I'm building a climate control that opens and closes servos to introduce warm or cold air. I'm connecting it to a nextion display and so far it's going well but I'm stuck trying to understand how to pass variables between functions. I've set up a few global variables but one doesn't seem to be updat…

You have 2 different variables named fontcabintemp. One is s global and the other is declared in the measurefronttemp() function Updating one will not update the other

[image] everwild: void measurefronttemp() { // Read temperature as Fahrenheit (isFahrenheit = true) int frontcabintemp = dht.readTemperature(true); this create new local variable frontcabintemp, completely independent from global one. This frontcabintemp exists only until exit from meas…

[image] everwild: I'm stuck trying to understand how to pass variables between functions. Global variables do not have to be passed into or returned from functions as their value is available throughout the sketch. There is actually slightly more to it than that but that is good enough for n…

[image] everwild: int frontcabintemp = dht.readTemperature(true); Drop int

Noob global, local and pointed variables question

Projects Programming

groundFungus August 10, 2022, 9:49pm 4

Maybe this tutorial on scope will help.

Topic		Replies	Views
A good pattern for removing globals and guaranteeing that the serial port is set up before anything else Programming	29	480	September 24, 2026
Woher kommt der Wert? Deutsch	34	483	June 9, 2026
Passing over variables to loop() Programming	36	1077	May 2, 2025
Variable Passing Programming	20	308	November 27, 2024
Possible to pass variables from several functions to one function? Programming	6	822	May 19, 2020

Noob global, local and pointed variables question

Related topics