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.
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.
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).