IBLSS(3)

🌈 IBLSS — iButtonLink SmartSlave 🌈

okay bestie, buckle up. this is the IBLSS(3) page out of the One-Wire File System manual, and it's entirely about the iButtonLink SmartSlave. let's get into it 💅

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🎀 NAME 🎀

IBLSS — the iButtonLink SmartSlave. that's the whole vibe. section 3, One-Wire File System, iykyk.

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✨ SYNOPSIS ✨

🌡️ Wall-TH Humidity and Temperature Sensor 🌡️

FE [.]XXXXXXXX2X00[XX][/[ TH/humidity | TH/latesthumidity |
TH/temperature | TH/latesttemp | TH/led | firmware | subtype | address |
crc8 | id | locator | r_address | r_id | r_locator | type ]]

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🧚 FAMILY CODE 🧚

FE — that's it. that's the family code. slay.

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💖 SPECIAL PROPERTIES 💖

💧 TH/humidity

read-only, floating point. the humidity the chip read, at high resolution (~13 bits). unit is % relative humidity. negative values mean a condensing condition — lowkey dramatic, but that's literally what it means. the conversion takes about one second, so be patient with her. 🫶

TH/latesthumidity

read-only, floating point. the latest measured humidity. reading this node will never trigger a combined humidity/temperature conversion — no surprise side quests. it's intended for use after a previous read of the TH/temperature node, or in conjunction with /simultaneous/iblss.

🌡️ TH/temperature

read-only, floating point. the temperature the chip read, at high resolution (~13 bits). the units get selected from the invoking command line — peek at owfs(1) or owhttpd(1) for the choices. default is Celsius. conversion takes about one second.

TH/latesttemp

read-only, floating point. the latest measured temperature. reading this node will never trigger a combined humidity/temperature conversion. intended for use after a previous read of the TH/humidity node, or in conjunction with /simultaneous/iblss.

💡 TH/led

write-only, yes-no. switches the indicator LED on/off. that's the whole node. iconic. ✨

firmware

read-only, ascii. the firmware version of the Smart Slave, displayed as a major.major number. heads up though: firmware versions of the SS-WALL-TH before 1.4 had known issues with humidity reporting. not me warning you... okay yes, me warning you. 🙈

subtype

read-only, ascii. the subtype of the Smart Slave. right now the only possible value is "TH", which signifies an SS-WALL-TH drywall temperature/humidity sensor.

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⭐ STANDARD PROPERTIES ⭐

address, r_address

read-only, ascii. the entire 64-bit unique ID, given as upper case hexadecimal 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 — so if it looks backwards, it's not broken, it's just the flipped one. 💅

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 hexadecimal digits (0-9A-F).

family

read-only, ascii. the 8-bit family code. unique to each type of device. given as upper case hexadecimal digits (0-9A-F).

id, r_id

read-only, ascii. the 48-bit middle portion of the unique ID number — no family code, no CRC. given as upper case hexadecimal 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. this one 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 hexadecimal) 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? DEPRECATED bestie — it's in the retirement home, do not build your whole personality on it.

type

read-only, ascii. part name assigned by Dallas Semi. e.g. DS2401. alternative packaging (iButton vs chip) will not be distiguished.

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🚨 ALARMS 🚨

None. not a single one. nothing. silence. 💀

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🦋 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. obsessed. ⚡

each device is uniquely and unalterably numbered during manufacture. there's 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. range!! 👑

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 principle is to create a virtual filesystem, with the unique ID being the directory, and the individual properties of the device represented as simple files that can be read and written. everything is a file and honestly? we're obsessed. 😭

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 fundamental goal has been ease of use, flexibility and correctness rather than speed. periodt.

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🌸 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 hexadecimal, 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 — no vibes-based CRC here, sorry. 😭

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🔥 DATASHEET 🔥

https://www.ibuttonlink.com/products/ss-wall-th

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👑 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), InfernoEmbedded (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), MAX31826 (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 (3), EDS0066 (3), EDS0068 (3)

Moisture

• EEEF (3), DS2438 (3)

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🫶 AVAILABILITY 🫶

http://www.owfs.org

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💜 AUTHOR 💜

Paul Alfille <paul.alfille@gmail.com>, Jan Kandziora <jjj@gmx.de>. legends, honestly.

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and that's the whole page, bestie! this was IBLSS(3) from the OWFS Manpage, dated 2003 — so go read your sensors, hydrate, and remember that reading TH/latesttemp will never trigger a conversion. mwah 💋