[wxsig] Connecting T-238+, X1W-1, X1W-2 and AAG

[John Bennett]

Hi Leon,

Sorry you are having problems. There are a couple of possibilities:

1. If you have what AAG refers to "Version 3.0" and you were originally
using only a two-wire setup (the test jumper included in AAG's kit is
two-wire - or at least it was) connecting it with 4-wire cable will
cause this to happen.

2. The jumpers set wrong on the X1W-1 and/or X1W-2 are set wrong. Again,
it's the AAG "Version 3.0" anemometer problem again. If you were using
4-wire cable and the T238+ worked with that, I suspect the two jumpers
in the kits are set to the other type. Double-check the manual
instructions.

The AAG "Version 3.0" hooked up to a T238/T238+ and/or the X1W kits
jumpered for the original Dallas unit will cause the problem you
describe. Hope this will at least give you a starting point.

In retrospect, I believe now I should not have put the jumpers in the
kits but rather given instructions on how to modify the AAG unit. In
defense of my decision, however, I feel that cutting traces on a brand
new piece of equipment is not a good thing. If you have a warranty
issue, AAG would be in their rights to refuse to honor the warranty.

John
n4xi

On Sun, 2007-07-08 at 07:19 -0400, Leon Bruner wrote:
> I'm in the process of extending my initial weather staton that consisted 
> of a T-238+ and an AAG weather station by adding the X1W-1 and X1W-2 and 
> am having problems getting the system to work when the components are 
> hooked together.  Here's my current situation:
> 
> 1.  My T238+ and AAG WX station work well together:  I've had the 
> station up and running - data have been seen on findu.
> 2.  I have completed assembly of the X1W-1 and it checks out OK using 
> tstfind.
> 3.  I have attached the AAG WX station to thw X1W-1 and the sensors are 
> found when tested using tstfind and other utilities.
> 4.  I have double checked the 1 wire cables I have made to ensure 
> straight through and have good continuity
> 
> When I connect the T238+, X1W-1 and AAG together I either get bus shorts 
> to ground, or the T238+ doesn't start when it is plugged in depending on 
> configuration.  I have looked through the wxsig archives and seen 
> references to the need to cut some traces on the AAG unit in order to 
> make it all work, but haven't found clear direction on which traces to 
> actually cut.
> 
> In trying to figure this out I've looked at the schematics of all 4 
> units and have come up with the following table that describe the 
> connections assigned to the various pins on RJ11 jacks.  I've put 
> together 2 tables shown below that show the pin outs on the 1 wire bus 
> for the four components used in the system.  One table shows the 
> situation where P17 and JMP3 jumpers are placed across P and 2, and the 
> other situation where the jumpers areplaced across P and 1.
> 
> Situation 1 
> 
> Pin Number**
> 
> 	
> 
> Device**
> 
> *6 Pin RJ 11*
> 
> 	
> 
> *4 Pin RJ 11*
> 
> 	
> 
> *T-238+*
> 
> 	
> 
> *X1W-1*
> 
> 	
> 
> *X1W-2*
> 
> 	
> 
> *AAG*
> 
> 1
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 2
> 
> 	
> 
> 1
> 
> 	
> 
> gnd
> 
> 	
> 
> +5V
> 
> 	
> 
> +5V
> 
> 	
> 
> Vcc
> 
> 3
> 
> 	
> 
> 2
> 
> 	
> 
> Bus
> 
> 	
> 
> Bus
> 
> 	
> 
> Bus
> 
> 	
> 
> Bus
> 
> 4
> 
> 	
> 
> 3
> 
> 	
> 
> gnd
> 
> 	
> 
> gnd
> 
> 	
> 
> gnd
> 
> 	
> 
> gnd
> 
> 5
> 
> 	
> 
> 4
> 
> 	
> 
> +5V
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
> gnd
> 
> 6
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> X1W-1 P17 jumper connect pins P and 2
> X1W-2 JMP3 jumper connect pins P and 2
> 
> Situation 2
> 
> Pin Number
> 
> 	
> 
> Device
> 
> *6 Pin RJ 11*
> 
> 	
> 
> *4 Pin RJ 11*
> 
> 	
> 
> *T-238+*
> 
> 	
> 
> *X1W-1*
> 
> 	
> 
> *X1W-2*
> 
> 	
> 
> *AAG*
> 
> 1
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 2
> 
> 	
> 
> 1
> 
> 	
> 
> gnd
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
> Vcc
> 
> 3
> 
> 	
> 
> 2
> 
> 	
> 
> Bus
> 
> 	
> 
> Bus
> 
> 	
> 
> Bus
> 
> 	
> 
> Bus
> 
> 4
> 
> 	
> 
> 3
> 
> 	
> 
> gnd
> 
> 	
> 
> gnd
> 
> 	
> 
> gnd
> 
> 	
> 
> gnd
> 
> 5
> 
> 	
> 
> 4
> 
> 	
> 
> +5V
> 
> 	
> 
> +5V
> 
> 	
> 
> +5V
> 
> 	
> 
> gnd
> 
> 6
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> 	
> 
>  
> 
> X1W-1 P17 jumper connect pins  P and 1
> X1W-2 P JMP3 jumper connect pins P and 1
> 
> It's dangerous for a guy like me to be reading schematics because if 
> there ever was an amateur looking at this stuff, it's me...  So I'd 
> appreciate those of you who really know something about this to please 
> check my work.  I used the schematics on the TAPR website for the T238+ 
> and X1W units, and a schematic found on the AAG website for the pin-outs 
> on the AAG WX station (aag schematic: 
> http://www.aagelectronica.com/aag/en-us/p_1.html) .
> <http://www.aagelectronica.com/aag/en-us/p_1.html>
> 
> Assuming that these tables are correct, then it seems to me the best way 
> for me to connect all four units together is to do the following:
> 
> 1.  Place jumpers on P17 and JMP3 across pins P and 1 as this will make 
> the bus wiring for the T238+ and X1W units the same.
> 2.  Connect the T238 to the X1W-1 using a straight through 4 lead cable.
> 3.  Connect the X1W-2 to the X1W-1 using a straight through 4 lead cable.
> 4.  Connect the AAG WX station to the X1W-2 using a cable that crosses 
> leads 1 and 4 so that +5 V from pin 4 of the X1W-2 will be directed to 
> pin 1 of the AAG wx station.
> 
> Does this make sense?  If not, does anyone have an alternative 
> recommendation? 
> 
> Thanks for the help.
> 
> Regards,
> 
> Leon
> NT8B
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-- 
John Bennett
Evansville, IN
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