// Get the peripheral destructor callback. It allows changing/restoring 
// the peripheral pin function detaching, if necessary
// returns NULL if none is set
peripheral_bus_deinit_cb_t perimanGetBusDeinit(peripheral_bus_type_t type);

#include "esp32-hal-periman.h"
static bool _uartRXPinDetachBus(void *busptr) {
 // does nothing and keeps the UART driver running attached to RX pin
 log_d("_uartRXPinDetachBus called");
 return true;
}
void setup(){
 Serial.begin(115200); // Serial defaults pins with default detach periman CB
 // store the UART RX deinit function, bus#, channel# and bus pointer 
 peripheral_bus_deinit_cb_t UART_RX_PerimanCB = perimanGetBusDeinit(ESP32_BUS_TYPE_UART_RX);
 int8_t UART0_busNum = perimanGetPinBusNum(RX);
 int8_t UART0_channel = perimanGetPinBusNum(RX);
 void *UART0_bus = perimanGetPinBus(RX, ESP32_BUS_TYPE_UART_RX);
 // change the UART RX detaching function -- TX kept the same
 perimanSetBusDeinit(ESP32_BUS_TYPE_UART_RX, _uartRXPinDetachBus);
 Serial.println("TESTING UART0 TX ...");
 pinMode(RX, INPUT); // changes the UART0 RX pin function to GPIO INPUT, but doesn't dettach UART RX function
 for (int i = 0; i < 10; i++) {
 int val = digitalRead(RX); // read it as DIGITAL level
 Serial.println("#" + String(i) + " Read Val = " + String (val ? "HIGH" : "LOW"));
 delay(500);
 }
 // restore the UART RX detach function
 perimanSetBusDeinit(ESP32_BUS_TYPE_UART_RX, UART_RX_PerimanCB);
 perimanSetPinBus(RX, ESP32_BUS_TYPE_UART_RX, UART0_bus, UART0_busNum, UART0_channel);
 Serial.println("Ending the UART0 - Check the verbose log output.");
 Serial.flush();
 // detaching UART0 RX - check Verbose Log output
 pinMode(RX, OUTPUT); // changes the UART0 RX pin function to GPIO OUTPUT
}
void loop() {}

ets Jul 29 2019 12:21:46
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:4980
load:0x40078000,len:16612
load:0x40080400,len:3480
entry 0x400805b4
[ 1][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_RX (2) successfully set to 0x400d3ab0
[ 12][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_TX (3) successfully set to 0x400d3a80
[ 26][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_CTS (4) successfully set to 0x400d3a50
[ 39][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_RTS (5) successfully set to 0x400d3a20
[ 53][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_RX (2) successfully set to 0x400d3ab0
[ 66][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_TX (3) successfully set to 0x400d3a80
[ 80][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_CTS (4) successfully set to 0x400d3a50
[ 93][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_RTS (5) successfully set to 0x400d3a20
[ 107][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_RX (2) successfully set to 0x400d3ab0
[ 120][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_TX (3) successfully set to 0x400d3a80
[ 133][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_CTS (4) successfully set to 0x400d3a50
[ 147][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_RTS (5) successfully set to 0x400d3a20
f�B�ʢJ�*��}��ɕ}�յ�}���͡� Incorrect size of core dump image: 1098975400
[ 163][D][esp32-hal-cpu.c:276] setCpuFrequencyMhz(): PLL: 480 / 2 = 240 Mhz, APB: 80000000 Hz
[ 214][V][esp32-hal-periman.c:160] perimanSetPinBus(): Pin 3 successfully set to type UART_RX (2) with bus 0x3ffbdb60
[ 224][V][esp32-hal-periman.c:160] perimanSetPinBus(): Pin 1 successfully set to type UART_TX (3) with bus 0x3ffbdb60
=========== Before Setup Start ===========
Chip Info:
------------------------------------------
 Model : ESP32
 Package : D0WD-Q5
 Revision : 3.00
 Cores : 2
 CPU Frequency : 240 MHz
 XTAL Frequency : 40 MHz
 Features Bitfield : 0x00000032
 Embedded Flash : No
 Embedded PSRAM : No
 2.4GHz WiFi : Yes
 Classic BT : Yes
 BT Low Energy : Yes
 IEEE 802.15.4 : No
------------------------------------------
 BT Low Energy : Yes
 IEEE 802.15.4 : No
------------------------------------------
INTERNAL Memory Info:
------------------------------------------
 Total Size : 378936 B ( 370.1 KB)
 Free Bytes : 336688 B ( 328.8 KB)
 Allocated Bytes : 34764 B ( 33.9 KB)
 Minimum Free Bytes: 330836 B ( 323.1 KB)
 Largest Free Block: 110580 B ( 108.0 KB)
------------------------------------------
Flash Info:
------------------------------------------
 Chip Size : 8388608 B (8 MB)
 Block Size : 65536 B ( 64.0 KB)
 Sector Size : 4096 B ( 4.0 KB)
 Page Size : 256 B ( 0.2 KB)
 Bus Speed : 80 MHz
 Bus Mode : QIO
------------------------------------------
Partitions Info:
------------------------------------------
 nvs : addr: 0x00009000, size: 20.0 KB, type: DATA, subtype: NVS
 otadata : addr: 0x0000E000, size: 8.0 KB, type: DATA, subtype: OTA
 app0 : addr: 0x00010000, size: 1280.0 KB, type: APP, subtype: OTA_0
 app1 : addr: 0x00150000, size: 1280.0 KB, type: APP, subtype: OTA_1
 spiffs : addr: 0x00290000, size: 1408.0 KB, type: DATA, subtype: SPIFFS
 coredump : addr: 0x003F0000, size: 64.0 KB, type: DATA, subtype: COREDUMP
------------------------------------------
Software Info:
------------------------------------------
 Compile Date/Time : Sep 4 2025 11:51:12
 Compile Host OS : windows
 ESP-IDF Version : v5.5-1-gb66b5448e0
 Arduino Version : 3.3.0
------------------------------------------
Board Info:
------------------------------------------
 Arduino Board : ESP32_DEV
 Arduino Variant : esp32
 Arduino FQBN : espressif:orig:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=verbose,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default
============ Before Setup End ============
[ 733][V][esp32-hal-uart.c:707] uartBegin(): UART0 baud(115200) Mode(800001c) rxPin(3) txPin(1)
[ 742][V][esp32-hal-uart.c:805] uartBegin(): UART0 not installed. Starting installation
[ 752][V][esp32-hal-uart.c:815] uartBegin(): UART0 RX FIFO full threshold set to 120 (value requested: 120 || FIFO Max = 128)
[ 766][V][esp32-hal-uart.c:845] uartBegin(): Setting UART0 to use REF_TICK clock
[ 776][V][esp32-hal-uart.c:905] uartBegin(): UART0 initialization done.
[ 791][V][esp32-hal-uart.c:956] uartSetRxFIFOFull(): UART0 RX FIFO Full value set to 120 from a requested value of 120
[ 801][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_RX (2) successfully set to 0x400d1840
TESTING UART0 TX ...
[ 812][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type GPIO (1) successfully set to 0x400f3620
[ 825][D][Blink.ino:5] _uartRXPinDetachBus(): _uartRXPinDetachBus called
[ 832][V][esp32-hal-periman.c:160] perimanSetPinBus(): Pin 3 successfully set to type INIT (0) with bus 0x0
[ 842][V][esp32-hal-periman.c:160] perimanSetPinBus(): Pin 3 successfully set to type GPIO (1) with bus 0x4
#0 Read Val = HIGH
#1 Read Val = LOW
#2 Read Val = HIGH
#3 Read Val = LOW
#4 Read Val = LOW
#5 Read Val = HIGH
#6 Read Val = HIGH
#7 Read Val = LOW
#8 Read Val = LOW
#9 Read Val = HIGH
[ 5851][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type UART_RX (2) successfully set to 0x400d3ab0
[ 5863][V][esp32-hal-periman.c:160] perimanSetPinBus(): Pin 3 successfully set to type UART_RX (2) with bus 0x3ffbdb60
Ending the UART0 - Check the verbose log output.
[ 5877][V][esp32-hal-periman.c:235] perimanSetBusDeinit(): Deinit function for type GPIO (1) successfully set to 0x400f3620
[ 5888][V][esp32-hal-periman.c:160] perimanSetPinBus(): Pin 3 successfully set to type INIT (0) with bus 0x0
[ 5898][V][esp32-hal-periman.c:160] perimanSetPinBus(): Pin 3 successfully set to type INIT (0) with bus 0x0
[ 5908][V][esp32-hal-periman.c:160] perimanSetPinBus(): Pin 3 successfully set to type GPIO (1) with bus 0x4
=========== After Setup Start ============
INTERNAL Memory Info:
------------------------------------------
 Total Size : 378936 B ( 370.1 KB)
 Free Bytes : 334216 B ( 326.4 KB)
 Allocated Bytes : 36948 B ( 36.1 KB)
 Minimum Free Bytes: 328216 B ( 320.5 KB)
 Largest Free Block: 110580 B ( 108.0 KB)
------------------------------------------
GPIO Info:
------------------------------------------
 GPIO : BUS_TYPE[bus/unit][chan]
 -------------------------------------- 
 1 : UART_TX[0]
 3 : GPIO
============ After Setup End =============