Questions tagged [code-optimization]

The process of improving the efficiency of a program such that is uses less memory and/or less computational time.

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FIltering, FXOS8700, FXAS21002C optimization

I'm working on an inverse pendulum project, and am using an adafruit NXP_FXOS8700_FXAS21002 along with an Arduino due, and an esp8266 (two separate projects, same code however). I'm using a Magdwick ...
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Why does the program size increase so drastically with these switch-cases?

EDIT: The problem is my op-code catch is op >= 0x20 || op <= 0x2F rather than op >= 0x20 && op <= 0x2F and so most of the switch-case was being optimised away! This is a really ...
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Sending data from webserver to Arduino

Hello Arduino enthusiasts! I've been working on a keypad lock system for school lately and I need some advice.Basically, my code checks if the entered passcode is the same than a predefined passcode ...
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Plant irrigation system

I'm very new to the Arduino game I wanted to make a small auto watering system for my plants. I bought these items 5V 1 CHANNEL RELAY MODULE FOR ARDUINO PIC AVR DSP ARMB 9 VOLT BATTERY SNAP ...
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Dragino Lora shield for Arduino sensor use

I am new to arduino and lora technology and i have dragino lorashield for arduino Uno and dragino gateway. I have also MQ-3 gas sensor and I want to detect the alcohol value and to send it to the ...
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2answers
26 views

multiple invdividual servo controll arduino

I want to declare 11 servo motors in my code. Is there a better way to do that than just declare everyone under each other. The reason is that i have a code that will set the rotation for one at a ...
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171 views

Optimizing Teensy 3.6 for data sampling?

So, I have a very basic project where I cycle through 8 IR individual transmitters. After setting the individual transmitter high, I cycle through all 8 IR receivers and print their values, RX_CYCLES ...
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Combining sketches

I have two codes for my to sensors and they work separately. However, I need to combine them in one program please can you help? The pulse code /* PulseSensor Starter Project and Signal Tester * ...
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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 ...
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1answer
178 views

Optimizing for speed using const, static, constexpr etc in a function

In an ISR I want to keep things quick. At the same time I want to limit variable scope. Storage space is not a factor. I have this line: const char trigs[] = "aAbBcCdDeEfFgGhHiIjJ"; When this is ...
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SD Library writing char in a file

I'm trying to write into a file using this code from the example of the library: String dataString = ""; int sensor = 0; dataString += String(sensor); dataString += ","; sensor +=1; File dataFile = ...