Ubuntu Manpage: EEEF - HobbyBoards EE/EF Microprocessor-based slaves

Provided by: owfs-doc_2.8p15-1ubuntu4_all

NAME

       EEEF - HobbyBoards EE/EF Microprocessor-based slaves
       UVI - Ultra Violet (UV) Index sensor
       Moisture - Soild and Leaf moisture measurements

SYNOPSIS

       General EE device
       EE  [.]XXXXXXXXXXXX[XX][/[  temperature  |  version  |  type_number | temperature_offset |
       address | crc8 | id | locator | r_address | r_id | r_locator | type ]]

       UVI sensor
       EE [.]XXXXXXXXXXXX[XX][/[ UVI/UVI | UVI/UVI_offset | UVI/in_case | UVI/valid | temperature
       | version | type_number | temperature_offset ]]

       General EF device
       EF  [.]XXXXXXXXXXXX[XX][/[  version  |  type_number  |  address  |  crc8  | id | locator |
       r_address | r_id | r_locator | type ]]

       Moisture Meter
       Moisture/sensor.[0-3|ALL]

FAMILY CODE

       EE     Device with temperature

       EE     UVI

       EF     Device without temperature

       EF     Moisture Meter

TEMPERATURE PROPERTIES

   temperature
       read-only, floating point
       Temperature read every 30 seconds. Resolution .5C (uses an on-board DS18B20).  Temperature
       is only present in the EE-series devices.

   temperature_offset
       read-write, floating point
       Offset stored on device to apply to temperature readings.

UVI PROPERTIES

   UVI/UVI
       read-only floating point
       UV Index (ultraviolet index) in the range 0.0 to 16.0 resolution .1

       Only the UVI version of the EE device has a UVI sensor. Readings made every .5 seconds.

   UVI/UVI_offset
       read-write, floating point
       Signed offset to apply to the UVI measurement. Stored on-device non-volatile.

   UVI/in_case
       read-write, yes-no
       Flag to apply compensation for the protective case. Stored on-device non-volatile.

   UVI/valid
       read-only, yes-no Flag the the EE device type matches the known UVI type.

Moisture Meter

   moisture/sensor.0 .. moisture/sensor.3 moisture/sensor.ALL
       read-only integer
       Up to 4 sensors reading moisture can be attached.  OWFS addresses the sensors as 0 through
       3 while the datasheet uses 1-4.  Two types of external sensors are supported (and the data
       range):

       Watermark Soil Moisture Sensor
              0-199

       Leaf Wetness Sensor
              0-99

IDENTIFICATION PROPERTIES

   version
       read-only, ascii
       Firmware  version  for  the EE/EF device. Reported in HH.HH format where HH is a hex digit
       (0-9A-F).

   type_number
       read-only, integer
       Index of the type of sensor built into this device. Current known assignments:

       1      UVI (Ultraviolet index)

       2      Moisture meter

       3      Moisture meter with datalogger

       4      Sniffer

       5      Hub

STANDARD PROPERTIES

address
r_address
read-only, ascii
The entire 64-bit unique ID. Given as upper case hexidecimal digits (0-9A-F).
address starts with the family code
r address is the address in reverse order, which is often used in other applications and
labeling.

crc8
read-only, ascii
The 8-bit error correction portion. Uses cyclic redundancy check. Computed from the
preceding 56 bits of the unique ID number. Given as upper case hexidecimal digits (0-9A-
F).

family
read-only, ascii
The 8-bit family code. Unique to each type of device. Given as upper case hexidecimal
digits (0-9A-F).

id
r_id
read-only, ascii
The 48-bit middle portion of the unique ID number. Does not include the family code or
CRC. Given as upper case hexidecimal digits (0-9A-F).
r id is the id in reverse order, which is often used in other applications and labeling.

locator
r_locator
read-only, ascii
Uses an extension of the 1-wire design from iButtonLink company that associated 1-wire
physical connections with a unique 1-wire code. If the connection is behind a Link Locator
the locator will show a unique 8-byte number (16 character hexidecimal) starting with
family code FE.
If no Link Locator is between the device and the master, the locator field will be all FF.
r locator is the locator in reverse order.

present (DEPRECATED)
read-only, yes-no
Is the device currently present on the 1-wire bus?

type
read-only, ascii
Part name assigned by Dallas Semi. E.g. DS2401 Alternative packaging (iButton vs chip)
will not be distiguished.

ALARMS

       None

DESCRIPTION

1-Wire
1-wire is a wiring protocol and series of devices designed and manufactured by Dallas
Semiconductor, Inc. The bus is a low-power low-speed low-connector scheme where the data
line can also provide power.

Each device is uniquely and unalterably numbered during manufacture. There are a wide
variety of devices, including memory, sensors (humidity, temperature, voltage, contact,
current), switches, timers and data loggers. More complex devices (like thermocouple
sensors) can be built with these basic devices. There are also 1-wire devices that have
encryption included.

The 1-wire scheme uses a single bus master and multiple slaves on the same wire. The bus
master initiates all communication. The slaves can be individually discovered and
addressed using their unique ID.

Bus masters come in a variety of configurations including serial, parallel, i2c, network
or USB adapters.

OWFS design
OWFS is a suite of programs that designed to make the 1-wire bus and its devices easily
accessible. The underlying priciple is to create a virtual filesystem, with the unique ID
being the directory, and the individual properties of the device are represented as simple
files that can be read and written.

Details of the individual slave or master design are hidden behind a consistent interface.
The goal is to provide an easy set of tools for a software designer to create monitoring
or control applications. There are some performance enhancements in the implementation,
including data caching, parallel access to bus masters, and aggregation of device
communication. Still the fundemental goal has been ease of use, flexibility and
correctness rather than speed.

EE / EF
The EEEF (3) are a reference platform of microprocessor based 1-wire slaves. In general
they require external power, and have an on-board index for the specific capabilities.
They are designed by Eric Vickery at HobbyBoards.com

The EE class device uses family code EE and has an included temperature sensor. The EF
devices have no temperature sensor,

UVI
The UVI sensor is an implementation of the EE class device with Ultra Violet Index
sensing. All it's specific properties are in the UVI/ directory.

ADDRESSING

       All 1-wire devices are factory assigned a unique 64-bit address. This address  is  of  the
       form:

       Family Code
              8 bits

       Address
              48 bits

       CRC    8 bits

       Addressing under OWFS is in hexidecimal, of form:

              01.123456789ABC

       where 01 is an example 8-bit family code, and 12345678ABC is an example 48 bit address.

       The dot is optional, and the CRC code can included. If included, it must be correct.

DATASHEET

       http://www.hobby-boards.com/catalog/links/uvi2-r1/UVI%20Meter%20User%20Manual.pdf
       http://www.hobby-boards.com/download/manuals/Moisture%20Meter.pdf

AVAILABILITY

       http://www.owfs.org

AUTHOR

       Paul Alfille (paul.alfille@gmail.com)