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18752: nanocoap_sock: deprecate nanocoap_get() r=benpicco a=benpicco 19100: cpu/esp_common: allow configuration of UART0 r=benpicco a=gschorcht ### Contribution description This PR - fixes the issue for ESP32 SoCs that UART0 signals can't be routed to arbitrary GPIOs and - allows the configuration of the UART device used by the bootloader. The UART interface and its configuration used by the STDIO are defined in RIOT using the define `STDIO_UART_DEV` and the configuration of the corresponding UART device in `periph_conf.h`. However, the bootloader compiled directly in ESP-IDF uses its own definitions `CONFIG_ESP_CONSOLE_UART_*` for the UART configuration. To be able to use a consistent UART configuration in RIOT and the bootloader, e.g. to see the output of the 2nd stage bootloader, these `CONFIG_ESP_CONSOLE_UART_*` can be defined via a set of KConfig variables in RIOT (not yet implemented in Kconfig): - `CONSOLE_CONFIG_UART_NUM` defines the UART device to be used by the bootloader and by `STDIO_UART_DEV` - `CONSOLE_CONFIG_UART_RX` and `CONSOLE_CONFIG_UART_TX` define the GPIOs to be used by the bootloader and should be the GPIOs as defined in `periph_conf.h` for the corresponding UART device. ### Testing procedure Any ESP32 node should still work with `stdio_uart` and the default configuration. To test an alternative configuration, use ``` CFLAGS='-DUART1_TXD=5 -DUART1_RXD=4 -DCONFIG_CONSOLE_UART_NUM=1 -DCONFIG_CONSOLE_UART_TX=5 -DCONFIG_CONSOLE_UART_RX=4' USEMODULE=esp_log_startup BOARD=esp32-wroom-32 make -C tests/shell flash ``` The bootloader output and the STDIO should be routed to UART1 at GPIO4 and GPIO5. ### Issues/PRs references Prerequisite for PR ##18863 19104: tests/periph_uart: only exclude STDIO_UART_DEV if stdio_uart is used r=benpicco a=benpicco Co-authored-by: Benjamin Valentin <benjamin.valentin@ml-pa.com> Co-authored-by: Gunar Schorcht <gunar@schorcht.net> Co-authored-by: Benjamin Valentin <benjamin.valentin@bht-berlin.de>