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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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Help reducing dynamic memory usage with LoRa library

I have combined code that reads heart rate and SPO2 then sends the data using LoRaWAN. Using these 2 libraries that work well by themselves LoraWAN lib | MAX30102 lib. My board is an Arduino Pro or ...
Inversionist's user avatar
-1 votes
2 answers
128 views

How can I get servos to not brownout my Arduinos and power supply?

I have a problem with a project where one servo is resetting (browning out) two Arduino Pro Minis running 3.3v/8mHz. The two Arduinos are connected by SoftwareSerial on pins 9 and 10 and the slave ...
Charlie Nicholson's user avatar
0 votes
1 answer
122 views

Arduino pulls i2c bus down

I am building an airplane. As a controller I am using a Raspberry pi 4. There are 3 sensors (MPU6050, QMC5883L, BME280) and arduino pro mini connected to the raspberry via i2c. When sending requests ...
Xrou's user avatar
  • 13
3 votes
2 answers
221 views

How to turn LEDs based on voltage readings?

I am trying to turn LEDs in an LED bridge based on the voltage reading from a power source. when the Voltage is zero nothing is ON and then the LEDs gradually turn ON as increase the voltage connected ...
Anwar Elhadad's user avatar
5 votes
2 answers
505 views

Arduino Freezes (probably because of I2C) - Need help to write robust script

Arduino Pro mini 3.3V stucks few hours after startup. After repowered, it begins to stuck within a few seconds. If I wait long enough before turning it on it stucks little later for example now it ...
CaveScientist's user avatar
1 vote
0 answers
281 views

How can I program an Arduino Pro Mini with an ESP8266-01 connected to its TX and RX?

I am working on a project that uses an Arduino Pro Mini to gather information from various sensor. Once the readings are taken I turn on an ESP-01 from a separate dedicated 3.3v power supply. The ESP-...
user1114881's user avatar
2 votes
1 answer
127 views

Motion-activated lights

I am attempting to follow this tutorial to light up a dark staircase with motion-activated LED strips. If my understanding of the tutorial is correct, essentially the Arduino's job is to power or ...
Eidan Jacob's user avatar
-1 votes
1 answer
151 views

Arduino 3.3v pro mini, most efficient use of AA batteries for power

I want to use a 3.3V pro mini that uses a BME 280 to take temp/pressure/humidity, and nRF24L01 module to transmit the data, at ?10 minute intervals. I want to use 1, 2,3 or 4 AA batteries to power it....
user4109's user avatar
-2 votes
2 answers
329 views

Arduino Pro Mini doesn't automatically reset

I have an issue with my Arduino pro mini. Yesterday, I uploaded a sketch a few times on the pro mini, with an FTDI adapter, and everything worked fine. Today I'm trying to re-upload a sketch, but now, ...
BruceWawe's user avatar
1 vote
0 answers
65 views

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 ...
Kokachi's user avatar
  • 123
2 votes
4 answers
227 views

Arduino Pro Mini doesn't align nor connect in fritzing

When using fritzing (0.9.6) I notice that the Arduino Pro Mini 3.3 V component doesn't align nor connect to breadboard pins like other components. Is this a bug or a feature? I've tried to wiggle the ...
maxschlepzig's user avatar
-1 votes
1 answer
45 views

'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:...
TRS-80's user avatar
  • 21
0 votes
1 answer
36 views

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 = ...
Ben Seaman's user avatar
1 vote
1 answer
369 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 ...
guyd's user avatar
  • 1,049
1 vote
1 answer
449 views

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 ...
Flight64's user avatar
2 votes
0 answers
78 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 ...
mystack's user avatar
  • 21
1 vote
2 answers
269 views

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 ...
Garvit Goyal's user avatar
2 votes
0 answers
262 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 ...
AjithMahi07's user avatar
0 votes
1 answer
823 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 ...
Nevin Kristen's user avatar
1 vote
0 answers
135 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 ...
Anmol Kumar's user avatar
1 vote
1 answer
387 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 ...
Jonathan Agravante's user avatar
1 vote
1 answer
145 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 ...
Anmol Kumar's user avatar
2 votes
1 answer
122 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 ...
Emanuel Giurgiu's user avatar
1 vote
1 answer
433 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 <...
user avatar
1 vote
2 answers
992 views

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 = ...
user avatar
7 votes
3 answers
444 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 ...
Lindsay Cox's user avatar
1 vote
1 answer
320 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 ...
I Like's user avatar
  • 205
2 votes
0 answers
73 views

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...!! ...
BLUE's user avatar
  • 35
4 votes
3 answers
3k views

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 ...
Sergio's user avatar
  • 57
3 votes
2 answers
2k views

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 ...
Keima-kun's user avatar
1 vote
0 answers
98 views

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, ...
connersz's user avatar
  • 266
-2 votes
2 answers
220 views

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 ...
user1114881's user avatar
1 vote
1 answer
264 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 ...
AdamVarga's user avatar
0 votes
2 answers
1k 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 -&...
cmhughes's user avatar
  • 103
0 votes
1 answer
633 views

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 ...
Sohan Arafat's user avatar
1 vote
0 answers
209 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 ...
Michele Cioccarelli's user avatar
0 votes
1 answer
330 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 ...
blazingcannon's user avatar
-1 votes
2 answers
744 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 ...
Ali Morawej's user avatar
0 votes
2 answers
364 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 ...
malloc's user avatar
  • 103
1 vote
0 answers
439 views

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 ...
Rick's user avatar
  • 61
1 vote
0 answers
55 views

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 ...
Rahul SIngh's user avatar
1 vote
2 answers
276 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 ...
Altaris's user avatar
  • 13
0 votes
1 answer
68 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
Akash Tiwana's user avatar
1 vote
0 answers
57 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 ...
Gary Quiring's user avatar
1 vote
0 answers
201 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); ...
GreenXL's user avatar
  • 11
0 votes
1 answer
582 views

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 ...
user avatar
1 vote
0 answers
461 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 ...
Dogan Cignakli's user avatar
0 votes
1 answer
953 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 ...
gerasalus's user avatar
  • 103
1 vote
0 answers
192 views

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, ...
Mario J.'s user avatar
1 vote
3 answers
470 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 When I try cables like this: TX .....
adrianTNT's user avatar
  • 252

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