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On my Mac I can compile and upload both under Arduino 1.6.5 and 1.8.5, so I definitely have an issue on my Windows laptop.

I have a specific issue with my BH1750 sketch, I'll post the details in that topic:

viewtopic.php?f=3427&t=25521

Any sketch seems to end in the same error: ERROR [2017-10-02 09:34:20,589] [Errno 22] invalid mode ('w') or filename: '\\C:\\Users\\peter\\AppData\\Local\\Temp\\arduino_build_582937Custom.ast' I guess a \\ is missing between "arduino_build_582937" (the build directory) and "Custom.ast" For instance,...

@coco82 I recognize that type of display, I "bitbang" it on my arduino :-) Regarding injecting current into the pin of a microprocessor, if it is high enough the chip might latch-up and get destroyed. I have a certain Microchip mcu, and if you inject 1 mA on a digital pin then the ADC gets less accu...

I agree... I have been delving in the source code of the Wire, ZUNO_OneWire and ZUNO_OLED_I2C libraries and lst files and it has not become any clearer to me. :? I'll try again later. Maybe it is a stack issue like you said and in that case it might be worth waiting for firmware 2.1.1 because that w...

New observation: if you convert to int, the sketch does not crash. But I only let it run for one minute, the test time is a bit short oled.print(int(counter)); conversion to long and doing math does not crash it within one minute either: oled.print(long(counter*1000)); But printing a float with 0 pr...

Thanks, your information is helpful. Together we will solve this mistery! ;-) I think I have made some progress. I reduced the code and now it crashes randomly in less than 1 minute. Tell me what you think... // OLED test by petergebruers, based on DS18B20 sketch // by Michael Schmidt #include <ZUNO...

I am running this sketch right now, I want to share it so you do not have to run the same test as me. I do not see any flickering. I wonder if it makes a difference if you put zunoSendReport after the oled update... My minimalistic sketch does not have zunoSendReport right now, I'll add it if this t...

I fully agree with what you are saying. I noticed the faint flickering of the green LED too. I will try to write a minimal sketch that only writes to the oled.

I noticed my Z-Uno crashed, so increasing the loop speed and oled printing has the same effect as your sketch... Keep digging!

I have some good news... or should I say "bad news"! The green LED stopped blinking! I have now made one change and I have to admit that this is a long shot. But personally I think it makes the display a bit nicer too. Instead of: oled.print(temperature); I now do: oled.print(temperature, 1); For de...

Thank you! If you think the sketch is good enough to be mentioned on the Z-Uno site, that is OK. I am flattered!