ooacquire 0.2.3

Main changes since version 0.2.2 are:

  • Implement support for on-the-fly retrieval of instrument descriptor and calibration data from EEPROM when calibration is not available as R objects: update acq_irrad_interactive() and the functions it uses to retrieve and save calibration data.  (Similar updates are pending for the other data acquisition functions).
  • Update calibration data for MAYP11278 and MAYP112785.
  • Test with old USB2000 spectrometer.

Full change history is available at: https://docs.r4photobiology.info/ooacquire/news/index.html

NOTE: This package is NOT available through CRAN.

This package is available through the r4photobiology repository  and through GitHub.

INSTALLATION:

Note: this version needs the recently released ‘rOmniDriver’ version 0.1.14 or later, so if this package is already installed it may need to be updated before updating or installing ‘ooacquire’ 0.2.3.

  1. From the binary or source packages of the released version from the CRAN-compatible repository at http://r.r4photobiology.info/.
  2. From sources of the under development version retrieved from the Git repository at GitHub.

devtools::install_github("aphalo/romnidriver")
devtools::install_github("aphalo/ooacquire")

Please raise issues concerning bugs or enhancements to this package through GitHub at https://github.com/aphalo/ooacquire/issues

 

rOmniDriver 0.1.14

This update includes several rather minor changes compared to ‘rOmniDriver’ 0.1.13:

  • Add set_USB_timeout() and is_USB_timeout().
  • Edit set_timeout() and is_timeout() as ‘OmniDriver’ does not always/any longer provide the Java methods setTimeout and isTimeout.
  • Add function is_api_enabled().
  • Add check for success of API initialization to function init_api().
  • Add preliminary (untested) support for I2C and SPI bus.
  • Move repository from BitBucket to GitHub.
  • Test with USB2000 (under Windows 10, FX/2 firmware updated to 2.51.0).
  • Test good with OmniDriver 2.56.
  • Update README to better explain all the steps needed to install this package as well as OmniDriver.
  • Update documentation to reflect that the company Ocean Optics has been renamed Ocean Insight.

‘rOmniDriver’ 0.1.13 included minor changes compared to ‘rOmniDriver’ 0.1.12:

  • Add brief installation instructions to README.
  • Fix bug affecting OS X and Linux.
  • Improve on-load diagnosis and messages.
  • Test good with OmniDriver 2.46.

The latest version source is kept in a Git repository at GitHub: https://github.com/aphalo/romnidriver/

The latest released version is available at the CRAN-like repository at https://r.r4photobiology.info/ and a documentation web site is available at https://docs.r4photobiology.info/rOmniDriver/

Please, report bugs and suggest enhancements at https://github.com/aphalo/romnidriver/issues

Pull requests and reports of tests with various models of spectrometers from Ocean Insight are very welcome.

ooacquire 0.2.2

During the last two years development has continued at a slow pace. Most changes are to the functions for interactive acquisition of spectra, correction of bugs and tracking to changes in packages from which imports are made. Testing was done with new OmniDriver releases. Some data examples have been added and also replaced. Some progress with the vignettes has been done. However, the documentation still needs work.

One visible change is the move of the Git repository from Bitbucket to GitHub. Package ‘rOmniDriver’ has also been moved to GitHub and its documentation updated to reflect this.

Starting from this release, the changelog is included in the online documentation at http://docs.r4photobiology.info/ooacquire/.

Please raise issues concerning bugs or enhancements to this package through GitHub at https://github.com/aphalo/ooacquire/issues

NOTE: This package is NOT available through CRAN.

This package is available through the r4photobiology repository  and through GitHub.

INSTALLATION:

  1. From the binary or source packages of the released version from the CRAN-compatible repository at http://r.r4photobiology.info/.
  2. From sources of the under development version retrieved from the Git repository at GitHub.

devtools::install_github("aphalo/romnidriver")
devtools::install_github("aphalo/ooacquire")

Yoctopuce modules: Spectrometer

In the introduction to this series of post, I described the Yoctopuce library and told that R package ‘reticulate’ can be used to access the Python version of the yoctopuce library. Here I describe a simple and cheap “micro” spectrometer with a digital interface and its use together with R packages from the 'r4photobiology' suite.

I will use a miniature and low cost spectrometer, type AS7265X from ams. It does not used a grating as monochromator, but instead each of the 18 channels has a different interference filter deposited directly on the silicon chip. The FWHM is 20 nm, and the wavelength range from 410 nm to 940 nm. The spectrometer consists in three separate sensor units working together. The interface is digital, and temperature compensation and analogue to digital conversion takes place in the sensor modules. In spite of the number of channels communication between the spectrometer and a micro-processor requires only two wires. The spectrometer supports two different communication protocols, the specialized I2C and a generic serial communication (UART).

Continue reading“Yoctopuce modules: Spectrometer”

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