Arduino newsletter

Top new questions this week:

Problem with Using an array inside a Switch Statement

I am having a problem when using a switch statement to check for something inside an array. I am using an int as my switch, then I compare the character arrays using strstr. So it reads like this: ...

arduino-due

asked by Andrew 1 vote answered by Kugan Kumar 0 votes

LCD 16x2 Blank Display

I am using the following wiring diagram from a tutorial. I need to follow this configuration because later tutorials build on this example. I have looked at other solutions, but they follow a ...

arduino-uno lcd

asked by Chiwda 1 vote answered by KIIV 0 votes

Changing the mode when pressing/holding down a buttton

and first of all sorry for my bad English. I am trying to program a code which allows the user to change between continuously or manual mode, but I am having some issues getting it to work. The goal ...

arduino-uno c++

asked by TRMN 1 vote answered by Roberto Lo Giacco 0 votes

Is it possible to power this 12V Wind Speed Sensor with a 5V battery?

I have a battery pack used to charge mobile phones. It's capacity is 13,000mAh and it has two output ports. Both are 5V but one is 1A and the other 2.1A It also has an Input port of 5V 1A. (To which I ...

power voltage-level

asked by John Petrak 1 vote answered by jwpat7 0 votes

How I can use multi sensor in one code in Arduino?

How I can use multi smoke sensor in one code? I mean how can I use more than one sensor, where both sensors has the same purpose, like use smoke sensor in multi room. Similar to this code where one is ...

arduino-uno programming

asked by Moosa Alismaili 1 vote answered by woo2 0 votes

How to correctly serve a webpage from an SD card

It's been days that I'm trying to figure it out how to edit this perfectly working code in order to load load a webpage from the sd card. #include <SPI.h> #include <Ethernet2.h> byte ...

shields ethernet sd-card http

asked by FabioEnne 1 vote

What are the logical errors in this piece of code?

The client always reply with "ThisCodeTurnsTheUnoOnn" or ThisCodeTurnsTheUnoOff" based on some conditions. This piece of code is inside arduino uno's void loop(). Expected behavior: The arduino ...

arduino-uno sensors esp8266 pins

asked by Kugan Kumar 1 vote answered by Majenko 1 vote

Greatest hits from previous weeks:

How can I run multiple programs on an Arduino?

I'm trying to get students to experiment with Arduino. However, due to a lack of boards, two teams of students will collaborate on each board. They will push their own code (independent from each ...

system-design networking

asked by Giulio Muscarello 2 votes answered by Anonymous Penguin 4 votes

Some dude named avr won't let me upload my program, aka "avrdude: stk500_getsync(): not in sync: resp=0x00"

I made an awesome program the other day, and I wanted to upload it to my Arduino. After clicking the upload button, some really mean dude named avr came along and stopped me. He told me: avrdude: ...

uploading avrdude

asked by The Guy with The Hat 48 votes answered by The Guy with The Hat 30 votes

Can you answer this?

How to attach Arduino MKR1000 to a shield meant for Arduino UNO?

I have an Arduino MKR1000 and need to interface it to an Adafruit Music Maker shield, which has pinouts for an Arduino UNO. Maybe I'll have to attach female headers, and then jumper pins over. Which ...

arduino-uno shields hardware adafruit mkr1000

asked by Doug Null 1 vote