Each Afero device will have a number of attributes associated with it. Attributes are identified by a 2-byte ID and can contain a variable amount of information based on the type of attribute. Attributes can come in many types and have specific ID ranges.
|ID||Description||Data Type||Usage Notes|
|1-1023||Afero Cloud, Device MCU||An attribute residing on an external MCU defined by the third-party developer. The size and meaning of these attributes are defined by the developer using the Afero Profile Editor. To get the default value of one of these attributes, the MCU must call
|1024||I/O 0 Value Attribute||Modulo LED:
|1026||I/O 1 Value Attribute||Configurable|
|1028||I/O 2 Value Attribute||Configurable|
|1030||I/O 3 Value Attribute||Modulo button|
|2001||Bootloader Version||SINT64||The bootloader is always the first thing to be upgraded as it is responsible for installing firmware images. This firmware type is used for the Afero Secure Hub and Afero Secure Radios.|
|2002||BLE Stack Version||SINT64||This is the Bluetooth stack for the radio module. This will likely never be updated, but is included here for completeness. If the stack is updated, the application must always be updated at the same time, before the device is rebooted.|
|2003||FW Application Version||SINT64||This is the radio module application responsible for reading the device description and handling attributes. This firmware type is used for the Afero Secure Hub and Afero Secure Radios.|
|2004||Device Description||SINT64||The description of the attributes for a particular Afero application.|
|2006||Wi-Fi||SINT64||This is the version for the Wi-Fi chip (e.g., WINC3400).|
|65001||UTC offset data||BYTES||Contains the current UTC offset in minutes, the next timestamp to change the UTC offset, and the new UTC offset to apply at the previous timestamp, in that order (2-bytes signed short, 4-bytes int, 2-bytes signed short).|
|65004||Configured SSID||UTF8S||The SSID the Afero Secure Hub is currently configured to use.|
|65005||Wi-Fi Bars||SINT8||Integer, read-only attribute for Wi-Fi signal strength, for UI purposes.|
|65006||Wi-Fi Steady State||SINT8||Wi-Fi steady state:
This value is used to communicate the Wi-Fi state to the apps outside the Wi-Fi setup.
This value will have a one-byte command followed by parameters, if any. The format of the last three bytes are dictated by the first byte. The device will return a two-byte array indicating the result of the command to the server. The first byte will be the command and the second byte will be the result:
Current commands are:
|65013||ASR State||SINT8||This byte will hold ASR state information, including:
||65014||Low Battery Warning||SINT8||
Applies to ASR-1 Only
This value will be updated by ASR-1 when the battery gets low. It will track the battery level as:
At 2.1 volts, the ASR-1 will power down to avoid problems such as flash corruption.
|65015||Linked Timestamp||SINT32||The timestamp when the peripheral linked with the Cloud (as set by the Cloud upon successful linking). This is a Unix Epoch timestamp, which is the number of seconds since 1/1/1970.|
A variable-length string of bytes in which the first two bytes represent a specific reason for the most recent boot by ASR, and the remainder provides context-dependent data used internally. The data is provided as ASCII. The reasons represented are shown below.
|65021||MCU Interface||SINT8||This attribute is required in the profile. The default value for this attribute is set by the Afero Profile Editor and any changes to the value at runtime are ignored. The following values are valid: