Questions tagged [arduino-mini]

A small microcontroller board based on the ATmega168 or ATmega328 chip. Use this tag for questions specifically regarding the Mini, and not just general Arduino usage.

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How can I use a LCD I2C and a RTC3231 on a Arduino Pro Mini?

On a small project, I have a DS3231 RTC module and a LCD I2C module that I'm trying to connect on a Arduino Pro Mini board. However, both the RTC and LCD require connecting the SDA and SCL to the pins ...
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3 votes
0 answers
56 views

Can not burn arduino pro mini 8 MHz bootloader with usbasp

I am using schematic of Arduino Pro mini 3.3v/8 MHz version. Please see below circuit diagram I built. Power supply to circuit is 3.3V. I have a USB ASP programmer which I used in previous version of ...
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-1 votes
1 answer
30 views

Synchronizing an internal frequency to an external one

In this question: Procedure for changing frequency of Nano or similar, @EdgarBonet gave a very nice method of generating timings that don't divide the system clock evenly. He also said that it would ...
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  • 221
1 vote
0 answers
46 views

Windows Driver for Arduino error code 22

I'm trying to use avrdude to load an Arduino program with the console, but I have a Windows 7 x86 Professional with Service Pack 1 (old PC). When I install the Arduino driver that comes with the IDE ...
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1 vote
3 answers
225 views

Arduino Pro Mini PWM issue

I want to create a small LED strip driver/controller with 2 channels (Cold/Warm white) using Arduino Pro Mini (5V/16MHz). I have connected the parts per the following diagram I have pins 5 and 6 ...
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0 votes
0 answers
61 views

Battery depleting on second prototype

I am working on a project which uses two 18650 3400ma batteries to power some sensors, an Arduino Mini Pro, an 433mhz RF transmitter and an ESP8266-01. Most of the time the Arduino is in sleep mode ...
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-1 votes
2 answers
984 views

SIM7600 A-H not responding directly when connected through pins

I am working on a project which utilizes three components: Arudino Pro Mini(5v) Breakout SIM7600 A-H from AND technologies 9V Battery (connected to RAW and GND on the Arduino board) I am trying to ...
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1 vote
1 answer
99 views

Communication with sensor KMX63 in I2C

I trying to use a new sensor the KMX63 with a Arduino Uno board, my sensor is on a evaluation board made by kionix. For the connexion il linked as follows: | Pin Uno | Pin evaluation board | | A5 | 5 |...
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1 vote
0 answers
378 views

Arduino Mini and USB2Serial not uploading sketch

I am trying to upload my sketch to an Arduino Mini Pro. My programmer is the Arduino USB2Serial. I am running the Windows store app on a Windows 10 machine. I wired everything up according to the ...
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  • 111
0 votes
1 answer
65 views

Cannot use radio transmitter after switching to LowPower library

My Arduino Mini board has DHT22 temperature sensor and 433MHz radio transmitter modules. I'm using DHT and RCswitch libraries to make use of them. Code looks like this: void setup() { tempSwitch....
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  • 103
1 vote
1 answer
575 views

Why is Arduino Pro Mini not powering this LED?

First off, I'm very new to Arduinos and electronics in general, so feel free to explain like I'm 5. As a bit of background to this question, the project is simply using a Pro Mini to run a servo, ...
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  • 43
0 votes
2 answers
461 views

Error while uploading the sketch for Arduino Mini

I'm having a problem while uploading the program. Arduino: 1.8.4 (Windows 10), Board: "Arduino Mini, ATmega328P" Archiving built core (caching) in: C:\Users\UMME-K~1\AppData\Local\Temp\...
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  • 11
0 votes
1 answer
2k 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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  • 18
1 vote
1 answer
1k views

Send an multidimensional array of values from one arduino to another through serial port

I have connected two arduinos using pins: RX and TX and managed to send a string as an array of values: //sender char mystr[6] = "hello"; void setup() { Serial.begin(9600); } void loop() { ...
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  • 141
-1 votes
1 answer
41 views

using pull-up resistors with A-star 32u4 on putput pins?

Okay probably not the first time this has been asked, but really, I search all over the internet and was not able to find this. I want to drive LEDs on the output on some of my pins. Is it required to ...
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2 votes
1 answer
60 views

Clamping 9-volt input to 8-volt?

Have a DFRobot Arduino Pro Mini. Seems odd to me, but according to their specs the voltage regulator on board cannot handle more than 8-volt input. I can find no documentation, or have they answered ...
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0 votes
1 answer
77 views

Programing a Mini 05 without a USB-to-serial converter

I have an Arduino Mini 05 clone Wattuino, an Elegoo Mega, a Powerboost 1000c, but not access to a USB-to-serial converter. Is there any way to program the Arduino Mini with these devices? I tried to ...
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2 votes
2 answers
47 views

Can we use Arduino mini in eagle to create new custom modal

I want to learn pcb design in Eagle/Fritzing. So i was thinking of using existing amazing Arduino mini/nano in eagle and create a custom pcb which has all arduino capability and plus some components ...
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  • 37
1 vote
1 answer
272 views

Can't upload to Arduino Mini via Arduino USB 2 Serial Converter

I bought an Arduino Mini and also an Arduino USB 2 Serial Converter. While trying to program the Arduino Mini, I get this error: avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x00 ...
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2 votes
1 answer
41 views

Diorama Controller Part 2 - Need More Outputs

For background see my original post. I've decided to not to use batteries and have it wired up with wall power. I wish to use the Arduino Pro Mini 5V as the controller for my diorama project. I ...
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  • 135
2 votes
0 answers
142 views

IR sensor not detecting light or dark sufaces

I wrote code for the vibrating motors to vibrate when an IR sensor detects a darker surface. I have 4 vibration motors for corresponding 4 IR sensors. My program is not able to read the values from ...
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  • 33
1 vote
0 answers
565 views

MAX485 communication between multiple Arduinos

I purchased multiple Arduino Mini Pros and MAX485 TTL boards and now I'm trying to make them communicate together, but the problem is that I need that everyone can send and receive when needed. I ...
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5 votes
3 answers
2k views

How to power my Arduino mini using wall socket?

I am trying to power my Arduino Mini (which is connected to IR receiver and a relay board). The idea is to hide the entire setup behind the electrical board including the power supply. I have hacked ...
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  • 235
0 votes
1 answer
140 views

Qduino Mini bricked?

So I have been experimenting with keyboard inputs and I think I may have accidentally put a loop in my code that never actually ends the keyboard input thus not allowing me to upload any sketches to ...
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1 vote
1 answer
195 views

How to use setModemRegisters in RF24

The below picture is the introduction of setModemRegisters . First: What is the mean of ModemConfig* config? I mean: how to write the parameter. Maybe just give a example, and it will be better if it'...
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  • 123
15 votes
1 answer
24k views

How do interrupts work on the Arduino Uno and similar boards?

Please explain how interrupts work on the Arduino Uno and related boards using the ATmega328P processor. Boards such as the: Uno Mini Nano Pro Mini Lilypad In particular please discuss: What to use ...
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  • 35.3k
1 vote
3 answers
419 views

Programming an Arduino Mini 05

So, I recently bought an Arduino Mini (5V, 16MHz), and a USB to Serial Converter. Provided are the links to both the products: Arduino Mini, USB to Serial Converter Now, I tried programming the mini ...
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2 votes
2 answers
1k views

I can't get code transferred to my Arduino Mini Pro

About 3 years ago Sparkfun had a sale on Arduino Minis, so I bought 6 of them (3 x 3.3 V @ 16 MHz and 3 x 5 V @16 MHz). I used two of them for separate projects (everything worked flawlessly) then ...
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  • 53
0 votes
1 answer
291 views

Picking the time a led on an arduino should turn on, via android

I have created an app which is connencted to my arduino via bluetoth. The user of the app can turn on and off a led which is connented to the arduino. But I want to take it a step further... I want ...
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0 votes
1 answer
354 views

How to read data from PC

I'm new to Arduino. I'm passing some data from my Android phone to my Macbook via bluetooth (throught the app Sensoduino). What I'd like to do now is to export that data to my Arduino Mini Pro. Is ...
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0 votes
1 answer
344 views

Arduino mini being programmed with CH340G

So, I have bought this USB programmer with CH340G chip on it, but it seems, that I cannot program arduino mini clone. So, this programmer has pinout of 5V|GND|TX|RX|3V3. I have connected TX to TX ...
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  • 196
2 votes
0 answers
1k views

Why the serial connection only work when Tx and Rx are shorted?

I have a Arduino Pro Mini 3.3V connected to a sim800l chip using a serial connection of 9600bps. When I connect the Arduino to the device, it seems I don't receive anything on the Arduino Rx pin. I ...
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  • 121
3 votes
3 answers
19k views

Ping IP address using ESP8266 connected to Arduino

I want to make a system using NeoPixels, an Arduino and an ESP8266 module to ping IP addresses on my network to determine if certain people are on our Wi-Fi (I'll be pinging mobile phones). I'm ...
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  • 153
1 vote
2 answers
4k views

Which Bluetooth Module can I use with Arduino Micro/Mini?

I need to use a Bluetooth module with an Arduino Micro/Mini. Please suggest which one would be the best, HC 05/06, or any other?
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0 votes
1 answer
145 views

Arduino TMP36 sensor

I am following the tutorial Tiny WiFi Temperature Sensor with Arduino. everthing works fine, but I have a little problem. When the serial monitor is opened the sensor is reading fine like 23.20, 20....
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  • 101
0 votes
1 answer
150 views

XBee + Arduino Problem

I've been doing some XBee experiments with Arduino Pro Mini 5V. I knew that XBee S2 is 3.3V only, so I've connected its Vcc to 3.3V from external supply, but I had also connected XBee RXTX to arduino ...
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2 votes
1 answer
113 views

powering RF on GPIO

I have been running a simple RF link between 2 arduini uno recently and everything went faily well. I am now trying a new project with an arduino mini pro (5V/16MHz) and the seeeduino RF link (@315MHz)...
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  • 121
2 votes
2 answers
962 views

USB mini type B port on Arduino Uno

I bought today an Arduino Uno R3, and I'm looking forward to make it an HID device. I have seen many projects using a serial USB type B port. As I want to build a little gamepad, I would like to use ...
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2 votes
1 answer
263 views

How to calculate voltage?

I want to check each cell voltage using arduino. and how to calculate dc current using CT Sensor using Arduino?
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1 vote
1 answer
1k views

How to troubleshoot the Arduino Mini and Arduino usb2serial?

I am trying to get an Arduino Mini (R5, mega 328p) working. Just connecting it to power has following effect: the on-board LED lights up. It's the power-on-led, I presume. Since other Arduino ...
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3 votes
0 answers
644 views

Read from the SD card - ACMD41 times out

I'm trying to read from the SD card using an Arduino Pro Mini (3.3 V), Pololu micro-SD reader (the 3.3V one) over a SPI protocol. I've tried both the SD library from Arduino SDK, and the Adafruit one....
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  • 141
5 votes
2 answers
2k views

Store floats in and reading them from flash

How do I store floats in flash and how do I read them from there? (I need a look-up table for pairs of float values.) The storing part doesn't seem to be so difficult as this compiles: PROGMEM float ...
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2 votes
0 answers
689 views

Feedback Request: HID USB to Bluetooth Relay

Bluetooth Relay Project: Develop a USB to bluetooth adapter for my mechanical keyboard. Using a USB host shield, have an Arduino Pro Mini read keyboard usb commands and repeat them over bluetooth. ...
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0 votes
1 answer
2k views

Arduino Mini Pro not working with my Neopixel project

my project involves 9 Neopixel LEDs. I have tested my code with my Arduino Uno board successfully. I'm using a mix of breadboard, jumper wires, and solder to connect everything. Powering the strip of ...
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  • 11
2 votes
2 answers
2k views

Light sensor always getting max value

I have build a simple voltage divider with a light resistor and a 5.6k resistor. I am reading the input on A0 on my arduino board but it is almost always at 1023, independent of light. If I cover it ...
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9 votes
2 answers
17k views

What is the maximum wire length for serial communication between two Arduinos?

I am building a project in which two Arduinos will be linked by three wires: TX an RX for serial communication and a common GND. What would be the maximum length of the wires here before communication ...
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  • 487
1 vote
2 answers
14k views

How to know which Arduino to choose: Nano, Micro or Pro Micro?

I'm puzzled at the moment with which one to choose. Form-factor plays a significant role in my project, so I prefer the smaller boards mentioned in the title to fuller boards like the UNO, MEGA, etc. ...
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