> 4.4 | Handling Interfaces and Data Service Resources

> To develop Java applications the developer must know which resources, data services and hardware access are available.

> • | There are multiple AT parsers available

> • | There is hardware access over

> - | two serial interfaces: ASC1 and ASC0 (both fully accessible).

> - | general purpose I/O. To configure the hardware access, please refer to [1] and [2].

> - | I2C/SPI

> - | All restrictions of combinations are described in Section 4.4.1

> • | A Java application has:

> - | instances of the AT command class, one with CSD and the others without, each of which would, in turn, be attached to one of the AT parsers.

> - | two instances of access to a serial interface, ASC0 and ASC1, through the CommConnection API. Access to the control lines of these interfaces through CommConnectionControlLines (TC65 only).

> - | System.out over any serial interface or into the file system