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1WSwitch User Guide Version 1.02 Page 1 of 28
A 1-Wire Serial Interface
1WSwitch
Figure 1 1WSwitch
1WSwitch User Guide Version 1.02
November 18, 2008
midon design
1WSwitch User Guide Version 1.02 Page 2 of 28
1. Table of Contents
1. Table of Contents ..........................................................................................2
1.1. List of Tables ..........................................................................................3
1.2. List of Figures .........................................................................................3
2. Introduction....................................................................................................4
3. Installation......................................................................................................6
4. Using 1WSwitch.............................................................................................7
5. Using 1-Wire Switch Sensors ........................................................................9
6. 1WSwitch Commands .................................................................................10
6.1. Using the SET Command .....................................................................12
6.2. The DIS Display Output ........................................................................13
6.2.1. DIS output explanations ................................................................13
6.3. Using the EEP and MEM Commands...................................................14
6.4. TMP Output Display .............................................................................14
6.5. Missing Sensor Display ........................................................................15
6.6. Options .................................................................................................16
6.6.1. On Board ADC Display (DAD).......................................................16
6.6.2. Once Per Minute Time Display (DTI).............................................16
6.6.3. Enable DS2408 Input Poll (EIN) ....................................................16
6.7. DS2408 Based Relay and LED Usage .................................................17
7. J5 Usage .....................................................................................................18
8. Software Change History.............................................................................20
8.1. Upgrading 1WSwitch Software .............................................................20
8.2. Upgrade Instructions ............................................................................20
9. Trouble-Shooting Problems with 1WSwitch .................................................22
10. Error Messages........................................................................................23
11. 1WSwitch Schematic ...............................................................................24
12. 1-Wire Sensors ........................................................................................25
13. Legal Disclaimer.......................................................................................28
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1WSwitch User Guide Version 1.02 Page 3 of 28
1.1. List of Tables
Table 1 1WSwitch Command List .......................................................................10
Table 2 EIN Settings Recommended..................................................................17
Table 3 RJ-12 Pin-outs in use.............................................................................18
Table 4 1WSwitch Software History....................................................................20
Table 5 Common 1WSwitch Problems and Resolutions.....................................22
Table 6 1WSwitch Error Messages.....................................................................23
Table 7 Reset Type Messages ...........................................................................23
Table 8 Midon Design – Available/Compatible Sensors .....................................26
1.2. List of Figures
Figure 1 1WSwitch................................................................................................1
Figure 2 Location of Connectors...........................................................................6
Figure 3 DS2405 or DS2406 Applications ............................................................9
Figure 4 Connector J5 RJ-12 Pin-out..................................................................18
Figure 5 1WSwitch Top View..............................................................................21
Figure 6 1WSwitch Schematic ............................................................................24
Figure 7 DS2405 Pinout......................................................................................25
Figure 8 DS2406 & DS2407 Pinout ....................................................................25
Figure 9 DS2408 Pinout......................................................................................26
Figure 10 DS2438 Pinout....................................................................................26
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1WSwitch User Guide Version 1.02 Page 4 of 28
2. Introduction
Thank you for your purchase of the 1WSwitch 1-Wire Serial Interface. The
following instructions will assist you in configuring and operating the product.
1WSwitch is a stand-alone 1-Wireinterface providing standard serial
commands to control the Dallas/Maxim 1-Wire bus and some specific devices
used on it. Sensors can be polled on a regular basis (from 1 to 99 minutes), or
manually interrogated.
In a typical application, 1WSwitch is connected to a serial port on a PC. Serial
interface software is then used to gather the data received from 1WSwitch and
process it. Users have interfaced 1WSwitch into the HomeSeer product, which
can be used to automate lights, HVAC, sprinklers, and other devices, based on
the sensor readings from 1WSwitch.
The 1WSwitch provides a serial interface for the following 1-Wire devices:
• Multiple DS2438-based Voltage Sensors
• Multiple DS2405 input/output sensors
• Multiple DS2406 (or DS2407) input/output sensors
• Up to 20 1WIO relay interface modules (or equivalent DS2408 based relay module)
available from Midon Design
• Up to 10 1WIO LED modules (available from Midon Design)
• One 1WIO Input module (available from Midon Design)
1WSwitch has the following features:
• Real-time display of state changes for DS2405, DS2406 or DS2407 sensors
• On-board voltage sensor.
• Jumper-less provisioning - all configuration settings are stored in non-volatile memory
• Up to 60 1-Wire are sensors supported
• Simple instruction set with a Help prompt for recalling command names
• Easy to delete sensors, if they are no longer required, using the DEL command
• 1-Wire bus errors are flagged when they occur
• Continuous poll for ALL sensors - 1WSwitch will notify you when any switch sensor has
changed state or is connected or disconnected, providing that they have been previously
registered by 1WSwitch via the INI command. Very useful for locating intermittent 1-Wire
bus problems or for real-time polling of contact sensors.
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1WSwitch User Guide Version 1.02 Page 5 of 28
• Manual Poll of sensor readings. While 1WSwitch is normally used for continuous (from 1
to 99 minute intervals) polling of sensor readings, it can also be used manually to take
sensor readings on command from the serial interface.
midon design
1WSwitch User Guide Version 1.02 Page 6 of 28
3. Installation
To complete this project, you will need to connect a 12 to 16 Volt (AC or DC)
transformer to the terminal J1 (see Figure 2 for the location of J1). If you intend
to power 1WIO relay units from the 12V output of 1WSwitch, the transformer
needs to supply at least 350mA (250mA for 1WIO and 100mA for 1WSwitch) per
1WIO relay unit, up to a maximum of 800mA, or 2 1WIO relay units. Beyond
that, supplemental powering will need to be provided for the off-board units.
Otherwise, any 12 to 16 Volt adapter capable of at least 100mA will do.
If you are using a sensor network of 1-Wire devices, connect them now to either
connector J3 or J5.
Figure 2 Location of Connectors
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1WSwitch User Guide Version 1.02 Page 7 of 28
4. Using 1WSwitch
Connect up a straight-through serial cable between 1WSwitch's J4 connector and
your PC. Open up HyperTerminal (or equivalent terminal emulator program) on
your PC. Configure it to 9600 BPS, No parity, 8 bits, 1 start bit and NO hardware
handshaking (very important!). Power up the 1WSwitch and configure the unit for
the devices that you have connected.
The start-up sequence will look like this:
1WSwitch v1.01 2008-10-12
MidonDesign.com 2245
Reset type: C2
Poll interval = 255 minutes
Serial # Display = On
Time Display = On
OnBoard ADC Display = On
Enable INP = On
Debug = On
SUN 00:00:00
>
We recommend that you next use the ERA command for first time use, to erase
the EEPROM. This will remove any previous information that may have been
stored in the EEPROM. Next use the INI command to register any 1-Wire
devices connected to the 1-Wire bus. If you get any error messages, it is most
likely a result of a bad connection to the devices. Verify them. Typically, a "OW
bus error" message indicates that a sensor has been installed in reverse, or that
there is a short on the bus.
Note: an ERA command is not required every time that an INI command is
issued. It should only be required for first time use.
If you believe that 1WSwitch has not found all 1-Wire devices, re-issue the INI
command.
Now program the configuration by using the SET command. Just type SET and
the program will prompt you for the required settings; polling interval, display
settings, and finally the real time clock setting.
>set
Poll interval = 01
Serial # Display = on
Time Display = off
OnBoard ADC Display = on
midon design
1WSwitch User Guide Version 1.02 Page 8 of 28
Enable INP = off
Debug = off
Set Clock (d,h,m,s): 01,14,30,00
The options are further defined later in this manual. All are independently
adjustable without using the SET command.
To verify that your setup is working properly, you could next use the TMP
command to perform an immediate sensor reading. The output of the TMP
command should look like the sample below (the exact output will depend on
what type of sensors and how many you have installed).
SUN 14:30:44
Reading Sensors...
Switch #01[C90000005F31C412]=On
Switch #02[4A0000005F3A1512]=On
Switch #05[170000002A345005]=On
Switch #06[4F0000002A15C405]=On
Switch #07[A60000002A30A405]=On
Switch #08[620000002A1B9C05]=Off
Switch #09[410000002A1A3A05]=On
Switch #10[CC0000001FBD2605]=Off
Switch #11[8F0000001FB60105]=Off
Switch #12[E60000001FB82D05]=Off
Switch #13[A20000001FB6C705]=Off
Switch #14[290000005F365412]=Off
J2 Pin 3 Voltage = 00.40V
>
It is highly recommended that you next turn off (or on) all the connected switches.
This will reset the saved state in the EEPROM, which may not match the physical
configuration – the state of all switch sensors is normally preserved through a
power cycle. Use the ONA or OFA command for all DS2406’s (or DS2407) and
the TOG command for DS2405’s.
If there are no apparent errors, you are ready to use 1WSwitch. Enjoy!
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1WSwitch User Guide Version 1.02 Page 9 of 28
5. Using 1-Wire Switch Sensors
Figure 3 DS2405 or DS2406 Applications
Figure 3 shows some of the ways in which DS2405 or DS2406 1-Wire sensors
can be connected to external devices. The PIO pin on the 1-Wire device can be
used as either an input or as an output. When used as an input, make sure that
you set the 1-Wire sensor to the off state, otherwise the PIO input changes will
not be visible to the device.
When properly connected as a switch input, 1WSwitch will show state changes
whenever they occur, for example:
FRI 08:11:10
Switch #01[C90000005F31C412]=On
>
FRI 08:11:12
Switch #01[C90000005F31C412]=Off
>
FRI 08:11:17
Switch #01[C90000005F31C412]=On
Note that “On” means that the DS2405/6/7 PIO output is at ground voltage level.
Thus, in the applications shown in Figure 3, “On” would mean that switch SW1 is
closed, or LED DS1 is lit, or relay RLY1 is activated.
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1WSwitch User Guide Version 1.02 Page 10 of 28
6. 1WSwitch Commands
Table 1 1WSwitch Command List
Command Description Syntax
DAD Display on-board ADC voltage during
poll output
DAD<on|off>
Note 3
DEB Enable or disable debug outputs
Use only when directed to by Midon
Design
DEB<on|off>
DEL Delete a sensor that was previously
installed via the INI command
DEL<sensorid>
Note 1
DIS Display serial numbers of all registered
1-Wire devices
DIS
DTI Display Time every minute DTI<on|off>
EEP Display and change specific EEPROM
memory locations
EEP <start location><cr>
EIN Enable polling of 1WIO sensors for
input status
EIN<on|off>
ERA Erase the entire EEPROM ERA
HLP Display a list of available commands HLP
INI Register all connected 1-Wire sensors INI
INP Display the status of bits 4-7 of the first
connected DS2408
INP
LED Actuate a specific LED on a 1WIO LED
unit or an equivalent DS2408 LED
interface
LED <LED number> <on|off>
Where <LED number> = 01 to 80
or A for All (the leading zero is
required for LED numbers less
than 10)
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