AndrewC's Content

#26160 Redacted 00101100

Posted by AndrewC on 30 March 2012 - 06:27 PM in General Discussion

I'm taking 44 to mean April 4th (4/4). My concern is a more cynical definition of redacted could be "removed". Is the page saying "Removed 4/4" , as in the site is going away on April 4th? I hope not and would rather see the mundane "Coming Soon" banner or something similar....

#25894 Any success stories with Cellular, SM5100B or other?

Posted by AndrewC on 23 March 2012 - 12:49 PM in Netduino Plus 2 (and Netduino Plus 1)

If you don't need a shield solution, I've been very successfuly with the Motorola c168i phone connected through the serial TTL port. The phone takes a 2.5mm plug to the UART. In my project (a bilge alarm for a sailboat), I wanted the cellular phone be be located up high in the cabin. I have bildge switch, door switch and voltage sensor conneted to the netduino. I prototyped on a NetduinoPlus, but deploying on a NetduinoMini + ARD TERM - a couple of pin changes and am done. What a nice family of products....

#20929 .NET Gadgeteer availibility

Posted by AndrewC on 24 November 2011 - 01:00 PM in General Discussion

Any update on a Netduino Shield? Or can I use a ‘3rd party’ Shield? I'm almost done prototyping my "Marina Weather Station" and want to move my “bread-board circuits” to a more permanent solution. Also, be happy to use a Netduino prototype Shield and give feedback. Andrew

#20830 Read from UART & Write directly to SD file?

Posted by AndrewC on 21 November 2011 - 05:43 PM in General Discussion

Just an FYI I found out that making the buffer size = 256 for the Linksprite camera will get the camera to take uncorrupted pictures 99% of the time. It's just slow, takes about 25 seconds to save the picture to the SD card. Changing the baud rate didn't materially change the time so I'm thinking it's writing the SD card that is slow. Andrew

#20727 Read from UART & Write directly to SD file?

Posted by AndrewC on 17 November 2011 - 01:51 PM in General Discussion

Thanks for the idea of using DataReceived. I'll take a look at it. I do have other interrupts running, but I can turn them off when taking a picture. Regarding the JPEG file, the LinkSprite camera tells you both, the file size and there is a EOF marker. I'm checking both, and then issueing a warning that it may be an invalid file if I don't get both. I'm still playing around with the baud rate and timing. I'm getting a valid file 75% of the time, but all pictures have streaks in them. I think something goes out of alignment when I get a Read() timeout instead of having bytes to read from the UART. If the DataReceived interrupt only fires when there is data in the buffer, that may solve my problem. I'll try it shortly and let everyone know. Regards Andrew PS I think somehow I have 2 accounts - AndyC and AndrewC are both me!

#20542 Netduino + LinkSprite JPEG Camera

Posted by AndrewC on 13 November 2011 - 05:15 PM in Netduino 2 (and Netduino 1)

Does anyone have this working? I used the code in the links above but I'm having 2 strange issues. 1. The code runs fine if I step-through it, but doesn't work if I just run it. Should I be introducing some sleep() time after writing to the camera? 2. When stepping through the code, the Port.Read() command throws a System.Exception when there are not more bytes read instread of returning 0 bytes read. Any thoughts on why this is happening? Thanks Andrew

Hi Andy,

Did we get this solved for you alright? [in regards to using the Pins. enumeration instead of Cpu.Pin?]

Chris

Hi Chris,
That was the problem. Using Pins. worked perfectly.
thanks
Andrew