mAM001(3)

✨ mAM001(3) — the One-Wire File System's Analog Input Module ✨

okay bestie, gather round, because this is the manual page for mAM001 from the One-Wire File System (that's the OWFS fam, section 3 of the manuals, iykyk). it's a whole analog input module and honestly? she's giving industrial chic. let's get into it 💅

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🌸 NAME 🌸

mAM001 — Analog Input Module. that's it, that's the name, she's simple and she knows what she is 🎀

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🦋 SYNOPSIS 🦋

Voltage or current meter, pick your fighter:

B2 [.]XXXXXXXXXXXX[XX][/[ current | volts | address | crc8 | id |
locator | r_address | r_id | r_locator | type ]]

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💖 FAMILY CODE 💖

B2 — that's her family code, no cap. it's how you know she's one of the B2 girlies 🫶

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🔥 SPECIAL PROPERTIES 🔥

bestie, listen closely: volts and current are mutually exclusive and they get set by switches on the sensor case. so like, the sensor physically decides which one is real.

and here's the tea 🍵 — even though both volts and current will hand you a value, only one of the two is actually correct. which one? depends on the electrical connections and the switch settings. so don't come for me when you read the wrong one, the hardware said what it said 😭

⚡ current

• read-write, floating point
• Reads the current.
• Range: 0-20mA
• Resolution: 12 bit (5 uA)
• Units: A (amperes)
• Frequency: DC

🌈 volts

• read-write, floating point
• Reads the voltage.
• Range: 0-10V
• Resolution: 12 bit (2.5 mV)
• Units: V (volts)
• Frequency: DC

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⭐ STANDARD PROPERTIES ⭐

these are the properties every 1-wire device shows up with. the whole squad. the standard issue besties.

👑 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?
• > she's DEPRECATED bestie. still here, still answering, but the vibe is very much "legacy". don't build your whole personality on her.

🌸 type

• read-only, ascii
• Part name assigned by Dallas Semi. E.g. DS2401. Alternative packaging (iButton vs chip) will not be distinguished — so like, same device, different outfit, she doesn't clock it 🙈

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💅 ALARMS 💅

None. she has no alarms. unbothered. unalarmed. living her truth. periodt. ✨

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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 doing double duty, she's versatile like that 💅)

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. so many fit options, honestly iconic.

🗂️ 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... it's just files bestie, that's the whole magic ✨

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. so like, she's not the fastest girl in the room but she's correct, and that's the energy we're bringing 🌈

🌸 mAM001

The mAM001 (3) is a voltage or current meter from CMC Industrial Electronics. It is packaged for industrial use. she's got that rugged industrial aesthetic and she's thriving 💖

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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, she will not accept it 💀

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🌐 WEBSITE 🌐

http://www.cmciel.com/products-solutions/individual-products/analog-
input-mam001/

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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) — the icon, the moment, the legend who wrote all this down so we could read it in a terminal at 2am 👑

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and that's the whole page bestie!! 💖 this was OWFS Manpage, dated 2003, for mAM001 (3). go read some sensors, stay hydrated, and remember: only ONE of volts and current is telling the truth 🎀✨