Posts Tagged ‘1-wire’

App note: Challenge and Response with 1-Wire® SHA Devices

Sunday, September 23rd, 2018

Another app note from Maxim Integrated about challenge-response security on 1-wire devices. Link here (PDF) Challenge-response can be a secure way of protecting access to any privileged material if implemented correctly. In this document, many options for challenge-response access control are discussed but the most secure method given is presenting...

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Temperature alarm for boiling milk

Tuesday, November 29th, 2016

Domen Ipavec shares his temperature alarm for boiling milk in the project log forum: Anyone who has ever boiled milk on the stove knows, that it has a nasty habit of overflowing. That is why I created the temperature alarm for boiling milk to be used my mother. The temperature...

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TinySensor server

Wednesday, July 1st, 2015

Steve's TinySensor server project, that is available at Github: Well after almost a year I decided it was time to update this project with improvements to both its hardware and software. On the hardware side, the server is still the original Raspberry Pi model B, but I've mounted the nRF24L01+ radio...

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Posted in R-Pi, sensors | No Comments »

App note: 1-Wire communication with PIC microcontroller

Saturday, January 17th, 2015

An application note (PDF!) from Microchip on 1-Wire communication with PIC microcontroller: This application note introduces the user to the 1-Wire® communication protocol and describes how a 1-Wire device can be interfaced to the PIC® microcontrollers. 1-Wire protocol is a registered trade mark of Maxim/Dallas Semiconductor. A software stack for the basic,...

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iButtonLink T-Sense 1-wire sensor (Maxim DS18B20) + PIC 18F14K22

Tuesday, January 6th, 2015

Chas over at PNW/Electronics writes: I came across a stash of iButton T-sense 1-wire sensors.. so I grabbed a couple and decided to check out 1-wire. Maxim makes a 1-wire device called the DS18B20. It’s a 9-12 bit temperature sensor with the possibility of being powered by parasitic power from...

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App note: Implementing an Isolated 1-Wire Bus

Saturday, October 19th, 2013

An app note from Maxim:  Implementing an Isolated 1-Wire Bus The 1-Wire® bus has become increasingly popular for the authentication and calibration of sensors and consumables in medical equipment, where galvanic isolation is required. Building on application note 4206, "Choosing the Right 1-Wire Master for Embedded Applications," this article explains...

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App note: Advanced 1-Wire Network Driver

Saturday, December 31st, 2011

This reference design shows how to drive long 1-Wire networks. 1-Wire is a communications protocol used by some Dallas/Maxim parts. The protocol uses only one wire for power, transmission, addressing, and synchronization. This document describes a microcontroller-based 1-Wire master interface for reliable operation of small, medium size and large 1-Wire...

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Posted in app notes | 3 Comments »

Bus Pirate: DS28EA00 temperature sensor demo

Monday, August 8th, 2011

wortelsoft demonstrates the DS23EA00 1-Wire digital thermometer using the Bus Pirate: The DS28EA00 is a, 1-wire temperature sensor. It features selectable 9/10/11/12 bit resolution with a typical accuracy of ±0.5°c, alarm function and user-programmable upper and lower trigger points. Special to this sensor are the two io pins which can...

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EEPROM with single pin interface

Monday, January 17th, 2011

Two years ago Microchip introduced serial EEPROMs with UNI/O. The speciality is the single pin data interface, so the memory chip needs only 3 pins including power. This can be great help for the smallest 6-pin microcontrollers like PIC10F or ATtiny10 series which doesn't have any non-volatile memory writable from...

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Posted in Chips | 1 Comment »

Free PCB Sunday: Bus Pirate demo board

Sunday, June 27th, 2010

We go through a lot of prototype PCBs, and end up with lots of extras that we’ll never use. Every Sunday we give away a few professionally-made PCBs from one of our past or future projects, or a related prototype. Our PCBs are made through Seeed Studio’s Fusion board service....

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Posted in Free PCBs | 22 Comments »

Bus Pirate IC test PCB

Tuesday, December 8th, 2009

A discussion in the forum led to the creation of a new chip demonstration/test PCB for the Bus Pirate. This board has spaces for several commonly-sampled I2C and 1-Wire devices, and an HD44780 LCD tester: I2C 24LC EEPROM (PTH and SMD) TC74 temperature sensor (PTH) DS1085(L)/DS1077(L) frequency generator (SMD) PCF8563/DS1307...

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Posted in Bus Pirate | 4 Comments »

Chips: 1-Wire iButton overview

Monday, November 23rd, 2009

See the latest version in the documentation wiki. Reliq sent a 1-Wire iButton demo using the Bus Pirate: I work in an engineering firm, and the large format color printer we have uses iButtons on the ink tanks to tell the machine what has been plugged in. These particular buttons...

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Posted in Bus Pirate, Chips | 3 Comments »

Bus Pirate: Binary 1-Wire mode

Tuesday, October 20th, 2009

See the latest version in the documentation wiki. The Bus Pirate’s new binary modes provide a consistent, logical way to script actions from Python, Perl, etc. We've already introduced the new binary bitbang, SPI, I2C, and UART modes. This post outlines the last planned binmode addition, 1-Wire functions. A completed...

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Bus Pirate: Chip demonstrations

Friday, August 14th, 2009

Here's a comprehensive list of Bus Pirate chip demonstrations. It includes Ian's old demonstrations from Hack a Day, and the most recent demos from Dangerous Prototypes. Tutorials are arranged by Bus Pirate hardware version. Bus Pirate v2&v3 Firmware v0g new feature demonstration PCF8563 real time clock calendar (I2C) ShiftBrite with...

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Posted in Bus Pirate | 1 Comment »

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