Veryfing code using this library in Particle Build fails with this error:

opcn2-library/opcn2-library.h:161:9: error: only constructors take member initializers
         bool write_config_variables(byte values[])

The update by the aphasense firm of its OPC-N2 sensor to N3 causes that the library can no longer be used in new projects have any update available for the new sensor ... the user marlon360 (https://github.com/marlon360/opcn3-arduino) recently published a library in this regard but lacks documentation for use or examples

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 ;-)

I noticed that the version is not reported when the device sends back this string

OPC-N2 FirmwareVer=OPC-017b...............................BD

You mention this in the code but not in the READ.ME; I patched it to address this. I'll do it properly when the project is further along.

BTW. Thx for doing this. Your code is a lot more readable than the device documentation ;-)

Veryfing code using this library in Particle Build fails with this error:

opcn2/opcn2.cpp:140:3: error: 'status' was not declared in this scope
   status data

Veryfing code using this library in Particle Build fails with this error:

opcn2-library/opcn2-library.h:146:11: error: candidates are: Opcn2Library::OPCN2::OPCN2(Opcn2Library::OPCN2

Veryfing code using this library in Particle Build fails with this error:

opcn2-library/opcn2-library.h:173:5: error: expected '

Veryfing code using this library in Particle Build fails with this error:

opcn2-library/opcn2-library.cpp:3:1: error: prototype for 'Opcn2Library::OPCN2::OPCN2(uint8_t)' does not match any in class 'Opcn2Library::OPCN2'
 Opcn2Library::OPCN2::OPCN2(uint8_t chip_select){
 ^

We are now looking to build the same OPC (or later version) into a device that has a lot more I/O. This will be based on nRF52832. We are planning to port this library accordingly, basing the build on the open toolchain for armgcc as used in the Nordic SDK. I'm leaving this issue just in case anyone has a similar requirement.

By looking at power draw when the device is off versus disconnected, we can infer the laser is never actually turned off despite the Alphasense docs saying it should be. I will contact Alphasense to see if they can confirm.