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Mon 2020.01.20
"Some of our readers reported that they could only upload code when
the ESP32 was powered with 5V. However, we were always successful
providing 3.3V supply."@7oo1er would you please look back through the browser history and post the link to the quote in post #3 please. Google did not return any suitable links using all or part of those exact words.
I believe this quote is taken out of context.
How can it be possible that driving a CPU chip with a higher (and not rated for, possibly damaging the chip, by the way) voltage be okay, but also be successful at a lower voltage?
Running off a TTL converter perhaps?'ESP is more heavy, feed it more, use better and shorter cables'
I'm not entirely sure what the above is intending to imply.
The reason the Pico works from a 1 meter USB cable is that it's own circuit board contains an onboard regulator to convert the USB 5v output to the 3v3 volts needed by the STM32 CPU chip.
"On-board 3.3v 250mA voltage regulator, accepts voltages from 3.5v to 16v"
While there are many flavors of ESP32 and circuit breakout board mounts,"2.2V to 3.6V operating voltage"
what is intended by "better", "shorter" cables for "heavy" use? The power demands for these CPU chips are in the mA range. The restriction of a shorter cable is ridiculous at a meter length. (yes physical properties, diameter, length, wire resistance, etc. need to be considered with many tens of feet however)
If the intent is not to drive additional boards or Neopixel strips from their on board regulator, (which any prudent project would not be doing anyway) then I would totally agree.
Please explain the "But not here." reference to the ESP32. Thank you.
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Robin
@7oo1er
I had some issues, found the cure and need to post it here, for future use. Had strange reboots, googled for hours and finaly found this:
I can use Espruino Pico with a 1 meter cable, add nokia display and temperature sensor. But not here. ESP is more heavy, feed it more, use better and shorter cables.