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Deutsch / Re: FTDI Adapter für 3.3V
Last post by Theseus - Today at 03:08 pm
Bei den meisten Adaptern fehlt ein kräftiger Spannungsregler auf 3,3V. Die 3,3V erzeugt der FTDI-Chip. Der kann aber nur 50mA bereitstellen. Das reicht für einen ProMini, aber ein ESP braucht deutlich mehr Strom. Das kann natürlich auch gut gehen, solange der ESP nicht groß sendet.
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What provider were you using?
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Why are you so scared? Just re-enable the interrupt after arriving at the ISR.
¿Really? and jump again on another interrupt if the Serial message isn't completed?

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Some hall-sensors have a digital output.. (check datasheet for your sensor)
If digital;  connect to an interruput pin  (pin 2 or 3 on an UNO)
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Project Guidance / Re: neopixel stick
Last post by UKHeliBob - Today at 03:04 pm
Code: [Select]
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

There is a parameter in the constructor for the Neopixel object that requires you to define the pin being used and, of course, the secondobject must have a different name too.
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Displays / Re: 3.5" TFT display problem
Last post by ZinggJM - Today at 03:02 pm
Yes, RD is directly connected to 3.3V. I would need to cut a trace and solder next to the cut.
Therefore I postpone this experiment, maybe forever, as this TFT is usable as it is.
I search for the best controller to use on the software side.

I will measure bus signal timing of my GxIO_MEGA_P16_MEGASHIELD and try to get the same with MCUFRIEND_kbv, to try with more controller IDs.


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i can understand the voltage drop through the strip, if the strip was longer than 5m or  something ... but its just 2m strip 125 pixels  i cant understand why this is happening
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Programming Questions / Re: Need some insight
Last post by PaulS - Today at 03:02 pm
Quote
I already posted the link to display library I am using, but here it is again.
That is NOT the link to the library, but there is a link there to the library.

Interestingly, on the library page, there are comments "works with ESP8266", but nothing about working with the ESP32. Makes me wonder why you think that it will.

Code: [Select]
void      begin(bool avoidSPIinit=false);
So, the argument to begin() controls whether SPI initialization is avoided, or not.

We've already concluded that the call to the begin() method is required, so omitting it, resulting an a crash is expected behavior, so we don't have to go there again.

You need to summarize, as we are a long way from where we started. What value passed to begin causes what problems? You said my summary was wrong, so correct it.

Then, think about what doing, or not doing SPI initialization means. What pins, on the ESP32 are you using for the display? What pins are the SPI pins? What other pins are you using, for the GPS and any other stuff?

I'm suspecting a pin conflict.
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Project Guidance / Re: Arduino For car hazards an...
Last post by UKHeliBob - Today at 03:01 pm
Will be interesting to see how the cancel arrangement is going to work. Also I think you will find a modification such as this will come under the scrutiny of a machinery inspection and possibly a need for certification.
I drove a car for years that did not have an auto cancel mechanism on the indicator stalk even from new.  What it did do though was to prevent both left and right indicators to be operated at the same time as they were controlled from a single left/off/right stalk.  This is probably more important than the self cancellation.

I did once own a car with semaphore arm turn signals and a previous owner had replaced the original switch with 2 separate ones so it was possible to operate both at once.  Mind you, as neither worked reliably it made little difference if both were operated at the same time.
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