NBB-800
User Manual for NRSW version 4.5.0.100
5.7. SERVICES
5.7.1. SDK
NetModule routers are shipping with a Software Development Kit (SDK) which offers a simple and fast
way to implement customer-specific functions and applications. It consists of:
1. An SDK host which defines the runtime environment (a so-called sandbox), that is, controlling
access to system resources (such as memory, storage and CPU) and, by doing so, catering for
the right scalability
2. An interpreter language called arena, a light-weight scripting language optimized for embedded
systems, which uses a syntax similar to ANSI-C but adds support for exceptions, automatic
memory management and runtime polymorphism on top of that
3. A NetModule-specific Application Programming Interface (API), which ships with a comprehen-
sive set of functions for accessing hardware interfaces (e.g. digital IO ports, GPS, external
storage media, serial ports) but also for retrieving system status parameters, sending E-Mail or
SMS messages or simply just to configure the router
Anyone, reasonably experienced in the C language, will find an environment that is easy to dig in.
However, feel free to contact us via router@support.netmodule.com and we will happily support you in
finding a programming solution to your specific problem.
The Language
The arena scripting language offers a broad range of POSIX functions (like printf or open) and
provides, together with tailor-made API functions, a simple platform for implementing any sort of appli-
cations to interconnect your favourite device or service with the router.
Here comes a short example:
/* We are going to eavesdr op on the first serial port
* and turn on lights via a digital I /O output port ,
* otherw ise we 'd have to send a short message .
*/
f o r ( atte mpts = 0; attemp ts < 3; attempts ++) {
if ( nb_serial_read ( " ser ial0 " ) == " Knock Knock !") {
nb_serial_wri t e ( " serial0 " , " Who 's there ? ");
if ( nb_serial_read ( " ser ial0 " ) == " Santa ") {
printf (" Hurray !\n " );
nb_di o_set ( " out1 " , 1) ;
}
}
}
nb_sms _send (" +12345678 9 " , " No presents this year :( " )
A set of example scripts can be downloaded directly from the router, you can find a list of them in the
appendix. The manual which can be obtained from the NetModule support web page gives a detailed
introduction of the language, including a description of all available functions.
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