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Please use V4 Branch for your devices. The master branch is used for active development and may be instable

AskSin++ Build Status

C++ implementation of the AskSin protocol

  • easy configuration of the device channels by using templates
  • direct eeprom access for the channel data
  • AES signature support
  • Supported MCU:

Required additional Arduino libraries:

  • EnableInterrupt
    • For ATMega644 and ATMega1284 the PR #49 needs to be included
  • Low-Power
    • For ATMega644 and ATMega1284 the PR #57 needs to be included

Optional required Sensor Libraries

Enable AES Support

To enable the AES signature support USE_AES needs to be defined. In addition the default key and the default key index has to provided with HM_DEF_KEY and HM_DEF_KEY_INDEX.

#define USE_AES
#define HM_DEF_KEY 0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10
#deifne HM_DEF_KEY_INDEX 0

In FHEM you can get the key from the hmKey, hmKey2, hmKey3 attributes of the VCCU. The index is the key number multiplied by 2.

Extra Defines for Configuration

  • USE_WOR - enables WOR listening during idle (burst devices)
  • SENSOR_ONLY - save some byte by exclude code for actor devices
  • DEVICE_CHANNEL_COUNT - set number of device channels, skip calculation

Alternative Device RESET Method

Normally, a device can be reset to its default settings by pressing and holding down the config button for at least 6 seconds. Alternatively, another reset method can be used with ResetOnBoot.h without pressing the config button (i.e. for devices in hard to reach places):

  • to reset, reboot the device twice within 4 seconds after startup
    • explained in detail:
      • startup: the device led blinks with 5 Hz the first 4 seconds
      • if the device is restarted within this time, the device led blinks with 10 Hz for 4 seconds
      • only if the device is restarted again within this time, the device will do a RESET , otherwise it will proceed normal operation
  • implemented in HM-LC-SW1-BA-PCB.ino to demonstrate the usage
  • at least, an automated pairing can be triggered by uncommenting line #113