The current plan is to allow the adapter to be configured through a special serial string, this will set the target host and url and store them in the EEPROM. This should mean that the device can be used as is with no additional programming or changes.
In addition to the serial in and out the adapter has two status lines, busy and ready. These status lines can be used by the calling system to determine if its safe to send a message or not.
Some times web requests fail or the system will go wrong so in these cases the watchdog timer makes sure that any failure isn't permanent. As well as the watchdog there is a counter to track the number of failed requests in a row, if this exceeds a set limit the processor is reset to try and clear any potential problems with the adapter.