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Questions tagged [arduino-micro]

A microcontroller board based on the ATmega32u4 with built-in USB communication.

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22 views

How to fetch the com port or any id I can use to upload specific program to a specific arduino? e.g. “a.ino” to arduino micro

My project is a head mouse for which I am using two arduino boards . I want to upload a specific program to a specific arduino. How can I do it? And if I need to use a pid or com port id about which ...
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31 views

MPU-6050 showing all -1s

I am following this tutorial and have an MPU-6050 connected to an Arduino Micro with the following connections VCC - 5V/3.3V GND - GND SDA - A2 SCL - A3 I'm trying to run the short example ...
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1answer
26 views

Micro does not recognised as HID device

Being a completely noob with Arduino (but not with coding tho) I'm trying to create a simple buttonbox with Micro unit. For now I can not figure out what should I do to make my Windows 10 recognize ...
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2answers
47 views

Arduino Micro & Thin polymer lithium batteries [closed]

Is this battery: Polymer Lithium-ion Battery Model Number: PGEB014461 https://www.powerstream.com/p/PGEB014461.pdf Producing enough energy to power the following Arduino-micro project: ...
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1answer
81 views

Software I2C - sending data

I'm trying to read a voltage in from a power supply to an Arduino Micro, then send it to an oscilloscope through an I2C (MCP4725). I would use the default pins on the Micro but I want to wire three ...
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1answer
81 views

analogRead() output oscillates even though the pin is grounded

I'm using Arduino Micro to read from 5 flex sensors and display the corresponding angles to the Serial monitor. I am currently having quite some problems with the oscillating values I am getting from ...
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0answers
21 views

Possible to live-control an Arduino microcontroller from any Linux IoT board?

I'm working on a home project that centers around a non-Arduino Ubuntu IoT board but I'd like to add an ATmega32U4 chip for USB HID. I'm thinking about using an Arduino Micro. The signals to the ...
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1answer
37 views

Help with Arduino Micro Keypress Algorithm

Greeting, first time Arduino user here. So I am using the Arduino Micro as an HID keyboard device. It accepts arbitrary input from a Node-JavaScript program I am running (so I have full freedom in in ...
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2answers
64 views

Using Pro Micro without soldering pin

I'm a total newbie. I bought a Pro Micro but I didn't know that it can't be used, if you don't solder things in his holes. I found this picture on Google: And it seems that exists those stuffs (green ...
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1answer
164 views

Send big amouts of data to PHP script via gsm module SIM800L

I'm looking for a way to get lots of sensory data from my Arduino Micro to a PHP script. My current attempt is using the following AT-commands: Sent: [AT+HTTPPARA=URL,www.example.com/newData.php?data=...
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18 views

Arduino Micro behaves unusual

For a few days I'm trying things around on my Arduino Micro. At first uploading was working just fine. Here and there you had to press the reset button. But now if I plug it in no COM-port shows up. ...
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1answer
37 views

SIM800l doesn't respond on arduino micro

I want my Arduino Micro to interact with my SIM 800 L module. But unfortunately nothing happens, may you can help me figure out where I made a mistake. Here's my wiring: Summary of my wiring: ...
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1answer
51 views

Brushed ESC won't move slowly [closed]

I'm trying to control the brushed motor in a Traxxas Slash RC car with the built-in XL5 ESC using the Servo library on Arduino. I previously had success controlling this car with a Pololu Micro ...
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1answer
63 views

Maintaining time in Arduino

I am working on development of alarm clock using Arduino. No doubt RTC will be the best but it increases the Price of the project. Also I opened a digital clock (which I purchased online) and I see ...
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1answer
124 views

Unexpected negative values from abs() function inline with analogRead

When sampling from A0 with a 0-5V signal on an arduino micro with the code below I get some negative values. int sensor = 0; sensor = abs(analogRead(A0) - 512); Values: 77 25 -74 -58 46 113 -74 102 ...
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0answers
58 views

AC dimmer not smooth dimming

I am trying to create a phase control AC dimmer. But I am not able to achieve smooth dimming. I am using this guide for the circuit: Link On the zero detection part I am able to detect its zero ...
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2answers
37 views

Emit region-neutral keyboard signals

The Keyboard API allows the Arduino boards such as the Micro or Leonardo to emit USB signals mimicking a physical keyboard. However, the signal seems to transmit key strokes and not characters which ...
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1answer
96 views

Arduino IDE can't program my Arduino Pro Micro

I have a lot of Arduino Pro Micros that I can't program through the Arduino IDE. I'm on Windows. I'm using the SparkFun Pro Micro board information downloaded from SparkFun's website. I've tried ...
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2answers
153 views

Distance measuring utilizing (1 or 2) Arduino Nano's

I would like to develop a small-distance measuring device that will be primarily used in indoor scenarios to measure a distance with cm accuracy (mm if possible). The device would be in a small form ...
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1answer
27 views

Arduino Comms disrupted, prevents program loading (catch 22)

I have written some software which, when loaded onto an Arduino Micro, blocks communications for some reason. Lets stipulate that there is something wrong with it. Using the Ardiono IDE on Windows 10,...
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2answers
55 views

Is Arduino Keyboard in Single User Mode Possible?

Has anyone had success using the keyboard functionality of any arduino in single user mode of mac computers? I would like to inject keystrokes in single user mode, and have been unsuccessful with the ...
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1answer
73 views

What is the smallest duration that can be measured using micros()? [closed]

What is the least value of time that I could measure(count) using micros()?
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1answer
432 views

Caluclate lux value from LDR

I am using an LDR (Iduino SE012) to measure light. It returns a 10-bit value of the incoming voltage and I don't know how to convert this into lux, lumen candela or any other light-intensity unit. I ...
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1answer
185 views

Use lowpower-libary and still use serial connection and other things

I managed to get the LowPower libary working on my Arduino Micro. This code works perfectly: #include <LowPower.h> void setup() { // initialize digital pin LED_BUILTIN as an output. ...
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1answer
148 views

“Active LOW” relay board Pin configuration [duplicate]

I bought a 5 V Relay Board: LINK (Aliexpress) and just realised it's "Active LOW". I want to control a water pump via a Arduino Micro. I tested it and as far as i understand the workings of this ...
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1answer
59 views

Arduino Micro interference between analog inputs

I'm building a MIDI controller with the Arduino Micro, hooking a bunch of knobs up to the analog inputs. Currently, I'm getting analog in 9 being influenced by analog in 10: analogRead(9) returns a ...
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1answer
283 views

Sound localization using two mics,arduino uno on matlab

I have been trying to achieve this for a long time using the ITD method and have gone through various articles on the net. I want to know if its possible to actually achieve sound localization using ...
2
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1answer
580 views

Pro Micro recognised as Micro (win10, IDE 1.8.1)

I just got this pro-micro clone 5V and it's my first pro micro ever. After reading lots of discussions about how easy it is to brick and how it's just a smaller Leonardo, I've also found tutorials ...
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0answers
34 views

problem with communication between Linux and microcontroller [closed]

Hello Arduino community, I am new to the Arduino community and would like to ask for help (I work on a Arduino TIAN). Indeed, since 2 3 weeks I try through simple programs to understand the operation ...
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2answers
994 views

Decreasing Arduino pro micro power consumption

I'm working on a project that involves sending GPS coordinates wirelessly from an arduino board to another one. I was thinking of using an arduino micro for this task. The problem is that I want it to ...
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2answers
844 views

Using INT2/3 on Arduino Micro (Atmega32u4)

My project is using almost all the pins on this board and I require an interrupt pin to read radio state (rather than polling). I'm using I2C, so that leaves INT2 and INT3, which are the TX and RX ...
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4answers
5k views

How can Arduino's 8 bit Microcontrollers handle C++

I have just started getting into Arduino and c++ programming! For all the talk on the internet about c++ being incompatible with 8-bit and even 16-bit microcontrollers, how is it that Arduino ...
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1answer
357 views

Arduino keypad and RF 433MHz transmitter problem

So, the basic idea is that user presses a key on keypad, and key that is pressed is sent with RF transmitter. I got individual parts to work(keypad and transmitter), but can't send the actual key. ...
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261 views

Is my Arduino Micro bricked?

A few weeks ago I built my own Arduino Micro. Everything worked fine and it connects every time. I have built a second one, with the exact same processor schematic as the first one. It turns on, and I ...
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1answer
252 views

Trying to read from AD5934 using Arduino on I2C

I'm trying to read a block of bytes from an AD5934 Impedance converter (PDF) using I2C. This is my code so far Preamble: #define AD5934_Address 0xD #define AD5934_Start_Frequency ...
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1answer
1k views

Arduino force feedback vibration gamepad

I'm projecting a gamepad with Arduino Micro. I'm using the Arduino Joystick Library. I'm building this gamepad for racing games so I need to catch signal like hit_the_wall, hit_another_car. I wonder ...
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2answers
111 views

How to send message from one embedded system to another embedded system like in cars, from one car to another? [closed]

I want to send message from one embedded system to another embedded system, like from one car to another without using phone number. just turn on the wifi.. connect and send message. There are ways to ...
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0answers
433 views

Arduino PWM multiple RGB LEDs

I want to control 61 SMD 3528 RGB LEDs (KT-SMD3528-RGB) with 3 arduino Micro's 3 PWM pins. I learned from reading up that I'll have to use 3 NPN Transistors to control RGB LEDs and external power ...
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1answer
45 views

Do I need a relay to control a monitor's power with an Arduino?

I'm trying to use an Arduino to switch a monitor's power on and off. I'm going to wire the Arduino to the monitor's power switch. I've tested the power switch with a multimeter, and when pressed, ...
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1answer
381 views

How to connect capacitive touch sensor to Arduino?

The capacitive touch sensor has 3 pinouts: Vin, GND, and OUT and emits an active high signal when the pad is touched. I should be routing the OUT pin to any one of the digital input pins on my Arduino ...
0
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1answer
894 views

Arduino Micro serial communication is not working after wake from power down

I'm trying to use the power down state for a battery application, but I'm having issues with the serial communication. I'm using the lowpower.h library to put the Arduino Micro into power down mode. ...
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1answer
234 views

PWM on Pin 4 - arduino Micro

I am using Arduino Micro. Is there any way to use PWM on pin 4 instead of Pin3 ? I tried to change pins_Arduino.h but didnt worked. //#define digitalPinHasPWM(p) ((p) == 3 || (p) == 5 || (p) ...
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0answers
266 views

Triggering actions in Android smartphone via Bluetooth from Arduino

Am working on a wearable using Arduino Micro and I am thinking it would be cool if I can trigger some events in my smartphone using Arduino. Say for example a button press in my wearable should ...
2
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1answer
902 views

Yet another display 16x2 not working with arduino

I found hundreds of questions about display not working with arduino. However, no matter how trivial this looks like I am having the same problem I cannot understand by reading the other posts. I ...
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1answer
91 views

Arduino Micro disappears on osX 10.11.6

so I have an arduino micro, and it was working fine until the latest security update for OSX 10.11.6 now the port won't show up in the arduino IDE. This doesn't seem to be a problem with the Uno / ...
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1answer
4k views

Arduino Pro Micro not recognised by computer or showing up in ports

Around 4 days ago my Arduino Pro Micro arrived. I've been messing around with it, using it to run keyboard commands on a computer. Just recently, whenever I plug it in to the computer it isn't ...
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1answer
109 views

Arduino Micro not providing regulated power

I have an arduino micro that works fine off USB. I need to power it from an external 12V power supply. When I connect the 12V supply to the adjacent VIN and GND pins, the arduino will not power up. ...
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3answers
351 views

Weird issue with software serial?

Hi i am trying to write a library to communicate between the arduino and the esp 8266. I wrote a command that that sends an AT command to the esp chip. So far I have tested these commands : AT, AT+GMR,...
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2answers
102 views

Why is the T2 transistor used in Arduino Micro?

I was about to design a small custom board using ATmega32U4, replicating the Arduino Micro. I know that T1 is used to block VUSB when VIN is connected. But why T2? The gate is 5V, so it will be ...
0
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1answer
322 views

Which Timer can I use on the Arduino/Genuino Micro?

I'm trying to implement charlieplexing with bit angle modulation on my Arduino Micro, and for that I need to use the internal timers. Which timers of the Atmega32u4 are unused by the standard ...