my connection:(LCD pin first) 1=GND, 2=+5v, 4=11, 6=12, 11=5, ...

arduino-uno programming pins lcd

asked by Stratmoss 2 votes answered by PhillyNJ 5 votes

Can you answer these?

RF24 - Split data in payloads at sender and then rebuild on receiving end

I'm trying to send some data using nRF24L01+ transceivers, but I need to use 8 byte payloads for reliability. The data I'm sending is much bigger than that, so I need to split it into 8 byte packets ...

nrf24l01+ array

asked by Christian Rodriguez 1 vote

Arduino Mega 2560 from .org- which IDE works?

My personal choice is to purchase from the .cc (or adafruit) for new boards. YMMV. Craigslist locally of course has generic and .org boards now and then. If I get a .org board on craigslist, will I ...

arduino-mega ide

asked by TooManyHandles 1 vote

Arduino Due works perfectly on Windows but doesn't on Linux (SAM-BA operation failed)

I've been working with the Arduino Due for a project, we have been setting up these Arduinos with an ARM Board that hosts a Linux System with Busybox that connects to the Arduino. Recently I got ...

arduino-due linux bossa

asked by P.Caravello 1 vote