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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3answers
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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 ...
0
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0answers
21 views
Getting garbage data in Arduino Pro mini from ESP01 serial communication
I have a circuit where in an ESP8266 (ESP01) is connected to Arduino Pro Mini (hardware Serial RX/TX of Arduino connected to hardware serial TX/RX of ESP01 without level shifter). My intention is to ...
0
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1answer
63 views
SOLVED - Strange power comsuption into sleep mode
The solution is below
I've finished my project and now I'm measuring the current but there is something wrong. I'm using an Arduino Pro Mini board and the LowPower library but the consumption is ...
0
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2answers
28 views
Trying to explain strange behavior when attempting to do a digitalWrite to A7 on a pro mini?
I found out the hard way today that pins A6 and A7 can't be used as digital outputs, but what actually happens when you try to read/write them?
Some backstory: I soldered some headers onto a pro mini ...
0
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2answers
83 views
How can I run HC-05 on 8MHz Pro Mini?
I run an Arduino Pro Mini on ATMega328 3.3V 8MHz, and I am unable to send data over HC-05 breakout board on this frequency, and on 5V 16Mhz, it has no issues.
The Arduino code is down below:
#...
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3answers
60 views
How do you configure ADC7 on the Arduino Pro Mini as a digital output?
I'm attempting to use the pin labeled 'ADC7' from the Atmega328p TQFP package. The Atmega documentation suggests that can be used either as an analog or digital I/O point. I'm trying to configure it ...
0
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2answers
27 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 ...
0
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1answer
28 views
Electronically, should single or several ground pins be used?
I have heard two theories of grounding: pretty much ground a board at single point, or ground everything in sight.
With the Mini Pro, is it better to provide one source of ground through the Gnd pin ...
1
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1answer
27 views
Is it better to use Vraw or Vcc on Mini Pro?
I have 12V and 5V power available. Is it better to feed the 5V through the Vcc pin or either the 12V or 5V through the Vraw pin?
0
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1answer
20 views
How do I stop 5v on the I2C port of a pro mini so I can use 3.3v devices?
The theory is that you can use 3.3v I2C devices from a 5v device as long as the pull ups are only to the 3.3v. I have a 5v pro mini connected to a bmp180 board which has a 3.3v regulator but no level ...
0
votes
1answer
41 views
Possibility of getting a UID on Arduino
Im working on a project where I will be using multiple Arduino (pro mini)'s which emit sensordata through LoRa.
The problem I am currently facing is, when I have multiple sensors, how do I know what ...
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0answers
91 views
Is the A6 module broken?
Hi recently I've could send some messages with the A6 GSM module, which uses AT commands. To switch on the board, you need to press the power button about 4 seconds or connecting the VCC pin to the ...
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0answers
14 views
Should SJ1 be open or closed for Arduino Pro Mini 3.3v / 8Mhz?
Please excuse my ignorance, could someone advise me real quick...
If I were to try and build an Arduino compatible circuit based on the Pro Mini schematic for 3.3v / 8Mhz, should SJ1 be open or ...
1
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1answer
81 views
Arduino pro mini (clone) @1Mhz target does not answer
Recently I have been experimenting with battery powered sensor (mySensors).
I created node with 3.3V Arduino Pro Mini (ATMega328P @ 8Mhz with nordic radio chip and BME280 sensor) and successfully ...
1
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2answers
32 views
Adding external power supply to any arduino connected component
I have an Arduino Pro Mini 3.3v and the voltage is too small for my buzzer to ring loudly. I want to add a 9v battery to power the buzzer.
This is my current circuit:
Arduino (pin 9) => Buzzer +ve
...
0
votes
2answers
42 views
What do I do about a compiler error “ variable 'font' must be const”
I am trying to run the test program from Adafruit, with their libraries, for an Arduino controlling a Nokia5110 display and get this error message:
Arduino: 1.5.8 (Linux), Board: "Arduino Pro or Pro ...
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2answers
69 views
How to get the ID of an Arduino? [duplicate]
I use Arduino Pro Mini. As I know, every MCU has a number. Different MCU has different number. How to get it ?
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1answer
47 views
How do I run multiple vibration motors from an Arduino Mini with PWM?
I'm building a project for my Physical Computing class that involves 4 vibration motors for varied haptic feedback based on serial input via analogRead. I have each coming out of their own pin and ...
1
vote
1answer
83 views
It seems like the math of arduino is off
[SOLVED] By changing the offset for the incoming data into int16_t type there won't be any rounding errors and the values I'm getting are all back to zero in the sensor its base position
This is my ...
3
votes
2answers
171 views
Cannot move TM1637 from Uno to Pro Mini
I have a very simple setup which works fine with an Uno.
#include <SevenSegmentTM1637.h>
#include <SevenSegmentExtended.h>
const byte PIN_CLK = 2;
const byte PIN_DIO = 3;
...
6
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0answers
58 views
SOLVED - Waking up async the Arduino while it's sleeping periodically
The solution is below.
I´m using LowPower.h and PinChangeInt.h libraries to put my Arduino into the sleep mode every 8 seconds and then it wakes up, modifies a counter and it goes to sleep again, but ...
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vote
1answer
64 views
Waking up async the Arduino while it's sleeping periodically
The solution is below.
I´m using LowPower.h and PinChangeInt.h libraries to put my Arduino into the sleep mode every 8 seconds and then it wakes up, modifies a counter and it goes to sleep again, but ...
1
vote
2answers
67 views
Same code in setup() and loop() give different results
As the answers to this question and this one state, setup() and loop() are identical in the way they execute code (apart from the obvious looping function of loop()).
However.
I get different ...
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0answers
44 views
How to upload sketch from Uno to Pro mini without removing Atmega328p
I know there's a lot of tutorials out there already about how to upload a sketch to Pro mini. However a lot of them doesn't exactly fit what I'm looking for.
What I'm looking for it a way to ...
0
votes
2answers
48 views
Cannot set Pins to LOW
I am controlling 2 motors from my Arduino Pro Mini and L293D motor driver module. Problem is, I have to set a pin high and after 1 second set it to LOW. But that doesn't happen... The pin just stays ...
1
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0answers
29 views
Board.txt configuration change Atmega328p
Hi I am trying to configure an Atmega328p to run with an 8MHz oscillator in part to reduce power consumption and so I don't need to have level shifters all over my project.
I have changed the board....
3
votes
1answer
77 views
Arduino Pro Mini RESET button suddenly stopped working
I am powering my Pro Mini(3.3V version) using an external battery (~6.5V 700mA) . I used to connect it to the RAW and GND pins on my pro mini and everything ran fine.
Today when I powered up my ...
1
vote
3answers
145 views
Arduino Pro Mini Serial Monitor garbage
This is my first post. I hope that I am posting in the right section of the forum. Otherwise, could an admin move this topic to the appropriate section please?
Board : Arduino Pro Mini 3.3V 8MHz
...
-1
votes
1answer
36 views
Arduino Pro Mini automatically resetting
I have an Arduino Pro Mini 3.3v in a robot. The problem is, the Mini would automatically randomly overwrite the uploaded sketch with the default blink sketch... And this is becoming quite a problem.
...
4
votes
1answer
40 views
delete the memory or re-upload a program
At the moment I am following the instructions of this project https://github.com/JoernL/LimiTTer. Besides the peripheral parts like a Bluetooth module and an NFC module, the central unit is an Arduino ...
0
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1answer
34 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 ...
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2answers
1k views
very lightweight low power microcontroller with memory?
I have build a couple of projects using arduino. For a new project I want to log skin surface temperature vs. time (just perhaps a few times per day) and possibly other easy to obtain info such as ...
6
votes
1answer
66 views
Trouble connecting Arduino Pro Mini (Atmega328, 3.3V) to nRF24L01 over SPI, receiving all 0 values when I use radio.printDetails();
I am trying to connect my Arduino Pro Mini 3.3V to an nRF24L01 transceiver and cannot see what I am doing wrong. I've checked my wiring a million times because the problem hints there is an invalid or ...
1
vote
4answers
176 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
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1answer
67 views
Eclipse C++ Ide for Arduino 2.0 and eeprom.h (no such file or directory)
I am using a Pro Mini and the Arduino Eclipse plugin. I have a project that is close to 1,000 lines of code and I am using things such as analogRead() and the u8g display library. Now I am at the ...
0
votes
2answers
119 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 ...
3
votes
2answers
219 views
Soldering Arduino Pro Mini's disaligned pins
I have a couples of Arduino Pro Minis (original from sparkfun) that have those 4 disaligned pin. Unfortunetely, I need to use 2 of them, A4 and A5, because they are the I2C pins and I want to solder ...
2
votes
2answers
86 views
Arduino mini pro as ISP for Atmega329P-PU serial monitor failing
After trying a lot of tutorials and manuals around the web including at least 20 solutions here on StackExchange, I don't know what to try anymore.
My goal is to write a message in the serial monitor ...
1
vote
1answer
71 views
How do I know if bootloader flash was successful?
I just bought a raw Atmega328p microcontroller. I am attempting to flash it with the Arduino bootloader.
The process seemed relatively straightforward as I had just followed the posted tutorial (...
0
votes
1answer
84 views
Can I convert 3.7V to 5V's using 3.3v to 5v converter
THe product: (https://www.sparkfun.com/products/12009)
So guys, here' s a pretty simple but important question for me:
Can I convert 3.7V (li-po battery's voltage level) to 5V's (I do have arduino ...
0
votes
0answers
50 views
Control the Power of a Raspberry Pi 3 using the RUN header?
I want to control the power of a Raspberry Pi 3 using an Arduino Pro Mini (the 3.3V version). I don't want to change anything on the board, except soldering the RUN header. I also can't put anything ...
0
votes
1answer
41 views
Control/switching of headphone audio
I need to do some simple line control of audio out from a phone, 3.5mm TRS. I would have preferred to use transistors, but the voltage drop on an already fairly weak signal makes it unusable. Also not ...
0
votes
1answer
17 views
Connection of Seeeduino GPRS with relay module [closed]
Good day. I'm working on home automation. I'm now at the implementation stage, where I want to assemble all the materials I need to use.
The materials are: Seeeduino GPRS (Arduino Leonardo), relay ...
0
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1answer
81 views
Arduino Pro Mini interrupts timer not working
i am trying to make an arduino pro mini sd card serial logger.The arduino should log the data that comes over the uart and write it to an sd card and if it is no data on the serial for 25 seconds to ...
0
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1answer
93 views
Yikes! Invalid device signature. Fail to burn bootloader and read fuses
I know this problem is kinda common but I had to post it anyway.
Before anything, I would like to inform you guys that I changed the fuse of my Arduino Pro 3v3 @ 8MHz to allow 1.8 V brownout and also ...
0
votes
1answer
51 views
Atmega328p clock and safe operation zone
im not used to write in english but i hope you guys can understand. I have some doubts about using the arduino pro mini 3v3@8Mhz
I know its possible to change the clock to 1 MHz with the fuses easily ...
3
votes
3answers
191 views
Arduino Project Power Consumption Calculations
I have built an automated window blind controller that will adjust the angle of a servo based on the value received via a light dependent resistor. Once every 10 minutes the MCU wakes up, gets the ...
0
votes
0answers
122 views
RC Switch with Arduino Pro Mini & 433MHz Receiver
I have downloaded the latest RC Switch library and uploaded the simple receive example to my arduino pro mini 3.3v with the receiver attached to pin 2, interrupt 0.
Testing it with my controller, ...
1
vote
2answers
295 views
Arduino Pro mini to CH340G Connection problem
I have worked with Arduino UNO but recently I bought a new Arduino Pro mini 5v 16M and a CH340G converter to work with. I have searched google to connect pins but I found examples that explains this ...
0
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1answer
50 views
Will Arduino Pro Mini 3.3V run at half the speed of 5V version?
Provided a very simple sketch like this:
void loop() {
digitalWrite(1, !digitalRead(1));
}
... should I expect 5V Arduino to run twice as fast as 3.3V, or are there some internal adjustments in ...
