Arduino compile

[paultanner]

I'm trying to test the same code in a normal Arduino build using the IDE (mainly 1.05).
Specifically, I'm building for Uno or Blend Micro. Same thing happens in both cases.
I have the .cpp and .h files inside a folder within the libraries folder.
I have successfully built other sketches that use SPI but in those cases SPI is called from the .ino file rather than from within a library.

I made the change in the .h file

//#include "application.h"
#include "Arduino.h"

SPI not defined so added in .cpp file, the .h file and .ino file (renamed from .cpp file in /examples)

#include "SPI.h"

Still getting errors like:

no matching function for call to 'SPIClass::begin(uint8_t&)'

Evidently the IDE is converting to this from "SPI.begin(_CS);" and then failing to find "SPIClass"

A little too much magic buried in IDE? I'm trying to find out why this is happening but posting here in case I'm missing something that would be needed in a case like this. Online I see various instances of this error with other libraries but no useful solutions.

Any help appreciated ;-)

[dhhagan]

Hmm. I haven't seen errors with the SPI part of it, though there are some other errors associated with string processing since I am using the Particle-specific functions in this library (should be easy to change). I do have an Arduino-specific library that will be released as soon as I get back to the US and can test it.

[paultanner]

Thx for the quick reply David.
I look forward to testing the Arduino version.

[dhhagan]

Hi @paultanner Just got back from India and I will try and have this out ASAP.

[lshindler]

Hi @dhhagan I would like to get the opc-n2 and interface it with arduino. Will you release a library for it?
Thank you very much, bye

[dhhagan]

Hey @lshindler . I do plan on releasing a seperate Arduino library, but am currently out of town and busy with another project. Which Arduino are you planning to use it with? Just curious.

[lshindler]

@dhhagan, I am using arduino mega for a self-financed low-cost air quality project... I am using also other alphasense gas sensor. I cannot find any library on the net to interface the opc-n2 with arduino... I only found your good intentions :)
What is your on-going project?

[dhhagan]

@lshindler Awesome. Are you familiar with logi-level converters? You will need one to switch the 5V logic on the Arduino to 3v3 logic on the OPC-N2. This is one of the main reasons i haven't got around to releasing the library yet...haven't decided on the best way to deal with that!

I build networks of low-cost sensors as part of my PhD as well as working on improving the technologies/algorithms.

[lshindler]

@dhhagan great project! Never used logic level converter...
Good luck for your project!

[rtlidster]

@dhhagan, Awesome work a very helpful guide to get the grey matter working about what's possible. i'm, interested as to see if there has been any progress with the arduino lib. Like @lshindler i'm looking into using arduino and low cost sensors to monitor air quality. i have set up a few other logging systems using some electrochemical sensors and PID's (some also alphasense) using various Arduino unos and Mega boards. One board i found particularly useful is the ethermega that has a lot of functionality bolted on already for SD logging or uploading to the web. this is the first time I've dabbled with aerosols!

[dhhagan]

Hey @rtlidster . I don't really have the time to do it myself right now, but it should just be a matter of switching all of the particle specific classes (String, etc.) to base c++ (char, etc). Hopefully someone out there can take the time to do it, test it, and then send a PR.

[rtlidster]

Hi @dhhagan, ok cool I might give it a go, I used to do quite a lot of c++ (Arduino/daq factory/ instrument control etc) although I don't get much time/ nowadays and I'm constantly having to relearn everything! I'll keep you posted if I get anywhere. Good luck with the PhD, sounds like a cool project! I used to postdoc at the University of York (UK) and we did quite a bit with low cost sensors (testing the long term performance and sensor to sensor variation) it might be worth checking the York atmospheric chemistry research group out if you are interested, I know a lot of work is going on there in this area and it seems to be gaining in popularity. I'm sure a few people there would be interested to hear about some of the work you are doing (if they haven't already!) :-)

[lshindler]

@rtlidster Do you still work in York atmospheric chemistry research group? What type of sensors and logging system have you used? Do you write some articles?

[rtlidster]

@lshindler unfortunately not, i left about two years ago (but still try to keep in touch), most of the work i was involved in regarding sensors was some early inter-comparison studies using electrochemical trace gas sensors (O3, NO, NO2, SO2) and PIDs for VOC sensing. Some of the sensors were from alphasense and there were a few from other sources. As we were doing inter comparisons with the high end lab equipment or using them to support data on field work a lot of the logging was either done using Arduino (uno, mega mainly) or labjacks and then logging, calibrating and optimising using lab-view or daqfactory . we use lab view and daqfactory for logging and control of a lot of the lab instrumentation so it was very easy to just connect up some of the sensors and have them all logging in the same software (often into the same logger). We were also investigating Arduino's for logging (SD card shields etc) and wireless networks (Xbee's etc). When i left there were a few post-docs that had fellowships in this area so i would assume things have progressed quite a lot. The person to get in touch with is probably Dr Pete Edwards. There are a few publications here and here but it might just be worth getting in touch if you are interested (the group is awesome and are doing new stuff all the time). Hope that helps!

[semajoel]

@dhhagan how far with the Arduino library?

[dhhagan]

Hi @semajoel I haven't had any free time to look at it recently...maybe after the semester ends next week I can spend a bit of time trying to get it up.