Re: ESP-12F | Arduino IDE | Sometimes works sometimes not
Posted: Thu Jan 25, 2018 7:03 am
When it is in bootloader/flashing mode. it doesn't require as high a current compared to when it uses the transmitter. One of the things it does when it executes a program is to calibrate the RF section and it can draw a lot of current for that process. And if you get too much of a voltage dip the cpu crashes. You never get a chance to get to your code. So it looks to you like the flashing process didn't work but really it is that it dies when it tries to run.
This is not an easy processor to work with. It is claimed to be low power, and on average it can be. But it can draw in excess of 1/2 an amp for brief periods. So the power supply must be able to handle that.
This is not an easy processor to work with. It is claimed to be low power, and on average it can be. But it can draw in excess of 1/2 an amp for brief periods. So the power supply must be able to handle that.