SDConfigFile

Introduction

SDConfigFile is an Arduino library to read Sketch settings from a configuration file on an SD card.

I wrote the library so that I didn't have to hard-code private WiFi settings in my Sketches. Instead, I have a config.cfg file on an SD card, that contains things like:

ssid=wickedOz
password=flyingMonkeys

Now I can change the WiFi settings, or any other configuration, by simply editing the SD card's config.cfg file.

Installation

To install SDConfigFile on Windows:

1. Run git bash (or whatever git client you like)
2. cd Documents/Arduino/libraries
3. git clone https://github.com/bneedhamia/sdconfigfile.git SDConfigFile
4. restart your Arduino IDE

To install SDConfigFile on Linux:

1. cd sketchbook/libraries
2. git clone https://github.com/bneedhamia/sdconfigfile.git SDConfigFile
3. restart your Arduino IDE

To use

See examples/SDConfigFileExample for a simple example Sketch and its .cfg file. See readConfiguration() in that sketch for the code that reads the settings from the .cfg file.

The basic flow of reading a configuration file is:

#include <SD.h>
#include <SDConfigFile.h>

SDConfigFile cfg;

SD.begin(...);
cfg.begin(...);
while (cfg.readNextSetting()) {
  if (cfg.nameIs("mySetting1")) {
    call cfg.copyValue(),
         cfg.getBooleanValue(), or
         cfg.getIntValue(), as appropriate;
  }
  ...do the same for the other setting names.
}
cfg.end();