AVR-Chat

Some soil moisture sensors are gypsum blocks that form a simple two  
terminal resistor. There are also 4-arm bridge units and others based  
on capacitance. The latter type which I know (Decagon) interfaces with  
SDI-12 (a 1-wire async serial protocol).

Jim Wagner
Oregon Research Electronics

On Jan 11, 2009, at 8:34 PM, Tim Gilbert wrote:

> Sounds like you're building some sort of greenhouse controller;  
> we've had a customer modify one of our PDK-Is for that purpose (www.pdksolutions.com 
> ) .
> Most of the sensors you want are pretty simple (don't know about  
> soil moisture). Ethernet and USB can be complicated but there are  
> modules that would simplify things.
>
> Regards,
>
> Tim
>
> ----- Original Message -----
> From: rutabagalips
> To: AVR-Chat@yahoogroups.com
> Sent: Sunday, January 11, 2009 5:52 PM
> Subject: Re: [AVR-Chat] Dvelopment Board?
>
> This would be a development board intended to make it easy to work  
> with and develop applications for what product, exactly?
>
> --- On Sun, 1/11/09, dharmendra tiwari  
> <dharam_in_action@yahoo.co.in> wrote:
>
> From: dharmendra tiwari <dharam_in_action@yahoo.co.in>
> Subject: [AVR-Chat] Dvelopment Board?
> To: AVR-Chat@yahoogroups.com
> Date: Sunday, January 11, 2009, 6:58 AM
>
> In search of a development board with four sensors including  
> temperature, humidity, light and soil moisture sensors.
> also controls fan, fogger, variable intensity, light bulb, dripper.
> USB Ethernet Connectivity, 128KB Flash memory, 128KB RAM / 128KB  
> EEPROM memory module, 8-channel Analog input with 10-bit Analog to  
> Digital Converter, Includes ISP connector which allows programming  
> with an optional in -system programmer.
> Help me please.
>
> Bring your gang together. Do your thing. Find your favourite Yahoo!  
> group athttp://in.promos. yahoo.com/ groups/
>
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>
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>
> 



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