I believe that the internal pull-ups *can* be activated by code but I don't think by default are they activated.

In your case it sounded like high was what caused the sound generator because:!===> without a signal from the processor they "float" and to the sound driver they appear high. So, the ...

Take a look at this: https://www.arduino.cc/en/Tutorial/DigitalPins

Yes, it applies beyond Arduino.

Tom Meyers



Ohh I see... thanks you for answer... I only worked with microchip... so I need pullups mmmm
the ESP32 has internal pullup? the same problem I have with the UARTs, I have one module ...

Hi, this is my first time for work with SoC and freeRTOS.
I need set 3 IO to 0 Level just in void app(), why the micro take many time for put this IO to 0 once time turn on.

Take 2 to 3 sec for runing the software, this is bad cause I have conect one buzz to IO output, and to start is in level 1 ...

Hi, I need know how i do run the Interruption UART1 and 2

I did this and the uart1 working very good, my question is how i do for run the uart2
http://zerothelement21.blogspot.com/2018/05/esp32-uart-interrupt-handling.html


static intr_handle_t handle_console; // UART0
static intr_handle_t UART1 ...

Hi, I have this:

void uart1_task(void *pvParameters){
char character;
char tem;
//struct cmdBuf cmdBuffer;
keyboard_command_t keyboardCmd;

//Install UART driver, and get the queue.
esp_err_t ret = ESP_OK;
const uart_config_t uart_config = {
.baud_rate = 9600,
.data_bits = UART_DATA_8 ...

I see... I can not use that pins... so the UART1 can not used?


You can use the GPIO Matrix to remap UART1 to any other GPIOs which are unused.


I cut all wires to 6-11 and now show this


Looks like it's mostly working?

thanks , now work fine and let me flashing... but its rare.. I have ...

Thanks you for your answer.... I saw the PIN20 (CLK) i used for ADC... so I did cut the wire and now show this


rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load ...

Hi,I have the same problem... What I have bad?

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371

I tried put resistor 5K to GND on IO2 but same
Not let flashing...
I used a normal USB/TTL wire
http://subirimagen.me/uploads/20181031195203.PNG


LD ...

Thanks you... I does it

Component config > FreeRTOS
There is an entry called "Run FreeRTOS only on first core".

viewtopic.php?t=802

now its running

Please say me where I do it? make menuconfig or in code?