Barionet 50 not seeing 1-wire devices - FIXED

Tue Jun 28 07:25:24 EDT 2022

I picked up an eBay Barionet 50 for a bargain last winter - but it didn’t recognize or respond to 1-wire devices, which is 95% of the reason I wanted another one….

Barix forum led me to Barix support which helped me troubleshoot a blown transistor, and I found some on eBay.

I’d never done any surface mount electronics repairs before - and just yesterday finally pulled together an appropriate soldering iron, time and the gumption to give it a shot.

It works!   And I’ve got 98* more Slkor BC817-40 45V0.5A SMD Transistor Power Transistor NPN, because the best source I found offered a 100 pieces for a whopping $2 with free shipping…..which took 2 months to arrive. [not complaining!]

So if anyone wants a couple-three or more, let me know and I’ll mail you some….

*yup, I messed up the first one I almost got soldered in place. Jumpy little buggers, they are.

Share and enjoy!

Vbob

> Begin forwarded message:
> 
> From: Barix Support Ticket <support at barix.com>
> Subject: Re:[## 143317 ##] [barionet forum] Barionet 50 not seeing 1-wire devices
> Date: March 2, 2022 at 4:08:10 AM EST
> To: "Vbob" <vbob at whipplestreet.net>
> Reply-To: support at barix.com
> 
> Hello Bob,
> 
> here is a copy from our BOM about T5 :
> 
> NPN Transistor BC817-25,SOT23,SMT,Philips/Fairchild P/N:BC817-25==BC817-25 SOT23
> Philips or Fairchild P/N:BC817-25 SOT-23 NPN 符合RoHS标准
> 
> Best regards
> Stefan Giessler
> Barix Support Team
> support at barix.com <mailto:support at barix.com>
> 
> ——————————————————————————
> 
> 
> ---- Am  Wed, 2 Mar 2022 01:40:14 +0100 "Vbob"<vbob at whipplestreet.net <mailto:vbob at whipplestreet.net>>  schrieb ---- 
> Thank you very much for the partial schematic - that will help me understand and locate the tiny components - all my experience has been with ‘full size’ resistors, transistors, etc.
> 
> Bingo!  I used my iPhone as a microscope, and I can see physical damage to transistor T5 in the 1-wire circuit.  Now I just need to learn how to solder surface mount devices……
> 
> This should be fun!
> 
> 
> On Mar 1, 2022, at 7:08 PM, Barix Support Ticket <support at barix.com <mailto:support at barix.com>> wrote:
> 
> Hello Bob,
> 
> attached is little snapshot of the 1-wire part from the Barionet50 schematics.
> There you see all what is between the CPU and the connector.
> 
> Sorry, that I do not send the entire schematics.
> It´s only allowed for me to send partially schematics.
> 
> Good luck for the repair!
> 
> Best regards
> Stefan Giessler
> Barix Support Team
> support at barix.com <mailto:support at barix.com>
> 
> ——————————————————————————
> 
> 
> ---- Am  Wed, 2 Mar 2022 00:14:02 +0100 "Vbob"<vbob at whipplestreet.net <mailto:vbob at whipplestreet.net>>  schrieb ---- 
> This particular unit is certainly more than 2 years old! I suspect the part number 2008.8058 is also a date code…..
> 
> I fully understand that repairing something like this is not cost effective. I asked on the forum because there was a chance I had missed some setting, or someone else might have had similar problems.
> 
> This is an intensive home hobby use, so it does make sense for me to see if there’s any chance I can troubleshoot and repair it while I save up for a replacement.
> 
> Is there any availability of even a partial schematic of the the relevant portion of the 1-wire interface?  
> 
> Back in 2010 when I started using the Barionets, I downloaded 'Barionet 50 I/O schematic’ sheet 5/6 from the Barix site, which shows the relays and inputs, but it does not include the 1-wire connection. The schematic(s) don’t seem to be posted in the support section any longer.
> 
> I have extensive electronics repair experience, but the parts keep getting smaller and smaller and my eyes have gotten a lot older…..
> 
> Wish me luck!
> 
> Thanks
> 
> Vbob
> 
> On Mar 1, 2022, at 3:39 PM, Barix Support Ticket <support at barix.com <mailto:support at barix.com>> wrote:
> 
> Hi Bob,
> 
> the low voltage on the J6 connector shows there is some hardware broken.
> 
> Is the device still under warranty (max 2 years old) ?
> If yes, then please contact your distributor.
> Otherwise we don´t offer a hardware repair service for the Barionet50, it makes no sense
> for a product in this price range - repair, spare parts, testing and shipment will be more expensive that a new Barionet50.
> Better to buy a new product.
> 
> Or do you have extended electronic knowledge, then you could even try to repair it.
> But the question is , does that make sense on a product which is perhaps 10 years old ?
> 
> Best regards
> Stefan Giessler 
> Barix AG
> 
> 
> ============ Weitergeleitete Nachricht ============
> Von : "Vbob"<vbob at whipplestreet.net <mailto:vbob at whipplestreet.net>>
> An : <barionet at groups.io <mailto:barionet at groups.io>>
> Datum : Tue, 1 Mar 2022 21:28:13 +0100
> Betreff : [barionet forum] Barionet 50 not seeing 1-wire devices
> ============ Weitergeleitete Nachricht ============
> 
> Stefan - thanks for prompt response!
> 
> I would continue this off-forum but I don’t find your email address other than the forum link.
> 
> I have tried both a 10vDC supply from my old FiOS router, and a well regulated 12vDC supply salvaged from old external SCSI hard drive. 
> Both have successfully powered other Barionet 50 devices just fine.
> 
> Other features of this Barionet 50 seem to work fine - I haven’t tried the serial ports, but the relays and the digital inputs all respond as expected.
> 
> I have NOT had any repair attempted - I was just wondering if such were even feasible.
> Nothing is visually defective outside or inside - I was hoping for a visibly bad solder joint or some such that I would be competent to fix myself….
> 
> I have done factory default settings both via the web interface, and via the paperclip-jumper inside…. Neither made any difference.
> I have tried two different firmware versions - 2.00 and 2.50 - neither made any difference.
> 
> [I have my own archive of old manuals and software/firmware starting from when I got my first Barionet 50 in 2010 - I now have 10 in service, and this is the first time I’ve had any trouble with them.
> 
> I’m seeing about 3.6v on the 1-wire connector of the unhappy Barionet 50, and I get 4.7v on the same pins on another unit that IS working fine - so that’s a great tip.
> I’m hoping to borrow an oscilloscope to see if the 1-wire port doing anything interesting.
> 
> What are my options for hardware repair/support?  This particular unit is p/n 2008.8058
> 
> Thanks
> 
> Vbob
> Bob Vennerbeck
> 
> On Mar 1, 2022, at 2:59 PM, Stefan Giessler via groups.io <http://groups.io/> <stefan=barix.com at groups.io <mailto:stefan=barix.com at groups.io>> wrote:
> 
> Hi, 
> 
> what power supply you have connected ?
> You said you have got it repaired...
> What was defective ?
> You have tried to reset the device to default settings?
> 
> The temp sensor connector pins are not connected directly to the CPU, there are some resistors in between.
> Perhaps is one of those broken ..
> When I measure the voltage on the J6 connector, then I get 4.7V.
> 
> But let´s handle that issue off-forum. That´s a normal support issue.
> 
> Best regards
> stefan
> 
> 
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> 
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> 
> 
> 
> 
> <B50_1wire.jpg>
> 
> 
> 

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