Raspberry Pi Ethernet to LinkUSB
Ethernet from LinkUSB to MS-TV
Ethernet from MS-TV to DS18B20
Ethernet connections to DS18B20:
DS18B20 +5V red connected to RJ45 pin 2
DS18B20 ground blue to RJ45 pin 6
DS18B20 data yellow to RJ45 pin 4
Thanks,
Peter
On Tue, Mar 1, 2016 at 1:27 PM, Johan Ström <jo...@stromnet.se> wrote:
>
> On 01/03/16 22:21, Peter Hollenbeck wrote:
>
> Question regarding the workings of this forum:
> Does everyone see your email and does everyone see this reply?
> I hope so, so that all information on the subject shared.
>
> Correct, every mail sent to this address is sent to every member of the
> list, and is archived at
> https://sourceforge.net/p/owfs/mailman/owfs-developers/
>
> Anyway, I followed the suggestion of one person to connect a 1K resistor
> to 3.3 V and Data. The DS18B20 is not seen but the MS-TV is. I then removed
> the resistor and the MS-TV disappeared. By this I mean that in the OWFS
> 1wire directory the entry 26.AA5245010000 went away.
>
> I do not understand this stuff well. But I do have working, on another
> Raspberry Pi, OWFS 1wire humidity, solar, and temperature.
>
> Let's back it up. How is everything connected? You have the Raspberry Pi,
> and you mentioned the LinkUSB. And your 1-wire devices. Where are cables
> from the 1w devices go? Directly to the Pi, or to the LinkUSB which is
> connected via USB to the Pi?
>
>
>
> Thanks for giving an old man some help.
> Peter
>
> On Tue, Mar 1, 2016 at 12:45 PM, Johan Ström <jo...@stromnet.se> wrote:
>
>> In your initial post you wrote "I have a Raspberry Pi with LinkUSB and a
>> MS-TV reading DC voltage."
>>
>> If you have a LinkUSB, you don't connect your 1-Wire devices to a GPIO
>> pin, right? The LinkUSB should not require any pullup at all.
>>
>>
>> On 01/03/16 21:16, Peter Hollenbeck wrote:
>>
>> It did not work without the resistor.
>> I thought to look at Adafruit product information:
>> https://www.adafruit.com/products/381
>> "We toss in a 4.7k resistor, which is required as a pullup from the DATA
>> to VCC line when using the sensor."
>>
>> Yesterday evening it worked with the 5K resistor. (Actually 5 1K in
>> series.)
>> This morning I tried with 4K. It didn't work.
>> With or without the resistor, soon as I connect the DS18B20 the MS-TV
>> device disappears and the DS18B20 is not seen.
>>
>> I don't know electronics but does this sound like too much resistance is
>> being introduced by the long cable?
>>
>> Thanks for your reply.
>> Peter
>>
>> On Tue, Mar 1, 2016 at 11:22 AM, Matthias Urlichs < <matth...@urlichs.de>
>> matth...@urlichs.de> wrote:
>>
>>> On 01.03.2016 19:48, Peter Hollenbeck wrote:
>>> > When trying to get it working I read that the DS18B20 needs a 4.7K
>>> > resistor connecting +5V to Data.
>>>
>>> Where did you read that? Did you try without the resistor?
>>>
>>> -- Matthias Urlichs
>>>
>>>
>>>
>>>
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>
>
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