Wrong number of clock cycles during low ST

[rbcarlos]

Hello,
I found out that in your code there is an incorrect number of clock cycles during low ST.
There should be 87 cycles before the sensor starts outputting data, but in your code, it is only 86 (85 in loop + 1 outside).

[mmp97]

Hei!
Thats exactly what I've found. I was wondering where does this number of cycles come from. Thanks for pointing this out. Btw. as oof 2022, the issue still has not been resolved.

[cheno85]

Hi, I noticed that the code has 87, it might have been edited recently... the code worked for me as is

[jdesbonnet]

I agree that this doesn't look right. Looking at the spectrometer output with "i < 85" in the loop the first 2 'pixels' read are discontinuous with the rest of the spectrum. Ie 137, 135, 383, 373, 360 ... (full spectrum below).

I wonder should it actually be "i < 87" in the loop because it looks like there are two dark pixels at the start.

This wouldn't be noticed if you were doing your own calibration. But if you're using the calibration sheets provided on the GroupGets website then you'd be off by two pixels which would be an error of +3.4nm

137,134,383,373,360,347,341,330,323,316,303,299,293,283,277,274,269,262,254,252,250,241,246,238,242,247,230,231,236,222,229,224,227,226,222,224,224,221,219,218,220,227,218,213,215,220,212,215,210,213,214,218,215,207,212,211,209,210,210,210,207,203,208,206,207,211,206,208,211,211,210,208,211,212,211,213,216,213,215,215,216,220,213,213,217,215,214,218,216,218,218,216,222,219,220,223,222,218,218,221,224,220,217,223,220,219,216,217,216,219,221,220,218,217,216,214,215,216,218,218,217,220,219,219,222,215,216,222,219,220,220,218,219,219,222,220,221,223,221,221,217,219,222,223,219,224,222,225,227,231,231,239,237,235,231,236,240,240,241,247,246,250,250,252,275,263,266,269,271,281,280,285,291,289,296,301,304,308,315,315,328,335,336,340,349,359,365,369,382,390,400,402,407,415,421,434,442,447,461,465,478,494,497,495,513,521,530,528,532,546,544,546,546,546,557,557,561,565,565,572,580,578,592,573,583,591,587,590,595,591,594,588,591,596,596,592,598,593,609,600,599,604,599,600,606,606,604,604,603,608,596,606,599,588,598,598,592,589,587,587,587,588,587,587,581,584,578,581,587,576,580,578,572,580,576,576,573,566,571,568,560,564,560,559,557,553,551,549,