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

SEE ALSO¶

Programs¶

owfs (1) owhttpd (1) owftpd (1) owserver (1) owdir (1) owread (1) owwrite (1) owpresent (1) owtap (1)

Configuration and testing¶

owfs (5) owtap (1) owmon (1)

Language bindings¶

owtcl (3) owperl (3) owcapi (3)

Clocks¶

DS1427 (3) DS1904(3) DS1994 (3) DS2404 (3) DS2404S (3) DS2415 (3) DS2417 (3)

ID¶

DS2401 (3) DS2411 (3) DS1990A (3)

Memory¶

DS1982 (3) DS1985 (3) DS1986 (3) DS1991 (3) DS1992 (3) DS1993 (3) DS1995 (3) DS1996 (3) DS2430A (3) DS2431 (3) DS2433 (3) DS2502 (3) DS2506 (3) DS28E04 (3) DS28EC20 (3)

Switches¶

DS2405 (3) DS2406 (3) DS2408 (3) DS2409 (3) DS2413 (3) DS28EA00 (3)

Temperature¶

DS1822 (3) DS1825 (3) DS1820 (3) DS18B20 (3) DS18S20 (3) DS1920 (3) DS1921 (3) DS1821 (3) DS28EA00 (3) DS28E04 (3) EDS0064 (3) EDS0065 (3) EDS0066 (3) EDS0067 (3) EDS0068 (3) EDS0071 (3) EDS0072 (3)

Humidity¶

DS1922 (3) DS2438 (3) EDS0065 (3) EDS0068 (3)

Voltage¶

DS2450 (3)

Resistance¶

DS2890 (3)

Multifunction (current, voltage, temperature)¶

DS2436 (3) DS2437 (3) DS2438 (3) DS2751 (3) DS2755 (3) DS2756 (3) DS2760 (3) DS2770 (3) DS2780 (3) DS2781 (3) DS2788 (3) DS2784 (3)

Counter¶

DS2423 (3)

LCD Screen¶

LCD (3) DS2408 (3)

Crypto¶

DS1977 (3)

Pressure¶

DS2406 (3) -- TAI8570 EDS0066 (3) EDS0068 (3)

AVAILABILITY¶

http://www.owfs.org

AUTHOR¶

Paul Alfille (paul.alfille@gmail.com)