Midon design 1WSwitch Manuel d'utilisateur

midon design 1-Wire Application Guide v1.04 Page 1 of 41 1-Wire Application Guide 1-Wire Application Guide v1.04 January 30, 2015

1-Wire Application Guide v1.04 Page 10 of 41 Of course, the two main types of network topologies can be combined to achieve required results. Fig

1-Wire Application Guide v1.04 Page 11 of 41 cables have the red and green wires (and the yellow and black wires) reversed between connectors. 2

1-Wire Application Guide v1.04 Page 12 of 41 wiring. CAT-5 can be used for networks that are up to the maximum recommended reach for 1-Wire: 300

1-Wire Application Guide v1.04 Page 13 of 41 Sensors Texas Weather Instruments sensors N/C GND DQ GND N/C DC Supply RJ-12 Simon Atkins’ Hu

1-Wire Application Guide v1.04 Page 14 of 41 and the connections between the serial port and TEMP08. See the Trouble-shooting PC Problems section

1-Wire Application Guide v1.04 Page 15 of 41 3 Weather Monitoring 3.1 Types of Weather Sensors 1-Wire weather sensors are available from a var

1-Wire Application Guide v1.04 Page 16 of 41 The DS18B20 offers 9, 10, 11 or 12 bit resolution, or ± 0.5°C, ± 0.25°C, ± 0.125°C or ± 0.0625°C prec

1-Wire Application Guide v1.04 Page 17 of 41 There are lots of choices for temperature sensors available and all have slightly different character

1-Wire Application Guide v1.04 Page 18 of 41 however, later versions, such as those formerly available from AAG, and previously from Hobby Boards,

1-Wire Application Guide v1.04 Page 19 of 41 Figure 11 1-Wire Wind Direction Wind direction then becomes defined by the voltages reported from th

midon design 1-Wire Application Guide v1.04 Page 2 of 41 Table of Contents List of Tables ...

1-Wire Application Guide v1.04 Page 20 of 41 are known and wind direction is now absolute. There are two conditions when West might become East,

1-Wire Application Guide v1.04 Page 21 of 41 Table 3 ADS Wind Direction Conversion (Sorted by Voltage) Direction Voltage W 0.89-0.95 NW 1.54-1.

1-Wire Application Guide v1.04 Page 22 of 41 Indoor placement is also critical – don’t install non-HIH4021 sensors in a wet environment, for examp

1-Wire Application Guide v1.04 Page 23 of 41 Figure 15 Bray-Jennings Barometer This design was modified slightly over time, and the currently

1-Wire Application Guide v1.04 Page 24 of 41 Figure 16 Tim Bitson 1-Wire Barometer The Motorola MPX4115 device outputs a voltage proportional to

1-Wire Application Guide v1.04 Page 25 of 41 Figure 17 Tim Bitson 1-Wire Lightning Monitor Tim Bitson (see References) designed the original 1-W

1-Wire Application Guide v1.04 Page 26 of 41 Figure 19 Solar Sensor 2 As can be seen from the figures above, there are two types of solar sensor

1-Wire Application Guide v1.04 Page 27 of 41 4 Environmental Sensors 4.1 Relay Driver Midon Design offers 2 types of 1-Wire relay drivers. 1.

1-Wire Application Guide v1.04 Page 28 of 41 Figure 20 1WIO Input Wiring Up to 40 1WIO’s can be connected to TEMP08 in this manner. Mixing inpu

1-Wire Application Guide v1.04 Page 29 of 41 Figure 21 Using a 1-Wire Device as a Contact Sensor 4.3 Counter Sensor Counter sensors are useful

midon design 1-Wire Application Guide v1.04 Page 3 of 41 5.1.2 DooTemp08 ...

1-Wire Application Guide v1.04 Page 30 of 41 In Figure 22, the Flow counter could be as shown in Figure 23, a DLJ75C pulse counting water meter

1-Wire Application Guide v1.04 Page 31 of 41 directly proportional to the current flowing through whatever wire the CT3110 current probe is clampe

1-Wire Application Guide v1.04 Page 32 of 41 bus, make sure to disable wind direction reporting (which will allow the voltages from the DS2450 to

1-Wire Application Guide v1.04 Page 33 of 41 Table 4 Sensor Compatibility Compatibility Sources Sensor TEMP08 1WSwitch LOG08-II Midon Design AA

1-Wire Application Guide v1.04 Page 34 of 41 Unfortunately, Dallas Semiconductor, now known as Maxim, has begun to phase out some of the semicondu

1-Wire Application Guide v1.04 Page 35 of 41 5 Connecting To a PC 5.1 What software is available 5.1.1 HomeSeer HomeSeer is perhaps the most

1-Wire Application Guide v1.04 Page 36 of 41 The RS232 settings should be 9600 bps, no parity, eight bits, with no flow control. RS232 cables sho

1-Wire Application Guide v1.04 Page 37 of 41 Figure 25 HyperTerminal Port Settings If your software is still unable to work properly with TEMP08

1-Wire Application Guide v1.04 Page 38 of 41 Figure 26 Location of HyperTerminal Connect Button

1-Wire Application Guide v1.04 Page 39 of 41 6 References 1. “Transmitting Data and Power over a One-Wire Bus”, Dan Awtrey, Sensors Magazine, F

midon design 1-Wire Application Guide v1.04 Page 4 of 41 Figure 22 1-Wire Water Meter...

1-Wire Application Guide v1.04 Page 40 of 41 7 Glossary Term Description ADC Analog to Digital Converter DQ The input/output connection on a

1-Wire Application Guide v1.04 Page 41 of 41 8 Legal Notices © Copyright 2015 Midon Design. All rights reserved. No part of this document may be

1-Wire Application Guide v1.04 Page 5 of 41 1 Introduction Thank you for considering Midon Design's 1-Wire Serial interface: TEMP08. This

1-Wire Application Guide v1.04 Page 6 of 41 2 1-Wire Installations 2.1 1-Wire – What is it? 1-Wire® was a system originally developed by Dalla

1-Wire Application Guide v1.04 Page 7 of 41 Figure 1 1-Wire Bus Network A bus network is the simplest kind of network. It consists of a length

1-Wire Application Guide v1.04 Page 8 of 41 Figure 2 1-Wire Star Network A star network is somewhat more complex than a bus network. A typical s

1-Wire Application Guide v1.04 Page 9 of 41 Figure 3 1-Wire Star Network with Resistors 2.2.3 Bus and Star Networks Figure 4 1-Wire Bus and S