Thank you so much!

I made sure to flip queue_num after task notify, not before, and it worked
if (xQueueSendFromISR(queue_cb, &cb_data->num, NULL) != pdPASS) {
// notify compute_avg task - index 0
xTaskNotifyIndexedFromISR(x_compute_avg_task, 0, (uint32_t) cb_data->queue_num ...

Hi,

Some background :
I have 2 tasks. The app_main task creates a HW timer that runs an ISR (timer callback) to sample from ADC 10 times per second. These sampled values are then sent to queue1/queue2 - the queue that the values get sent to alternates (depending on which queue is full (queue ...

It works! Thank you so much

The sanity test for FTDI adapter was successful. And this time, when connecting the adapter I only connected RX and TX to ESP32.

The 3.3V -> 3.3V connection was the culprit (based off of previous setup).

So, in theory, if I connect my ESP32 board's GPIO16 (RX) and GPIO17 (TX) to my PC (while keeping its USB-to-UART0 bridge connection intact), using FTDI USB-to-TTL adapter, like so

adapter -> ESP32
============
TX -> GPIO16
RX -> GPIO17
3.3V -> 3.3V
GND -> GND

and opening its corresponding ttyUSB1 ...

No. Is that done on config level?

When I looked for UART configs in menuconfig,

Component Config > Driver Configurations > UART Configuration

I only saw "Place UART ISR function into IRAM" config option.

Hi

I'm using ESP32-WROOM-32U. I'm new to ESP-IDF and so decided to learn how to write a simple uart echo program.

I used the following resources,
https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/peripherals/uart.html#uart-api-running-uart-communication
https://github ...

Thanks, @ Xylopyrographer! Your response helped

Hey @felmue

can you explain what is the connection between GPIO1/U0TXD and powerup? I want to understand how you've made your guess.