ESP32 Web Server (ESP-IDF v5.0.1) displaying temperature data from two DS18B20 sensors

[@timofey.pro]

I have tested ESP32-DevKitC V4: ESP32-WROOM-32E, which was connected to two DS18B20 sensors and temperature data is passed to mobile via WiFi.
Please check my ESP-IDF v5.0.1 code which was published on GitHub: https://github.com/TimofeyPro/ESP32-ESP ... er-DS18B20
As a result of this solution you may see on mobile screen the following:
1. temperature data from two DS18B20 sensors
2. Sensor addresses on 1-Wire bus
3. MAC address of ESP32
4. ESP32 system time which was synchronized with SNTP server (pool.ntp.org).

Please let me know if you have any suggestions and questions.

[in10city]

A huge Thank You;
1. The Temp sensors are // Temp Sensors are on GPIO26 ; #define TEMP_BUS 17

2. When running without a connection to the wifi I had an error, which seems to be a IDF issue ?

I have attached the trace below.

Code: Select all

Waiting for the device to reconnect.
None
Waiting for the device to reconnect
I (17725) example_connect: WiFi Connect failed 7 times, stop reconnect.
ESP_ERROR_CHECK failed: esp_err_t 0xffffffff (ESP_FAIL) at 0x400d7e4a
0x400d7e4a: app_main at D:/work/vscode/sample1/main/main.c:404 (discriminator 1)

file: "./main/main.c" line 404
func: app_main
expression: example_connect()

abort() was called at PC 0x40088c9f on core 0
0x40088c9f: _esp_error_check_failed at C:/Users/movin/esp51/esp-idf/components/esp_system/esp_err.c:50



Backtrace: 0x400819c2:0x3ffba5b0 0x40088ca9:0x3ffba5d0 0x4008fbce:0x3ffba5f0 0x40088c9f:0x3ffba660 0x400d7e4a:0x3ffba690 0x4015f0cf:0x3ffba740 0x4008b689:0x3ffba770
0x400819c2: panic_abort at C:/Users/movin/esp51/esp-idf/components/esp_system/panic.c:452

0x40088ca9: esp_system_abort at C:/Users/movin/esp51/esp-idf/components/esp_system/port/esp_system_chip.c:84

0x4008fbce: abort at C:/Users/movin/esp51/esp-idf/components/newlib/abort.c:38

0x40088c9f: _esp_error_check_failed at C:/Users/movin/esp51/esp-idf/components/esp_system/esp_err.c:50

0x400d7e4a: app_main at D:/work/vscode/sample1/main/main.c:404 (discriminator 1)

0x4015f0cf: main_task at C:/Users/movin/esp51/esp-idf/components/freertos/app_startup.c:208 (discriminator 13)

0x4008b689: vPortTaskWrapper at C:/Users/movin/esp51/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/port.c:162





ELF file SHA256: eb5ee7509074330d

Rebooting...
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_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:2
load:0x3fff0030,len:7076
load:0x40078000,len:15576
load:0x40080400,len:4
0x40080400: _init at ??:?

load:0x40080404,len:3876
entry 0x4008064c
I (29) boot: ESP-IDF v5.1 2nd stage bootloader
I (29) boot: compile time Jul  8 2023 21:57:39
I (29) boot: Multicore bootloader
I (33) boot: chip revision: v1.0
I (37) boot.esp32: SPI Speed      : 40MHz
I (42) boot.esp32: SPI Mode       : DIO
I (46) boot.esp32: SPI Flash Size : 2MB
I (51) boot: Enabling RNG early entropy source...
I (56) boot: Partition Table:
I (60) boot: ## Label            Usage          Type ST Offset   Length
I (67) boot:  0 nvs              WiFi data        01 02 00009000 00006000
I (74) boot:  1 phy_init         RF data          01 01 0000f000 00001000
I (82) boot:  2 factory          factory app      00 00 00010000 00100000
I (89) boot: End of partition table
I (94) esp_image: segment 0: paddr=00010020 vaddr=3f400020 size=24390h (148368) map
I (156) esp_image: segment 1: paddr=000343b8 vaddr=3ffb0000 size=03e10h ( 15888) load
I (162) esp_image: segment 2: paddr=000381d0 vaddr=40080000 size=07e48h ( 32328) load
I (176) esp_image: segment 3: paddr=00040020 vaddr=400d0020 size=90f18h (593688) map
I (390) esp_image: segment 4: paddr=000d0f40 vaddr=40087e48 size=0d728h ( 55080) load
I (413) esp_image: segment 5: paddr=000de670 vaddr=50000000 size=00004h (     4) load
I (425) boot: Loaded app from partition at offset 0x10000
I (425) boot: Disabling RNG early entropy source...
I (436) cpu_start: Multicore app
I (437) cpu_start: Pro cpu up.
I (437) cpu_start: Starting app cpu, entry point is 0x4008136c
0x4008136c: call_start_cpu1 at C:/Users/movin/esp51/esp-idf/components/esp_system/port/cpu_start.c:154

I (425) cpu_start: App cpu up.
I (455) cpu_start: Pro cpu start user code
I (455) cpu_start: cpu freq: 160000000 Hz
I (455) cpu_start: Application information:
I (459) cpu_start: Project name:     tim33_prod
I (465) cpu_start: App version:      1
I (469) cpu_start: Compile time:     Jul  8 2023 21:56:56
I (475) cpu_start: ELF file SHA256:  eb5ee7509074330d...
I (481) cpu_start: ESP-IDF:          v5.1
I (486) cpu_start: Min chip rev:     v0.0
I (491) cpu_start: Max chip rev:     v3.99 
I (495) cpu_start: Chip rev:         v1.0
I (500) heap_init: Initializing. RAM available for dynamic allocation:
I (507) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (513) heap_init: At 3FFB8448 len 00027BB8 (158 KiB): DRAM
I (520) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (526) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (532) heap_init: At 40095570 len 0000AA90 (42 KiB): IRAM
I (540) spi_flash: detected chip: generic
I (543) spi_flash: flash io: dio
W (547) spi_flash: Detected size(4096k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (561) app_start: Starting scheduler on CPU0
I (565) app_start: Starting scheduler on CPU1
I (565) main_task: Started on CPU0
I (575) main_task: Calling app_main()
I (575) tim-info==>: Boot count: 1
--------------------------------------------------------------------------
This is esp32 chip with 2 CPU core(s), WiFi/BT/BLE, silicon revision v1.0, 2MB external flash  
Minimum free heap size: 277768 bytes
--------------------------------------------------------------------------
I (635) example_connect: Start example_connect.
I (645) wifi:wifi driver task: 3ffc0114, prio:23, stack:6656, core=0
I (665) wifi:wifi firmware version: b2f1f86
I (665) wifi:wifi certification version: v7.0
I (665) wifi:config NVS flash: enabled
I (665) wifi:config nano formating: disabled
I (665) wifi:Init data frame dynamic rx buffer num: 32
I (675) wifi:Init management frame dynamic rx buffer num: 32
I (675) wifi:Init management short buffer num: 32
I (685) wifi:Init dynamic tx buffer num: 32
I (685) wifi:Init static rx buffer size: 1600
I (685) wifi:Init static rx buffer num: 10
I (695) wifi:Init dynamic rx buffer num: 32
I (695) wifi_init: rx ba win: 6
I (705) wifi_init: tcpip mbox: 32
I (705) wifi_init: udp mbox: 6
I (705) wifi_init: tcp mbox: 6
I (715) wifi_init: tcp tx win: 5744
I (715) wifi_init: tcp rx win: 5744
I (715) wifi_init: tcp mss: 1440
I (725) wifi_init: WiFi IRAM OP enabled
I (725) wifi_init: WiFi RX IRAM OP enabled
I (735) phy_init: phy_version 4670,719f9f6,Feb 18 2021,17:07:07
None
Waiting for the device to reconnect...
None
Waiting for the device to reconnect.........................................................................