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virt2real.ru • Просмотр темы - 1wire
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1wire

СообщениеДобавлено: 20 фев 2014, 09:18
pek
Здравствуйте, а возможно задействовать несколько датчиков температуры ds18b20 по шине 1wire у виртурилки, чтобы не занимать пины?

Re: 1wire

СообщениеДобавлено: 20 фев 2014, 09:40
realizator

Re: 1wire

СообщениеДобавлено: 20 фев 2014, 09:54
Mirmik
Если вопрос был о принципиальной возможности подключения к шине одинаковых микросхем, то на шине опознание микросхемы происходит по уникальному номеру. Шанс того, что оба ваших датчика имеют один номер нулевой (если, конечно, китайцы не постарались). Так что датчики конфликтовать не будут. Вирта их будет видеть просто как два разных 1wire устройства.

Шина 1wire как раз и рассчитана на такое применение.


P.S. Более того, подключить шину 1wire на два разных пина... Это может быть проблемой. Не думаю, что это заложено в систему.

Re: 1wire

СообщениеДобавлено: 02 мар 2014, 17:30
Gol

Re: 1wire

СообщениеДобавлено: 06 мар 2014, 23:38
pek
Всем спасибо, все работает 4 датчика на одной шине
Изображение

Re: 1wire

СообщениеДобавлено: 10 мар 2014, 05:32
Gol

Re: 1wire

СообщениеДобавлено: 28 окт 2015, 16:26
Alyoha
Подключил 3-и датчика ds18b20 - работает нормально.
Включаю видео трансляцию с виртурилки и 1wire перестает работать, вернее работает с большой задержкой и значения температуры в файлах данных по CRC не верное.
Может кто подскажет в чем дело?

Re: 1wire

СообщениеДобавлено: 05 мар 2018, 15:10
COBECTb
в последней прошивке в uEnv.txt написано 1wire=10 1wirepullup=11 это соответствует подключению в Wiki http://wiki.virt2real.ru/w/1-Wire?

ЗЫ. Оказалось что нет. :)

Re: 1wire

СообщениеДобавлено: 05 мар 2018, 21:06
COBECTb
чет так и не заработало. Нет ли ключа какого в uEnv.txt типа 1wire=on?
датчики рабочие, подключил к ардуине - работают.