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Arduino : Recent Questions and Answers

Find answers to your questions about Arduino or help others by answering their Arduino questions.

Using an ATTiny85 and DigiKeyboard.h, can I detect when USB HID is connected?

I am building a project to send HID keystrokes to a computer with an ATTiny85. I want to detect when the USB communication is working, in order to turn on...

Asked on 01/04/2022 by Bobby Tables

0 answer

PIR motion sensor (HC-SR501) false results with NodeMCU

I have a PIR sensor which I use to detect the motion and turn ON and OFF the lights on the basis of it. I have PIR connected with...

Asked on 01/02/2022

4 answer

Arduino EPROM dumper with utility program in C

I am writing EPROM dumper with Arduino UNO and utility program in C and I am using Ubuntu 20.04. The Arduino sketch works fine, but I am having few problems...

Asked on 12/30/2021

0 answer

Ethernet Shield doesn't work at all

I connected corresponding pins of Arduino Nano and the Ethernet Shield, connected my computer to a router (the light indicated the connection) and Ethernet Shield to the same router. Nevertheless,...

Asked on 12/30/2021 by silencefog

0 answer

Creating an array, assigning a value to each indices, and assessing the array

I am trying to create an unassigned array of size 512 and then assigning a reading to each indices. I want to get the start time before and after the...

Asked on 12/28/2021 by Anthony Chan

1 answer

Problem with STM32 and SDFat lib on other SPI port

I am using STM32F103C8 and I am triing to compile a code with SDFat library. The problem is I need to use the second channel of the SPI1 (pins PB5,PB4,PB3,...

Asked on 12/28/2021 by LucasN

1 answer

Arduino split comma separated serial stream

I'm trying to read serial data into Arduino. I usually use a Serial to USB cable to connect to the hardware and is sending data like33,Z,35.0,F,1073741.824,I,0.0,0x6833,Z,35.0,F,1073741.824,I,0.0,0x6833,Z,35.0,F,1073741.824,I,0.0,0x68At 38400 bound rate....

Asked on 12/28/2021

1 answer

Sea level pressure for BMP280

I have a BMP280 and BMP180 pressure sensor and I have both of them connected via I²C to a ESP8266. For the BMP180, I can get the sea level air...

Asked on 12/28/2021

2 answer

Receive an array of characters using SIM900 module

I tried to receive an array of characters using SIM900, but I couldn't. I can receive just one character like 'G', but I want to receive a string "abcd". When...

Asked on 12/24/2021 by Reza Qasemi

2 answer

Using a template inside a class

I'm trying to use a template function, but I get an errorhome/guy/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld: sketch/emptyCode.ino.cpp.o: in function `startIOTservices()':/home/guy/Documents/git/Arduino/HomePi/emptyCode/emptyCode.ino:37: undefined reference to `void myTest::funcOne<bool>(bool)'/home/guy/.arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/2.5.0-4-b40a506/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld: sketch/emptyCode.ino.cpp.o: in function `setup':/home/guy/Documents/git/Arduino/HomePi/emptyCode/emptyCode.ino:70: undefined reference to `void...

Asked on 12/24/2021 by guyd

1 answer

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