mCM001(3)

✨ NAME ✨

okay so bestie, welcome to mCM001(3) — she's part of the One-Wire File System (OWFS for the girlies in the know 💅) and she is literally an AC Current Monitor. that's the whole vibe. periodt.

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🎀 SYNOPSIS 🎀

AC Amp meter, no cap.

A2 [.]XXXXXXXXXXXX[XX][/[ current | address | crc8 | id | locator |
r_address | r_id | r_locator | type ]]

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🌈 FAMILY CODE 🌈

A2

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💖 SPECIAL PROPERTIES 💖

current

read-write, floating point. literally just reads the current. iconic behaviour fr fr.

• Range — 0-5A
• Resolution — 0.01A
• Units — A (amperes)
• Frequency — AC (alternating current 50-60Hz)

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🦋 STANDARD PROPERTIES 🦋

address

r_address

read-only, ascii. it's the entire 64-bit unique ID, served 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. the way that reversals are a whole thing in this ecosystem, iykyk 😭

crc8

read-only, ascii. the 8-bit error correction portion, using a 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 doing math for you, say thank you 🫶

family

read-only, ascii. the 8-bit family code, unique to each type of device. 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 the CRC. 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 there's no Link Locator between the device and the master, the locator field will be all FF. r_locator is the locator in reverse order.

present (DEPRECATED)

🚨 DEPRECATED, bestie — she's giving legacy energy. still 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 distinguished. so don't come for her about the outfit, she doesn't clock it 🙈

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💀 ALARMS 💀

None. zero. nothing. not a single alarm to be found. blessed.

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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. yes, the data line is out here doing two jobs. main character energy fr 💅

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. like... a whole filesystem but the folders are devices? 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. she said cute and correct over fast, and honestly? valid.

mCM001

the mCM001 (3) is a Current meter from CMC Industrial Electronics. it is packaged for industrial use. she's got a hard hat on, she's ready to work 🧚

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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 improvising on the CRC, bestie, that's the rule 🚫

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⭐ WEBSITE ⭐

http://www.cmciel.com/products-solutions/individual-products/ac-current-sensor-mcm001/

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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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okay bestie that's the whole page, you ate that reading it 💅✨ this was the OWFS Manpage, dated 2003, and you just finished mCM001(3) — go forth and measure some current, you absolute icon 🦋💖🌸