3 replies to this topic

[ninoq]

I have replied to a post in another forum at this site.  I now think that perhaps it would have been more appropriate to have posted in this forum. I'm trying to use a Netuino Mini to read a DS18B20 temperature probe. The Mini has NETMF 4.2 and I'm using code posted at: http://forums.netdui...-ds18b20-on-42/ The reply mentioned above can also be found there. When I try running the code it fails with the following exception report at the first OneWire method encountered:

 

A first chance exception of type 'System.NotSupportedException' occurred in MyApp.exe

Any advice/guidance would be much appreciated

 

[NooM]

NotSupportedException !!

 

onewire is not included in the mini firmware

 

there is a custom one around somewhere i think, search the forums/google for it, like netduino mini onewire

[ninoq]

The most relevant thread I could find was: http://forums.netdui...-onewire-alpha/ In reply #145 (21 Feb 2013 pg. 8) CW2 states:

OneWire implementation for .NET MF 4.2 with the necessary modifications and fixes to make it work on Netduino/Mini/Plus (Gen. 1 boards) is now being evaluated and possibly integrated into the official firmware by Secret Labs.

It now seems a decision was made not to include OneWire support in NETMF 4.2 for the Netduino Mini.  

 

Apart from native code, I'm not clear on what options there are for using a Mini to read OneWire devices.

[NooM]

hm i just checked, and its not for the mini

 

i meant this:

http://forums.netdui...-onewire-alpha/

 

if you just need temperature and it wount get wet (like not underwater or in rain)

a simple analog sensor will do the trick.

they are quite accurate.

 

iam using this one: http://at.mouser.com...x?R=MCP9700A-E/