Include Our Free-to-use Code In Your Own Applications
To use any of Electric Imp’s code libraries, you need to follow these simple rules:
To include a library in your code, add a
#require statement to the top of your program, ahead of your application code. Library links are processed by impCentral™’s code compiler, not by Squirrel, which ignores any characters after a
The statement must include the name of the library you want, followed by a colon and then the required version number, all within double-quote marks. For example, to add version
1.2.0 of the Twitter class to your agent code, you would write:
#requirestatements must include a version number. If the version is omitted, the compiler will issue a build error.
The Electric Imp library system employs semantic versioning. Version numbers are written in the form:
x is the major version,
y the minor version and
z a patch version. Changes reflected in either the minor or patch values can safely be assumed not to alter the functionality and operation of the library — the changes will not break your code. However, major updates should be checked carefully as they may involve substantial changes to the library’s API that may require your own code to be modified.
For example, a small update to a library function which doesn’t change that function’s interface would be reflected by increasing the patch number. Refactoring one or more functions without changing their interfaces would warrant a new minor version. Removing a function or altering its interface to end compatibility with existing software would require a new major version.
Wildcards are not supported at this time, but you can provide a simple integer value. For example, ‘2‘ is equivalent to ‘2.0’ and ‘2.0.0’.
We suggest you mark as a favorite or follow GitHub repos of the libraries you are using to ensure you are notified when new versions of those libraries are released. The table below lists the most recent version number and will be updated as new versions are added. You can also check a library’s documentation on GitHub (links below) to get the latest version number and examine the library code, which is not displayed in impCentral.
The main list of available libraries indicates whether a given library is suitable for device code, agent code or both: some libraries must be implemented in both agent and device code, others can be used in either; check out the library’s own documentation. The list also provides a link to documentation.
If you experience an error using a library, check the following:
#require’d the same library multiple times? Each library should be included only once.
#requirestatements at the start of your code?
|Expected space||No space between #require and the library specifier||
|Missing library name||No library specifier after #require||
|Expected double quote||No quote marks at the start of the library specifier||
|Unterminated library specifier||No quote marks after the library specifier||
|Unexpected character after library specifier||Semi-colon or other character after the library specifier||
|Incomplete library specifier||Incorrectly named library||
|Invalid version number||Incorrectly specified version number||
|Invalid character in library name||Mis-named library||
|Duplicate require||Requesting the same library more than once||
|Require must precede code||All #require statements must come at the top of the code||
|Max requires exceeded||Requested more than 100 libraries|
|No such library||Non-existent library name in specifier|
|Could not load code for library||Error loading the library|