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by roby1chenoby
Thu Dec 12, 2013 10:49 am
Forum: Automation, sensing and robotics
Topic: DS18B20 reading 85°C
Replies: 26
Views: 39622

Re: DS18B20 reading 85°C

Many thanks Anita, i'll try as soon i've some time to do a complete cable check and re-wiring using the tip you've mentioned (data and gnd using a twisted pair). Another question: using the Raspberry the only way to read the temperature is to do a "cat" of the w1_slave file? are there any other alte...
by roby1chenoby
Thu Dec 12, 2013 8:36 am
Forum: Italiano
Topic: Problema con DS18B20
Replies: 6
Views: 2815

Re: Problema con DS18B20

Ciao German, il secondo test che ho fatto, con il filo corto, l'ho eseguito proprio con il secondo sensore partendo da zero per escludere qualsiasi danneggiamento al primo (anche se i 5V rientrano tra i suoi parametri operativi)...è questo che non capisco...in teoria è la situazione ideale, poco cav...
by roby1chenoby
Wed Dec 11, 2013 2:22 pm
Forum: Automation, sensing and robotics
Topic: DS18B20 reading 85°C
Replies: 26
Views: 39622

Re: DS18B20 reading 85°C

Thank you for the prompt reply! Inthe firs test my sensor was connected via 3mt long cat5 network cable and the other one (for testing pourposes) now is "working" with 15cm thin cable. In both cases i use a 4k7 resistor but i've read that is not needed in some configurations. I'm not an expert...cou...
by roby1chenoby
Wed Dec 11, 2013 1:35 pm
Forum: Automation, sensing and robotics
Topic: DS18B20 reading 85°C
Replies: 26
Views: 39622

DS18B20 reading 85°C

Hi all, after some time spent configuring and adding some funcionality at my new Raspberry i've decided to create a temperature logger using python, sqlite and the Dallas DS18B20 sensor. Once the database and script were ready i placed an order and bought me 2 sensors and the 4,7Kohm resistors. In t...
by roby1chenoby
Tue Dec 10, 2013 4:04 pm
Forum: Italiano
Topic: Problema con DS18B20
Replies: 6
Views: 2815

Problema con DS18B20

Ciao a tutti, dopo aver installato, testato e configurato la mia Raspberry Model B (http://robertoconi.dyndns.org/stato.php) con forte soddisfazione volevo aggiungere anche la possibilità di rilevare la temperatura esterna e quella di casa mia. Leggendo qua e la ho visto che la miglior soluzione è i...

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