Arduino Stack Exchange
Arduino Stack Exchange

Most Popular

more tags
1500 questions
4
votes
3 answers

Multiple Buttons on Single Analog Pin and Trigger Pin Arduino Uno

I've researched how to attach multiple buttons to a single analog input using a resistor network. Instructables has a good lesson on this: http://www.instructables.com/id/How-to-access-5-buttons-through-1-Arduino-input/?ALLSTEPS My requirement is…
hagope
  • 161
  • 1
  • 5
4
votes
4 answers

Arduino Uno 3: Stuck at 'uploading...' sketches

I was playing around with my Arduino Uno R3 board with Sublime Text 2 & 'Stino' as IDE I am not sure if it is my code is the problem or if I broke something... I pressed upload while another sketch didn't finish uploading, even the original Arduino…
robertgzr
  • 43
  • 1
  • 1
  • 4
4
votes
1 answer

Is it possible to extend the reach of a PN532 NFC/RFID shield?

I am working off an Arduino Uno with an AdaFruit PN532 NFC/RFID shield. The goal is to have a shoe box, with a false bottom. Under that false bottom would be my prototype, which I hope will be able to detect any MIFARE tag that is in the box, above…
erik
  • 181
  • 4
4
votes
1 answer

Maximum Delay time

I am designing a driver for a Bipolar stepper motor using Arduino Mega 2560 and DRV8825 Stepper driver. In my application, a stepper motor (Nema 24) will run for 5 minutes and stop for 2 minutes. I have doubts about is what is the maximum time an…
CNA
  • 141
  • 1
  • 4
4
votes
4 answers

Is the ShiftOut tutorial on the official Arduino website really wrong regarding the capacitor?

I'm talking about this tutorial "Serial to Parallel Shifting-Out with a 74HC595" from the official Arduino website. It provides the following schematic: I've read a couple of times now, that the placement of the capacitor is wrong: This is a well…
Liam
  • 77
  • 1
  • 10
4
votes
1 answer

Compatibility between shields

Despite that I am new to Arduino, I am tasked to invent a serious alarm system and I chose Arduino. I study electronics, but virtually I am a software programmer and C is my area of expertise. I ordered the parts I think I will need and the time is…
Edenia
  • 369
  • 2
  • 7
4
votes
2 answers

How to fix: Invalid conversion from 'const char*' to 'char*' [-fpermissive]

I'm trying to upload the code from here to work with an ESP8266. So I copy/pasted the code to the Arduino IDE and I get this error: C:\Program Files (x86)\Arduino\libraries\WiFi\src/WiFi.h:79:9: error: initializing argument 1 of 'int…
Physther
  • 207
  • 2
  • 4
  • 8
4
votes
0 answers

How do I interpret the esp8266 "boot mode" message?

Everytime the chips resets, we get the reason and the next boot mode. ets Jan 8 2013,rst cause:XXX, boot mode:(YYY,ZZZ) For XXX we can check the meaning here. For YYY and ZZZ I am not sure but I know it has something to do with this. I think YYY…
nemewsys
  • 225
  • 1
  • 5
  • 13
4
votes
1 answer

Wi-Fi module 5 GHz

What is a Wi-Fi module for an Arduino that works on 5 GHz? The ESP8266 - doesn't support 5 GHz according to: Re: 802.11AC 5GHz Why can't ESP8266 operate in 5 GHz since 802.11N is supported my own experiments.
Hryhorii Liashenko
  • 141
  • 1
  • 1
  • 2
4
votes
2 answers

How to pass variables to custom callback functions

I want to use the Ticker library of the ESP8266 Arduino core to (asynchronously) delay the switch of a pin to a desired state like below. I am not sure about the "here is" function definitions and I am having a hard time to find some documentation.…
milkpirate
  • 143
  • 1
  • 4
4
votes
5 answers

PCA9685: how "unset" PWM signal?

I use my Arduino with Adafruit PCA9685 servo controller. To set PWM signals I use the provided library: https://github.com/adafruit/Adafruit-PWM-Servo-Driver-Library It allows easily set PMM signal and works good. But how can I "unset" PWM signal…
Sergey Kravchenko
  • 151
  • 4
4
votes
1 answer

ATTiny85 Interrupt id vs pin when programming with Arduino

I am using an Arduino Uno with the Arduino as ISP sketch to program an ATtiny85. I followed this tutorial to set up to program the ATtiny, and successfully got it to run Blink and an interrupt-free version of my program. I then added an interrupt…
Marsh
  • 288
  • 2
  • 5
  • 13
4
votes
3 answers

Arduino Due - creating an 8Mhz clock signal

I am attempting to interface a OV7670 camera to an arduino Due. (I am fairly new to this although have been programming for many years). I need to generate a clock signal for the camera at a minimum of 8Mhz - I realise using the pre-scalers I can…
Triumph Rider
  • 41
  • 1
  • 3
4
votes
2 answers

Avoid a Pro Micro waking up a PC?

I have an Arduino Pro Micro mimicking as a HID, connected to a PC. The PC BIOS is configured to wake from keyboard events - it is switched on by hitting a key on the regular keyboard. This is a wanted feature and should stay. Unfortunately, it also…
AnoE
  • 141
  • 2
4
votes
1 answer

Humidity sensor for wet environment

I've had a bit of experience with DHT11/DHT22 sensors in a greenhouse environment, and believe that when they get wet they stop working altogether. Are there any low cost humidity sensors that I can hook up to an Arduino that don't suffer from this…
davidgo
  • 175
  • 1
  • 2
  • 6
1 2 3
…
99 100