Re: DS18B20 with eLua + Mizar32

Posted by hrh1818 on
URL: http://elua-development.15.s1.nabble.com/DS18B20-with-eLua-Mizar32-tp7578012p7578018.html

On 5/21/2013 1:05 PM, Gabriel Duarte wrote:

Hi!

The question is just how to send and get data, , what interface I have to use to send and receive data from the sensor. The rest, like decoding data, CRC, I'll implement myself.

Cheers

Most people use a GPIO pin to connect to a One Wire device.
An alternate approach is to use a RS232 interface as shown in the following link to connect to One Wire devices.
<http://www.instructables.com/id/1-wire-communication-interface/>

Here is a One Wire overview.
<http://www.maximintegrated.com/app-notes/index.mvp/id/1796>
I strongly recommend you read the first two paragraphs.

Howard

2013/5/21 Bogdan Marinescu <[hidden email]>

Hi,

On Tue, May 21, 2013 at 8:52 PM, Gabriel Duarte <[hidden email]> wrote:

Hello,

I recently bought a DS18B20 temperature sensor, but I got no idea how to connect it to Mizar32 and grab data from eLua. This is the datasheet:

http://datasheets.maximintegrated.com/en/ds/DS18B20.pdf

Which interface I have to use, UART, some PWM pin??

Any help is appreciated ;)

Neither, you'd have to use 1-Wire (https://en.wikipedia.org/wiki/1-Wire). We don't have support in eLua  for that yet, although it should be relatively easy to implement.

Best,
Bogdan

Cheers

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Gabriel Duarte

Linux User #471185
Rio de Janeiro / RJ
http://genericdev.wordpress.com/

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Gabriel Duarte

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http://genericdev.wordpress.com/

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