I just bought some cheap pcb boards with usb to ttl converter and nice buttons. After soldering esp chip and testing board I noticed I have to hold the key button and all was fine. I have another firebeetle board and it doesn't need that. What is the rule or reason for that? Does it depent on the on...

Just curiosity - how high frequency can be set with MCPWM ?

I was experimenting with RMT and did a small trick to generate very high frequency square wave Here is a code snippet: #define RMT_TX_CHANNEL (rmt_channel_t)1 /* RMT channel for transmitter */ #define RMT_TX_GPIO_NUM PIN_PWM /* GPIO number for transmitter signal */ #define RMT_TX_CARRIER_DISABLE 0 /...

So it is still a mistery how to intercept simple printf() calls from esp32 by f.ex. Windows app listening to a serial port...
Anyone has ideas?

fly135 wrote: This is something I've found confusing. From what I can tell "pin #s" are the GPIO number, not the physical pin on the chip.

Maybe someone will correct me if I'm wrong.

John A

I think it is the case on Arduino Atmel boards.
On Esp and Stm I found pin numbers to be same as their names so far

I cannot get it working. Tried all 3 uarts 0-2 with UART_PIN_NO_CHANGE
Also noticed according to pinout of devkit board uart0 txd is 41 but undefined
I will try wifi then

Thanks so much. I will try it and let know if it worked

yes however uart api needs a pin number but I have no idea what pin number that is.
Or maynbe there is other way

Well my question is - how I use uart on ESP to send data to PC serial port? uart needs a pin number but serial communication is controlled by that converter chip. So how data from 'printf' is sent to PC ?? It is all sent via usb cable as serial but how? Should I just use printf() ? or UART hardware ...

Is there example of usb sockets on esp?
That built in chip is able to flash the board so it has to be somehow connected and maybe I could access it
What do you suggest?