Questions tagged [arduino-pro-mini]

An Arduino Pro Mini is a small microcontroller derived from the Arduino Uno using the ATmega328. It is unique for its tiny size and the required external FTDI adapter.

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Low power RF decoder possible?

I'm building a panic button project for my grandma which uses a 433MHz RF remote keyfob and a 3.3v Pro Mini connected to an RF receiver, a buzzer and an led. The purpose is that whenever she needs ...
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'for loop' seems to change the execution of pow()

The first time, pow() works. But inside of a 'for loop', or again afterwards, it doesn't behave !? (I'm using a Chinese Pro Mini with Arduino 1.8.16) EDIT To clarify what I am asking, my question is:...
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Trying to program a Led Counter Want a Led to flash every 5 minutes however it flashes twice every second (Noob) [closed]

Heres the code i've Wrote i feel like the issue lies in how ive used the if statement int ledPinS = 13; //Classifies pin 13 as Connected to an LED //Flashes every second int ledPinM = ...
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1 vote
1 answer
221 views

Pro Mini - Using RAW pin for 3.3v input

I design a PCB that one of its components is a 3.3v Pro Mini. Since I want it versatile regarding powering the PCB (3.3v or 5.0v) I want to know if it is a good practice to supply 3.3v to Pro Mini's ...
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AT 09 BLE module not transmitting data

I have recently started working with the Arduino Pro Mini 5v/16Mhz and an AT 09 BLE module for an IoT project. I am controlling the BLE module using Software Serial and am leaving the hardware serial ...
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2 votes
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40 views

My LED display fails with MSGEQ7 output stuck

I have an Arduino setup with a pro-mini, a MSGEQ7, and a auto-gain mic. Even if I remove the audio input to the MSGEQ7 remains the same in the 890s (out of 1024). It's the same on each of two new ...
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2 answers
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Blew my arduino pro mini s4 named component

While working on my project I supplied 12v to my pro mini through raw input and then a s4 named component smoked and my pro mini stopped working . It didn't turn on either through vcc or raw. The ...
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2 votes
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89 views

Arduino pro mini resetting itself

I am working on a brushed motor quadcopter using Arduino pro mini. Every time I try to throttle, the Arduino gets reset by itself (motors start to spin but they will be turned off in 2 sec). I have ...
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305 views

LED does not blink - Arduino UNO+WiFi R3 ATmega328P+ESP8266 board

As I am learning the Arduino coding, I want to see if my program can turn on the LED light. I have tried all the things, but the code does not start the LED light I have installed on the board. The ...
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85 views

Problem getting data from Arduino pro mini

I am currently working on a drone project using multiwii. I m using mpu6050 as gyro and accelerometer sensor with i2c protocol. I was able to read data coming from mpu6050 while using Arduino Uno ...
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1 answer
189 views

RN42 Bluetooth HID KEYBOARD sketch by silverball

How can I use RN42 sketch by silverball /* RN42_HIDRaw_Arduino.cpp - Roving Netowrks RN42 Bluetooth HID raw library Developed by Chris Leitner - 2012 This library is free software; you can ...
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122 views

Multitasking with Arduino?

I am making a Christmas Tree with Arduino. I found a 12 led chaser code on internet so I made 12 rows of leds and hook them up to my Arduino pro mini. They are working just fine. However, I also want ...
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2 votes
1 answer
91 views

Arduino with interrupts enters in a locking state

I am quite noobish with using the interrupts on Arduino and I am facing a strange problem. I am using an Arduino Pro Mini, a light sensor and an RTC module(DS3231) which has set 2 alarms, one at ...
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1 vote
1 answer
199 views

RadioHead library change the state when a new message is received

I would like to control a toy car from the server. I use RadioHead library for communication and it works fine. The application running on the server side is as follows. #include <...
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Rc switch library display received values only one times using serial monitor

I use Rc switch library to transmit and receive data. It works fine. The part that sends the data is as follows : #include <Arduino.h> #include <RCSwitch.h> RCSwitch transmitter = ...
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8 votes
3 answers
336 views

Measuring li-ion that arduino is running from

I am using a 5v Arduino pro mini (with regulator and power led removed). I have been reading how to accurately measure Li-ion batteries when powering from the same battery you are trying to measure ...
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1 vote
1 answer
203 views

Why Can't I Program my Atmega168 Pro Mini?

I'm trying to program a Atmega168 Pro Mini 3.3V/8mhz I bought online. I followed a tutorial that walks through the steps of how to program a Pro Mini with an Arduino Uno. However, in their example ...
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Arduino Voltage Reading Problem

I was trying made a gear indicator for my bike, with manually sensing the gear shift. But failed, cause my bike has no separate "neutral" wire, instead there is gear sensor in-built...!! ...
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4 votes
3 answers
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Arduino Pro Mini is burned by 12v. Can I save it?

I have this Arduino Pro Mini clone (ATmega328) 5v. I gave it exactly 12 volts through the RAW power input, but it instantly got hot and started fuming. Fumes were coming out of the area close to the ...
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3 votes
2 answers
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Can I use arduino pro micro rx tx as digital pins

I'm using arduino pro micro Atmega32u4 5v 16Mhz I want to use it to make a HID Keyboard and Mouse but I ran out of pins so I was wondering if I can use the RX and TX pins as digital input pins. Will ...
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1 vote
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Problems using SIM808 with Pro Mini

I'm having problems with my setup. I'm trying to create a wind-speed system when you send an SMS to retrieve the correct wind speed as an SMS response. I'm using a pro mini, connected by USB via FTDI, ...
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Arduino respond to input from HT12D data output

Is there a way to connect a data output pin from an HT12D to an Arduino or ESP8266-12e input pin, then sense when the data pin is activated so I can have the Arduino or ESP8266-12e do something like ...
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1 vote
1 answer
134 views

Why do NRF24L01 modules only communicate in 1 direction

I have 2 NRF24L01 +pa +lna modules connected to 2 arduino mini pros. One of the modules is on a joystick and the other one is on a airplane. Everything worked perfectly until last week when they ...
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0 votes
2 answers
908 views

avrdude: stk500_recv(): programmer is not responding, arduino pro

I'm trying to upload a sketch to upload the blink sketch to an arduino pro using a SparkFun Serial Basic Breakout (on Ubuntu 18.04). setup Within the arduino IDE I have the following set-up: Tools -&...
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How to power Arduino pro mini and DFPlayer mini togather with 3.7 V LiPo battery?

I made a small box containing Arduino Pro Mini , DFPlayer Mini player and a 3.7V LiPo battery. Is it possible to power two devices with 3.7 V Battery? What is the best way to save power for longer ...
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1 vote
0 answers
125 views

arduino pro mini fqbn

Introduction I am trying to program an arduino pro mini, I have to use this board because of it's size. I use the arduino-cli to program arduino and one of the steps to upload code to the system ...
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1 vote
1 answer
155 views

How to find the time of any point on the graph on an Arduino serial plotter or Processing software?

I am plotting the graph of some sensor values on my Arduino serial plotter which looks something like this - But what I want to do is hover over any point on the graph and display the time at that ...
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-1 votes
2 answers
411 views

How to use AT+CFTRANTX command in SIM7100

I am working on a project using pro mini 8MHz/3.3v and SIM7100, I want to know how can I used AT+CFTRANTX command. I am try to read file from EFS and write to SD card via Serial port. I have get some ...
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0 votes
2 answers
227 views

Why can't I use 3V output of arduino pro mini?

I have an Arduino pro mini and I tested digital write of an pin and it is 3.2V and then I connected it to a 3V motor, but when I connected the motor to it, The voltage drops under 0.2 Volt, Can any ...
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Analog Comparator works on Nano, but not working on Pro Mini 3.3v

I've coded an analog comparator to work on Nano, but the same code does not work on a brand new Pro Mini 3.3v 8MHz. The serial monitor just outputs the triggered interrupt continuously. Lines orange ...
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Arduino AT Cmd Not Working

We are Using I-CUBE-LRWA Lora Module AT Cmd with Arduino ProMini Set of commands set with DockLight working Perfectly but with Arduino, we are getting some coded response and well every time RXTimeout ...
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1 vote
2 answers
158 views

Clock frequency VS cycle time

I am considering switching from Arduino Pro Mini 5V 16MHz to Arduino Pro Mini 3.3V 8Mhz for some project because I would like to run it with a 4.5V input power. Will the switch from 16 to 8Mhz double ...
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50 views

MP3 File through ARDUINO

Hey question is that it is possible to play MP3 file in arduino without changing it into .wav file if possible ,then your suggestions are welcome Thanks
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48 views

Can only program Pro Mini board once then error getsync()

I am 100% new to Arduino. I am using the Pro Mini 328P 3.3v 8mhz board. I can successfully write to the board once with the Blink program. I set the FTDI to 3.3v jumper. It works. Then if I try to ...
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1 vote
0 answers
149 views

Sketch works on Arduino nano but not Pro Mini

I have a simple test sketch to run for my led aquarium: #include <IRremote.h> #include <IRremoteInt.h> IRsend irsend; void setup() { } void loop() { irsend.sendNEC(0xF7C03F, 32); ...
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1 answer
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How can I receive signal from remote control using tcrt5000 sensor module

how can I use tcrt5000 sensor module instead of TSOP31238 (TSOP1738) IR receiver to get signal from remote control? I want to create remote control for my PC to navigate through my slide shows. Thanks ...
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1 vote
0 answers
379 views

HX711 with NodeMcu

I am trying to make a scale that measuring weight. In internet i did some researches so i got some questions. I have this module as a HX711 And square 3 wired loadcells( Red,White,Black Wired). My ...
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0 votes
1 answer
515 views

CNY70 from 3.3v instead of 5v?

I would like to use a CNY70 with arduino that is not 5v but 3.3v powered. On the web there most tutorials use 5v and 200 + 10k resistors (e.g. here and here). So as far as I understand for 3.3v I ...
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DS3231 OSF register changing without lost date

Dears, I have an logger prototype with arduino and ds3231 breadboard. My code check periodically OSF register to check if oscillator is/was stopped, as informed in datasheet. I turn on my logger, ...
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1 vote
2 answers
245 views

How to set cables to connect Cp2102 to Pro Mini?

How to connect the cables in order to program the pro mini with the CP2102 usb interface ? The TX RX and GND is easy, but I am not sure about the RST, DTR, DST, etc I attached the images of both. ...
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Choosing between ESP32 and Arduino Pro Mini

This is probably a fundamental question but I am hoping to get some pointers on how to chose between Arduino Pro Mini and ESP 32. I am hoping to make a wrist based wearable like fitbit. Three ...
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2 answers
1k views

Why the SoftwareSerial is not working properly on Arduino Pro Mini 3v3?

I uploaded regular pass through code for Serial and SoftwareSerial to communicate with my AT command based module. Writing to SoftwareSerial seems to be working but reading not. As I write "AT", the ...
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1 answer
36 views

Can an Arduino Pro Mini interface with a full-sized WiFi shield?

We have an Arduino Pro Mini on a breadboard connected to a 9V battery and a sensor, reading data. We also have a full-sized Adafruit WINC1500 WiFi Shield with PCB Antenna. I would like to know if they ...
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-1 votes
1 answer
845 views

Sending a string from Arduino to ESP8266 works on UNO but not on Pro Mini

I have a project where I am getting sensor data and sending it over to an ESP8266-01 to send to ThingSpeak. After some work I got it to work. So like a real smart person I decided to replace the ...
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1 vote
0 answers
126 views

Programming arduino with FT232RL, not in sync: resp=0x00

I realize this generic error has been asked about lots of times before, but I have been unable to find an answer that works for me. I have a bunch of pro mini's that I program with an FT232RL. It ...
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1 answer
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How do I feed NRF24L01 from Arduino Pro Mini?

I wanted to control speed of my four coreless DC motors using Arduino Nano. Then I realised my 3.7V 380mAh 25C and 720mAh (110mAh on picture is just to hold my battery's place) 25C LiPo batteries won'...
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0 votes
1 answer
540 views

Connection of a DS18B20 on a Arduino pro mini

I'm actually trying to connect a DS18B20 sensor to a homemade board build with a ATmega328P processor running with a power of 3.3V and at 8 Mhz. In order to get the address I wired the board as the ...
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1 vote
1 answer
689 views

FT232RL Chip pinout to flash Arduino Pro Mini [closed]

Looks I have a FTDI USB to TTL adapter that doesn't follow the standard Arduino FTDI pinout order. The chipset is FT232RL and here is the link to Amazon page. https://www.amazon.com/Adapter-Serial-...
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4 votes
2 answers
4k views

Why is AREF connected to a capacitor in the Arduino Pro Mini Schematic?

I'm currently looking at the Arduino Pro Mini schematic and have noticed that the pin AREF (analogue reference) is connected to a 0.1uF capacitor as shown below: I have done some research and read ...
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1 vote
1 answer
254 views

How to trigger NodeMCU sketch from Arduino Leonardo Micro Pro?

So this is probably a very simple question. I have my NodeMCU set up and working where it connects to wifi and sends a push notification. Currently it does that automatically when connected to power. ...
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