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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3 answers
450 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 .....
0 votes
1 answer
320 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 ...
-2 votes
2 answers
306 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, ...
0 votes
1 answer
5k views

Powering an Arduino Pro Mini directly from a LiPo

I've recently purchased an Arduino Pro Mini, 3.3V version. I've planned to use it in a diy remote: I've empty a ps2 remote, just left the buttons, and the board will be inside. The remote will be ...
-1 votes
2 answers
105 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 ...
1 vote
0 answers
264 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-...
0 votes
1 answer
118 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 ...
1 vote
2 answers
965 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 = ...
3 votes
2 answers
210 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 ...
5 votes
2 answers
428 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 ...
2 votes
1 answer
122 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 ...
1 vote
0 answers
624 views

Arduino Pro Mini ATmega 328P: garbage output on serial console

Arduino Pro Mini ATmega 328P 3.3V 8MHz, connected to USB port via USB to Serial breakout board built around the FT232RL FTDI chip. JTAGenum project code uploaded to the Arduino. I opened terminal and ...
-1 votes
1 answer
140 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....
3 votes
1 answer
868 views

Raspberry Pi, Teensy and Arduino's on i2c

I just got into an interesting mess. I have 3 Arduino's (Pro Mini's) and 2x Teensy's (3.1's) connected via I2C to a Raspberry Pi Master. The 2x Teensy's I2C data lines are connected via OctoBoards ...
2 votes
2 answers
3k views

How to get Baite Pro Mini working?

I have recklessly bought the Baite Pro Mini and I find it difficult to upload any program. I use Ubuntu Linux, but out of frustration I am ready to install Windows, if it is necessary. I've read the ...
7 votes
7 answers
14k views

Arduino 16 MHz with only 3.3V?

Now I have these Arduino Pro Mini from Sparkfun. They are the latest version that I know (yeah, it's the one that have those horrible misaligned pins). Now they are designed around the ATmega328P and ...
0 votes
1 answer
570 views

SPI.H library to control APA102

I am trying to run a strip of APA102 addressable LED's using a Mini pro. The same strip I can run using a raspberry pi using SPI so I know the Strip works and what data I need to send to get it ...
2 votes
4 answers
225 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 ...
5 votes
4 answers
5k views

Arduino PRO Mini - The pads [was "jumpers"] on the back and Low Power Consumption

I've noticed that on the back of an Arduino PRO mini are two Jumpers next to the A4 and A5 pins, marked with red in the following : Looking at the leads one seems to be a bypass for the POWER Led and ...
1 vote
1 answer
314 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 ...
1 vote
0 answers
60 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 ...
1 vote
0 answers
131 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 ...
-1 votes
2 answers
720 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 ...
8 votes
2 answers
13k views

Audio Frequency White Noise generation using Arduino Mini Pro

For DIY, how to program Arduino Mini Pro to act as an Audio Frequency White Noise generator? Presumably, a) using one Digital Output pin b) feed to a simple passive RC low pass filter to reduce ...
1 vote
1 answer
393 views

Arduino Pro Mini name in CMakeList.txt in CLion

I recently try to get my Arduino Pro Mini (5v 16mhz)running in Clion. I tried to set up the CMakeList.txt but I get the following error: Error:Can not find f_cpu in boards.txt for Arduino board ...
1 vote
1 answer
5k views

Mounting Arduino in an enclosure

I've decided to use Sparkfun's Pro Mini boards to make my project into a semi-professional product. My first thought turned to enclosures - of which the entire internet seems to be bereft. If I ever ...
-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:...
1 vote
2 answers
1k views

Powering arduino and 12V Fan from same supply

I have found a relatively small 12V switching power supply that I want to build into my device, using it to power both the Arduino Pro Mini and a couple of 12V cpu fans. Am I correct in assuming that ...
1 vote
0 answers
459 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 ...
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 = ...
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 ...
0 votes
3 answers
2k views

Multiple I2C BREAKOUTS with pull-up resistors doesn't work [UPDATE]

[UPDATE] Now it works fine but the as soon as I add the GY-521 module (hardware not software), it starts sending me crapy info Project uses: Arduino Pro Mini as brain FTDI as a programmer GY-521 ...
1 vote
1 answer
381 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 ...
1 vote
1 answer
121 views

Arduino Mega prototype analog timer interrupts: newbie question

I am currently using an Arduino Mega with a fast vibration sensor to trigger the components operation (force sensor, temperature sensor) and also toggle sleep mode. I am very new at this and I have ...
1 vote
1 answer
427 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 ...
1 vote
2 answers
258 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 ...
2 votes
0 answers
76 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 ...
2 votes
4 answers
3k views

PWM on non PWM pins

Why does this code not function in a similar way to the example fade sketch? I have had to resort to using bit-banging as a way to implement PWM onto non PWM pins due to a lack of available free pins ...
1 vote
0 answers
56 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 ...
2 votes
0 answers
248 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 ...
0 votes
1 answer
799 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 ...
21 votes
3 answers
16k views

Arduino Pro Mini (3.3V version) input voltage range / tolerance

I have a few Arduino Pro Mini clones (cheap Chinese stuff) and would like to power them with 12V power supply (same as fan voltage). According to the Arduino Pro Mini spec the RAW pin can take 3.35-...
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 ...
2 votes
8 answers
22k views

Getting "avrdude:stk500_recv(): programmer is not responding" while uploading sketch to Arduino Pro Mini

I recently bought an Arduino Pro Mini(3.3V 328p, 8MHz) along with a CP2102 USB to TTL UART convertor. When I try to upload a sketch to the Pro Mini using it, I get a avrdude:stk500_recv(): programmer ...
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 ...
1 vote
1 answer
421 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 <...
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 ...
5 votes
1 answer
11k views

Wire.endTransmission() Hangs

I have written a code that transmits data over the I2C channel, The device ID and every other stuff is working fine. The only issue being that my code gets stuck at Wire.endTrasnmission(). I found ...
7 votes
3 answers
440 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 ...
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 ...

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