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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17 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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1answer
48 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 = ...
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3answers
219 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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1answer
53 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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0answers
39 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...!! ...
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3answers
1k 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 ...
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2answers
81 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 ...
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0answers
14 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, ...
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2answers
36 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 ...
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1answer
31 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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45 views

power consumption higher after XKC-Y25-V detects water

I am using an Arduino Pro Mini and a non-contact liquid sensor (XKC-Y25-V). I have the positive of the liquid sensor connected to pin 5, its sensor to pin 3 and ground to ground. I turn on the ...
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2answers
152 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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1answer
84 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 ...
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0answers
27 views

Prevent reading flash from Arduino (Pro Mini for example) with fuses

The situation is the following: I'm uploading code to Arduino board using USB programmer which communicates with the board via Tx/Rx serial (so boot-loader remains on the board). I want to prevent ...
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0answers
37 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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1answer
47 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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199 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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2answers
61 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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0answers
131 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 ...
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0answers
35 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 ...
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2answers
68 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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56 views

Verify arduino working voltage

An Arduino pro mini vcc measured and it was 3.3v.so it should be a 328p 8MH 3.3v arduino pro mini. but it only works properly if i choose processor as Atmega328p 16MH 5V in arduino IDE while ...
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418 views

Serial communication is not working in arduino pro mini

I am using arduino pro mini ATmega328P(5v 16MHz) and a ftdi FT232RL to connect to the PC. The arduino does not produce any output for the AT coomads(blank output) when I connect both rx and tx pins to ...
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0answers
39 views

Maximum UART bus speed with a microcontroller clock frequency of 8mHz and 3.3V supply?

I have an Arduino Pro Mini running at 8mHz with 3.3V supply. I plan to connect it to the RS-485 transceiver (MAX14783E). Tell me, is UART permissible at 115200Baud on a microcontroller with a clock ...
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1answer
45 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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28 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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0answers
79 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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1answer
207 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 ...
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195 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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1answer
201 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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92 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, ...
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2answers
113 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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0answers
440 views

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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2answers
357 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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1answer
30 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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1answer
485 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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0answers
79 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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0answers
64 views

Can i used code written in BASIC (.hex File) to write an Arduino sketch?

Poormans Soldering Station GCBasic Code Hi, i have followed these plans to create a soldering station but changed the atmeaga chip for an Arduino Mini Pro. http://poormanelectronics.blogspot.com/p/...
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1answer
806 views

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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1answer
270 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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1answer
383 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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2answers
2k 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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1answer
188 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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1answer
59 views

Why Would Declaring a Global Variable Change How An Unrelated Conditional is Evaluated?

Here is my entire sketch. This is my first Arduino project. I included all of it because I don't know what's relevant. I am printing out to a 4-digit 7 segment display. To do that I use sprintf to ...
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2answers
373 views

How to program an Arduino pro mini using native serial port (on my mainboard)

How can I program my Pro Mini using the native RS232 Serial port on my Mainboard (aka com1). Google-ing did not really help and a quick search here for "pro mini programming com1" did not deliver ...
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1answer
711 views

Short battery life concern with Arduino Pro Mini

I am using an Arduino Pro Mini with a L293D H-bridge driver to drive a bi-directional motor. The system takes input from a capacitive sensor which is constantly looking for a trigger. I don't have any ...
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1answer
73 views

Can batteries be damaged? [closed]

I have some questions when it comes to draining batteries with low power projects. I have been making a few low power projects with Arduino Pro Minis running on batteries. Some run on single non-...
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1answer
129 views

LDC paired with Arduino locks up and freezes. Out of SPRAM?

I am making an alarm clock using a 4x20 lcd display, rtc, and Arduino Pro Mini 3.3v. I have implemented a menu system for setting the time/date that blinks the text on the lcd display to indicate that ...
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1answer
88 views

How to use the 0.91' 128*32 OLED by arduino pro mini?

I buy a OLED as picture below, I want to use https://github.com/adafruit/Adafruit_SSD1306 to control it. But the example of https://github.com/adafruit/Adafruit_SSD1306 can't be compiled. The error as ...
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2answers
625 views

Connect arduino pro mini 3.3v to 5v

Is it safe to run an arduino pro mini 3.3v by 5v? I mean directly connect 5v to vcc not raw pin.

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