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Install instructions
Examples & UsageBootable CD Filesystem (owfs) Web Server (owhttpd) Backend Server (owserver) Perl bindings (owperl) Python bindings (owpython) PHP bindings (owphp) Tcl bindings (owtcl) Download Daily Configured Package CVS -- newest CVS Statistics FAQ 1-wire
wireless 1-Wire Hardware Adapters
OWFS ProjectFamily Codes Supported Devices DS1822 DS18B20 DS18S20 DS1921 Thermachron DS1977 DS1991 DS1992 DS1993 DS1995 DS1996 DS2401 DS2405 DS2406 DS2408 DS2409 DS2413 DS2415 DS2417 DS2423 DS2431 DS2433 DS2436 DS2438 DS2450 DS2502 DS2505 DS2506 DS2720 DS2740 DS2751 DS276X DS2770 DS2780 DS2804 DS2890 LCD Thermocouples |
Table of Contents
NameDS2415 - 1-Wire Time ChipDS1904 - RTC iButton DS2417 - 1-Wire Time Chip with Interrupt SynopsisReal time clock.24 [.]XXXXXXXXXXXX[XX][/[ date | flags | running | udate | address | crc8 | id | locator | present | r_address | r_id | r_locator | type ]]
Family Code24 DS2415 DS1904 27 DS2417 Special Propertiesdateread-write, ascii26 character date representation of the counter value. Increments once per second while running Setting date to a null string will put the current system time. Accepted date formats are: Sat[urday] March 12 12:23:59 2001 Apr[il] 4 9:34:56 2002 3/23/04 23:34:57 current locale setting (your system’s format) enableread-write, yes-noState of the timer interrupt. 0=off 1=running. intervalread-write, unsigned integerInterval between timer interrupts. Values: 0-7. See table under DESCRIPTION for interpretation. itime will reflect the interval chosen. itimeread-write, unsigned integerInterval between timer interrupts. Value in seconds. See table under DESCRIPTION for interpretation and acceptable values. interval will reflect the itime chosen. flagsread-write, unsigned integerGeneral use data. 4 bits (0-15 accepted values). runningread-write, yes-noState of the clock. 0=off 1=running. udateread-write, unsigned integerTime represented as a number. udate increments once per second, while running is on. Usually set to unix time standard: number of seconds since Jan 1, 1970. The date field will be the unix representation of udate and setting either will change the other. Standard Propertiesaddressr_addressread-only, asciiThe 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. crc8read-only, asciiThe 8-bit error correction portion. Uses cyclic redundancy check. Computed from the preceeding 56 bits of the unique ID number. Given as upper case hexidecimal digits (0-9A-F). familyread-only, asciiThe 8-bit family code. Unique to each type of device. Given as upper case hexidecimal digits (0-9A-F). idr_idread-only, asciiThe 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. locatorr_locatorread-only, asciiUses 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. presentread-only, yes-noIs the device currently present on the 1-wire bus? Note, this means that each hex byte (2 characters) is reversed, not the text string. typeread-only, asciiPart name assigned by Dallas Semi. E.g. DS2401 Alternative packaging (iButton vs chip) will not be distiguished. AlarmsNone implemented.Description1-Wire1-wire is a wiring protocol and series of devices designed and manufactured by Dallas Semicondictor, Inc. The bus is a low-power low-speed low-connector scheme where the data line can also provide power.Each device is uniquely unalterably numbered during manufacture. There is a wide variety of devices, including memory, sensors (humidity, temperature, voltage, contact, current), switches, timers, loggers, and more complex devices (like thermocouple sensors) can be built wit hte basic devices. There are also 1-wire devices that have encryption included. The 1-wire bus is accessed via one of a number of serial, parallel or USB adapters. OWFS designOWFS is a suite of programs that fundementally 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 files.There is optional data caching to improved performance, but possible confusion over stale data. Ds2415 Ds1904The DS2415 (3) and DS1904 (3) are simple clocks that can be read on the 1-wire bus. They can also be used the time an event, for remote confirmation.
Ds2417The DS2417 has the same clock function, but also includes a programmable interval interrupt. Values Allowed are:0 1sec 1 4sec 2 32s = .5m 3 6 = 1m 4 2048s = .5h 5 4096s = 1h 6 65536s = 18h 7 131072s = 36h AddressingAll 1-wire devices are factory assigned a unique 64-bit address. This address is of the form:
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. Datasheethttp://pdfserv.maxim-ic.com/en/ds/DS2415.pdfhttp://pdfserv.maxim-ic.com/en/ds/DS1904.pdf http://pdfserv.maxim-ic.com/en/ds/DS2417.pdf See AlsoProgramsowfs (1) owhttpd (1) owftpd (1) owserver (1)Language bindingsowtcl (3) owperl (3)ClocksDS1427 (3) DS1904(3) DS1994 (3) DS2404 (3) DS2404S (3) DS2415 (3) DS2417 (3)IDDS2401 (3) DS1990A (3)MemoryDS1982 (3) DS1985 (3) DS1986 (3) DS1991 (3) DS1992 (3) DS1993 (3) DS1995 (3) DS1996 (3) DS2431 (3) DS2433 (3) DS2502 (3) DS2506 (3) DS2804 (3)SwitchesDS2405 (3) DS2406 (3) DS2408 (3) DS2409 (3) DS2413 (3)TemperatureDS1822 (3) DS18B20 (3) DS18S20 (3) DS1920 (3) DS1921 (3) DS1821 (3)HumidityDS1922 (3)VoltageDS2450 (3)ResistanceDS2890 (3)MultifunctionDS2436 (3) DS2438 (3) DS2760 (3)CounterDS2423 (3)LCD ScreenLCD (3) DS2408 (3)CryptoDS1977 (3)Availabilityhttp://owfs.sourceforge.netAuthorPaul Alfille (palfille@earthlink.net)
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