I struggle with a SPI driver: my devices need some setup time between CS and CLK setup. Using command phase (command_bits>0), cs_ena_pretrans is avaliable only in HALFDUPLEX. HALFDUPLEX seems to loose some last received bytes if transaction before tx anything: // initialize spi_bus_config_t buscfg =...

Thanks @ESP_Sprite for your reply I have changed mode to HALF-DUPLEX and I've added CS delay (.cs_ena_pretrans), as you suggested. Basic communication started working but sending anything messes up in communication: static void ds1390_spi_init() { spi_bus_config_t buscfg = { .miso_io_num=PIN_NUM_SPI...

I struggle with a huge SPI driver malfunction: Lets take DS1390 RTC (but some problems occurs with all devices I've tested). Chip supports SPI in mode 1 or 3, up to 4MHz. After receiving address it replies with corresponding bytes of datetime. static void ds1390_spi_init() { spi_bus_config_t buscfg ...

Its not so easy and no one will provide you code you need I think.
Why dont you just buy ESP32-WROOM-32D 128Mbit version?

I am looking for any good looking display solution. Popular lcd tft displays, that i could connect via FT80x, have terrible contrast and looking angles. Monochrome oled displays (like WEO012864K) looks good but are relatively small and mostly described as end of production. Displays from cellphones ...

As suggested, adding mutex semaphore helped and fixed problems

Pins GPI36, GPI39, GPI34, GPI35 have no internal pull resistors (and if even they would, you disabled them).
When floating, lots of interrupts is triggered what cause karnel panic.

For logging use:

I've decided to send raw data. Bytes are now read and send to the browser without any parsing. That way I could use larger buffers and read more from memory to send. Whats more I know exactly how much data will be send.
On browser, javascript side I parse data using DataView, getUint32, getInt8

void initialise() { gpio_pad_select_gpio(PIN_NUM); gpio_set_direction(PIN_NUM, GPIO_MODE_INPUT); gpio_set_pull_mode(PIN_NUM, GPIO_PULLUP_ONLY); xTaskCreatePinnedToCore(&task, "task", 2048, NULL, TASK_PRIORITY, NULL, TASK_CORE_ID); } void task(void *pvParameters) { TickType_t xLastWakeTime = xTaskGe...

I use sd card for recording and storing some important process data. On core 1, every 200ms, I read one sector (using sdmmc_read_sectors), append 32bytes of new data and save (using sdmmc_write_sectors) the whole sector back. On core 0 I take care of wifi communication: When user asks for data I rea...