1 wire network

[khalidh]

Hello
I have to interface some 40 50 DS18s20 or DS18B20 using 1 wire network with PC and to display them graphically. I have sorted many solutions first using Serial Adaptor HA7E to interface DS18B20 and other solution to use 1-Wire Sensor Logging Device LOG08-II but in this I can only log 24 sensors thats the problem with this. Other solution is to use PIC microcontroller but this options serves several issues like finding the ID of the 1 wire device using search algo and the associated cost of the development toolkit of PIC. Any other possible solution for this I would be really grateful...I am totally confused at this stage anyone please guide me in this regard.
Khalid

 

[pete_c]

I am using the Temp08, Temp05 and a 9097 for my one wire sensor. I've never put 40 temperature sensors though on one device and been slowly migrating my older temperature sensors to combo temperature humidity sensors. I've not heard of any limits on said devices though...

 

[khalidh]

Thanks for your reply. Temp 08 is the same as temp 05 i guess with some additional features but temp 05 can interface upto 20 sensors. LOG08-II can log upto 24 DS18S20, DS18B20, DS2438, or DS1822 temperature sensor. I have surfed through this design but I am not been able to grasp the concept of auxiliary channels and the main channels of master hub that has both adaptor and six port hub
I cant post the links as I am new to this forum....ahh
please guide me in this regard
thanks

 

[nov0798]

Now if we could just get them to work with Premise!

 

[pete_c]

I didn't know about the capacity of the Temp08. What about the 9097?

 

[khalidh]

Actually DS9097u is meant for short networks and for longer and reliable communication HA7E is recommended but I don't how to interconnect it, as it will draw power from the serial port it could complex the network and also unreliable.

 

[pete_c]

The two 9097's I am using have runs from 50-200 feet and appear to work OK for the last 6 years or so. One is just used for a HB dual counter for water meters and the other one is used for combo Temperature and Humdity with extra voltage. The Temp05/08 also have runs which go to a maximum of 200 feet or so and are still reliable.

There is a user/plugin author on the HS forum using both HA7E and LOG08-II for his applications. You can read about it here:

1-Wire

 

[khalidh]

How can I connect two 9097 with one serial port of the PC..? can you please tell me about it and one more question that how can i split the wire as I am thinking to connect 50 sensors in daisy chain topology..do i have to use rj45 splitter if i use cat5 cable..sorry to ask such simple question as I havent done this before..
regards

 

[khalidh]

As I am intended to measure the temperature inside a sealed logistic small container I cant opt to go many wires as I don't want the temperature to go down due to leakage or something.

 

[pete_c]

You can't as far as I know.

You can try using a HB's hub though as posted on the HS forum. You can also utilize one USB port to multiple USB / multiple serial connections via said single USB port. I've had the least amount of issues with pure temperature based 1-wire sensors. Building a 1-wire network for the number of devices you want would be easier with multiple 1-wire devices (kind of hub and spoke like). The two most popular means (documented both in the Windows and Linux world) are using the the HB's hub, Temp08/5, 9097's for a combo setup. I am "mixing" the two 1-wire worlds by using separate and distinct 9097 and Temp0X networks and MCS's autonomous XAP stand alone Temp0x and 1-Wire(9097) applications (multiple instances and multiple ports). IE: my 1-wire XAP application is connected to two SERIAL 9097's and running with two com ports getting data from each one.

Here are the serial communications via two serial 9097's connected to one stand alone application. Recently also been playing with a new device from China called USB-9097. It emulates the serial 9097 device.

Temperature=51.85625 Humidity=89 Voltage= 4.94 3.62 0 19 |
04 07:30:37 | Port=COM13 Address=640000000DC81C1D Family=DS2423 Counter=48810/62 |
04 07:30:38 | Port=COM3 Address=18000801CB238A10 Family=DS1920 Temperature=9.9375 |
04 07:30:51 | Port=COM3 Address=54000000A9173A26 Family=DS2438 Temperature=50.1125 Humidity=100 Voltage= 4.99 0.03 -0.25 -6404 |
04 07:30:53 | Port=COM3 Address=43000801E197F110 Family=DS1920 Temperature=20.5 |
04 07:30:53 | Port=COM13 Address=640000000DC81C1D Family=DS2423 Counter=48810/62 |
04 07:30:54 | Port=COM3 Address=2D0008013977B510 Family=DS1920 Temperature=8.3125 |
04 07:31:01 | Port=COM3 Address=54000000A9173A26 Family=DS2438 Temperature=50 Humidity=100 Voltage= 4.99 0.03 -0.25 -6404 |
04 07:31:06 | Port=COM3 Address=DC000000F1D35C26 Family=DS2438 Temperature=70.7 Humidity=44 Voltage= 4.92 2.14 0 0 |
04 07:31:07 | Port=COM13 Address=640000000DC81C1D Family=DS2423 Counter=48810/62 |
04 07:31:08 | Port=COM3 Address=18000801CB238A10 Family=DS1920 Temperature=9.9375 |
04 07:31:21 | Port=COM3 Address=6B000000E772F326 Family=DS2438 Temperature=51.63125 Humidity=89 Voltage= 4.94 3.61 0 19 |
04 07:31:22 | Port=COM3 Address=43000801E197F110 Family=DS1920 Temperature=20.5 |
04 07:31:23 | Port=COM13 Address=640000000DC81C1D Family=DS2423 Counter=48810/62 |
04 07:31:28 | Port=COM3 Address=18000801CB238A10 Family=DS1920 Temperature=9.9375 |
04 07:31:29 | Port=COM3 Address=2D0008013977B510 Family=DS1920 Temperature=8.3125 |
04 07:31:34 | Port=COM3 Address=54000000A9173A26 Family=DS2438 Temperature=50 Humidity=100 Voltage= 4.99 0.03 -0.25 -6404 |
04 07:31:34 | Port=COM13 Address=640000000DC81C1D Family=DS2423 Counter=48810/62 |
04 07:31:42 | Port=COM3 Address=6B000000E772F326 Family=DS2438 Temperature=51.6875 Humidity=89 Voltage= 4.94 3.6 0 19 |
04 07:31:48 | Port=COM3 Address=2D0008013977B510 Family=DS1920 Temperature=8.375 |

There is one user on the HS forum that I think is utilizing multiple 1-wire sensors / readings in a lab environment. I believe she is using HS as her base for graphing etc her devices. Not sure what the lab environment entails or what she is doing with it. Its been a couple of years since I've seen any posts from her.