DS2405(3)

💅 DS2405 💅

okay bestie, welcome to the One-Wire File System manual, and today's main character is DS2405 — the Addressable Switch. she's little, she's old-school, and she controls other stuff. periodt. 🎀

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🌈 SYNOPSIS 🌈

a 1-wire network branch controller. that's her whole job. iconic.

05 [.]XXXXXXXXXXXX[XX][/[ PIO | sensed | address | crc8 | id | locator |
r_address | r_id | r_locator | type ]]

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🦋 FAMILY CODE 🦋

05

like, that's her family code. that's her ✨identity✨. no cap.

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🍓 SPECIAL PROPERTIES 🍓

these are the ones that make her her, yk?

🎀 PIO

read-write, yes-no.

the state of the open-drain output (PIO) pin. 0 = non-conducting (off), 1 = conducting (on).

writing zero will turn off the switch, non-zero will turn on the switch.

reading the PIO state will return the switch setting. and if you wanna know the actual logic level at the switch? go look at the sensed property. iykyk. 💅

🎀 sensed

read-only, yes-no.

the logic level at the PIO pin. 0 = ground. 1 = high (~2.4V - 5V). ngl this really makes sense only if the PIO state is set to zero (off) — otherwise she'll read zero. so like, vibe check accordingly. 😭

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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. 🫶

🧚 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). she's the little checksum bestie keeping things honest. 💖

🧚 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. does not include the family code or 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.

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?

bestie it's literally marked DEPRECATED in the original. i'm just the messenger. 🫠

🧚 type

read-only, ascii.

part name assigned by Dallas Semi. e.g. DS2401. alternative packaging (iButton vs chip) will not be distinguished. she does not care about the fit, only the silicon. 💀

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💜 ALARMS 💜

none implemented. not a single one. zero. nada. 🙈

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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. literally data and power sharing one wire, it's giving efficiency. 🔥

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. fancy.

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 are represented as simple files that can be read and written. filesystem as a vibe. 👑

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. correctness ate and left no crumbs. 💅

⭐ DS2405

the DS2405 (3) allows control of other devices, like LEDs and relays. it is an early design and has been superseded by the DS2406 and DS2408 or even DS2450 that have more PIO pins, and do not employ an arcane use of the alarm state to signal PIO status. so yeah, she's a legacy queen, but the youngers are out here with more pins and less weirdness. 🎀

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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. must. no skipping the CRC and hoping for the best, bestie. 😤

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📄 DATASHEET 📄

http://pdfserv.maxim-ic.com/en/ds/DS2405.pdf

go read the primary source, she's right there. 🫶

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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)

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and that's the whole page, bestie!! 💖 this was the OWFS Manpage, dated 2003, and you just read DS2405 (3). go forth and switch things on and off responsibly. slay. ✨👑🦋