mDI001(3)

💖 mDI001 — Digital Input Module 💖

okay bestie, sit down, hydrate, and let me tell you about mDI001 from the One-Wire File System (OWFS) fam. She's a digital input module and she is, lowkey, the moment. 🌸

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✨ NAME ✨

mDI001 — Digital Input Module. that's her. that's the whole name. iconic. 💅

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🎀 SYNOPSIS 🎀

monitor 4 digital lines

A5 [.]XXXXXXXXXXXX[XX][/[ switch_closed.[0-3|ALL|BYTE] |
loop_open.[0-3|ALL|BYTE] | loop_shorted.[0-3|ALL|BYTE] | address | crc8
| id | locator | r_address | r_id | r_locator | type ]]

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💫 FAMILY CODE 💫

A5

that's it. that's the code. memorize it, bestie. 👑

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🌈 SPECIAL PROPERTIES 🌈

these are the ones that make her her, you know? main character properties only.

switch_closed.[0-3|ALL|BYTE]

• read-only, yes-no
• is the relay closed? (1=yes, 0=no). 🫶

⚠️ note that OWFS uses 0 through 3 as the index and the datasheet uses 1 through 4. do NOT get caught slipping on this one, it's giving off-by-one energy. 💀

loop_shorted.[0-3|ALL|BYTE]

• read-only, yes-no
• is the loop shorted? (1=yes, 0=no). failsafe mode. 🚨

⚠️ note that OWFS uses 0 through 3 as the index and the datasheet uses 1 through 4. same deal as above, bestie. keep your indices straight. 🙈

loop_open.[0-3|ALL|BYTE]

• read-only, yes-no
• is the loop open? (1=yes, 0=no). failsafe mode. 🚨

⚠️ note that OWFS uses 0 through 3 as the index and the datasheet uses 1 through 4. three for three on this note, it's literally a pattern. ✨

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👑 STANDARD PROPERTIES 👑

the classic lineup. every 1-wire device has some version of these and honestly? slay.

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). 🔥

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. DEPRECATED. it's still in the manual, it's still listed, but she's retired. don't build your whole personality on it, k?

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. she's chill like that. ✨

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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. ⚡

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 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. 📁✨

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. 🫶

mDI001

the mDI001 (3) is used to monitor digital lines for simple switching. 🎀

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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 cap: if you include the CRC and it's wrong, it's wrong. OWFS is not gonna hold your hand on that one.

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🌐 WEBSITE 🌐

http://www.cmciel.com/products-solutions/individual-products/4-channel-fail-safe-digital-module-mdi001/

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 one came out of the OWFS Manpage, dated 2003, and it's literally the mDI001(3) page. go forth and monitor those digital lines. slay. 💅✨🦋