Sep 17, 2019 · Yes, you can use "const float", but double and float are not the same. For AVR-based Arduinos, double and float are treated as equivalent, 32 bits in each case. #define is a text preprocessor command, and does not reserve any space for or define a variable.

Mar 17, 2019 · Hi friends! Maybe the next question is very basic, but I don't understand deeply the meaning of variable "float". If you search the definition of variable float in webpage of Arduino: float - Arduino Reference you can see the next: "(..) Floating point numbers are not exact, and may yield strange results when compared. For example 6.0 / 3.0 may not equal 2.0. You …

Jul 30, 2020 · Avoid using #define (a text-based symbol substitution) until you understand the problems that can arise when using it. I use const int to define an integer variable that is not allowed to change.

Jan 28, 2018 · const float R2 = 472000; no decimal point needed and the compiler gets the type information it needs. I have understand that const would be better than #define in this case. But the open source project that i am using (and trying to improve) all uses #define for all values that the end user are supposed to adjust to there specific hardware setup .

Jun 23, 2024 · Guru Meditation Error: Core 0 panic'ed (IllegalInstruction). Exception was unhandled ProjectsProgramming TeunS June 23, 2024, 12:43pm 1

Jan 13, 2021 · Let us start with the following floating point number: float y = 75.12345678; A floating point number has two parts: integer part (75) and fractional part (.12345678). 1. In programming, the keyword "float" is used to declare a floating point number. Here, the "data type" is float. 2. After the declaration of a floating point number (for example: float y = 75.12345678;), …

Oct 30, 2023 · #define LV_SPRINTF_USE_FLOAT 0 from 0 to 1 and in theory this will mean you can use %f in your sprintf formatting in lv_label_set_text_fmt command, however, it does not seem to work.

Oct 5, 2013 · Nice example code! I checked it, and wondered if you are using the correct location for the delay. In your code, you wait for each sensor to convert, so adding a large delay. But the delay is already in the library, called with the function requestTemperatures (). So you can get good readings with just one delay after printing all temps. Code change: relocate on singe }; a …

May 5, 2019 · Hey Ho I want to control 4 Float switches they show me status if on or off. Show them in Alexa to control Wifi switch AC Pump or magnetic valve. I have one ESP8266 to control that. For control float switch led is on or off I want to take onboard LED // Float switch #include <Arduino.h> #include <ESP8266WiFi.h> #include "fauxmoESP.h"

Mar 12, 2013 · pylon: Possibly "float" but it depends how the definitions are used later on. In this code it's just definition for the precompiler. How if i deleted "f" and just use the number? I found many definition like this, for example: #define GRAVITY 16384.0f #define SCALE_PID_PARAMS 1000.0f But i still confused what is the mean of "f"..