Questions tagged [pinmode]
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10 questions
2 votes
2 answers
863 views
How can I stop digital pins from floating at reboot?
I've got a LattePanda 3 Delta, which runs windows on its main processor and an Arduino sketch called StandardFirmata on its coprocessor. It's connected to a lock, which locks at HIGH and unlocks at ...
- 21
0 votes
2 answers
417 views
How to Identify pins connected to each other?
There is probably another way to achieve what I want without connecting pins to each other, so I will explain the scenario: I am trying to build an Arduino based Enigma Machine. The cryptography is ...
- 23
0 votes
1 answer
83 views
Sketch halts if button is pressed on boot
I have a KY-040 rotary encoder with a push button wired to an ESP8266. My objective is to be able to detect if the button is pressed or not on boot. In the below code, if I hold the button down and ...
2 votes
1 answer
820 views
Setting pinmode() in header file
I am trying to have a header file to handle all my pin definitions and pinmodes. This is the header: #ifndef __HEADER_TESTER__ #define __HEADER_TESTER__ #include <SoftwareSerial.h> const byte ...
- 1,435
-1 votes
1 answer
482 views
Use same pin for two purposes
I have only one pin available and I'd need to use it both for a digitalRead and for sending serial messages (assigning it the Tx role within a SoftwareSerial). I can alternate these two operations, ...
- 101
2 votes
1 answer
185 views
Safe to solder a slide switch to unused GPIO pins?
I have a Digispark Rev.3 Kickstarter with ATTiny85 (see pinout below) and a three pin slide switch (see example below). I want to use the slide switch to control a task running on the Digispark, with ...
- 105
-1 votes
1 answer
151 views
Arduino as Multiplexer
This is a kind of an experiment, I just have a question on how Arduino ports work. Consider this sample: there is this target device that I'm trying to control with Arduino. The device uses a typical ...
- 101
0 votes
1 answer
76 views
Can pin mode damage Arduino with connected electronics?
I am not that experienced with electronics, so this might be a silly question. But I dont know. Assume that I have connected some electronic circuit (transistors, leds, anything else) to the Arduino ...
- 113
1 vote
1 answer
499 views
Accessing Physical Pins in Arduino Due from Arduino IDE
It is possible to access the Physical Pin 93, Pin PC11 on ATSAM3X8E in Arduino Due from the Arduino IDE? I am programming a Barebone ATSAM3X8E, and it do not seems to be allocated by Arduino Due nor ...
- 337
0 votes
1 answer
223 views
Is it possible for the Arduino's digital pin mode to flip from OUTPUT to INPUT unexpectedly?
I have an Arduino project (data logger intended to sample 100 samples per second for months) with firmware that is too long to post. It mostly works as supposed to, but I have a confusing issue I can'...
- 257