Both V1 and V2 are extremely difficult to use. (IDFGH-15257)

[lbxhacker]

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Issue or Suggestion Description

I have been using this library file to continuously modify and adjust for five days, but there are still inexplicable memory crash issues. Especially when initializing the TCP master station, even after deleting and releasing resources, it still cannot be initialized normally. To be honest, this library is very difficult to use. Another point I want to joke about is the TCP case. Why not be direct Can it be implemented using a normal expression method, such as char* dest_ip="192.168.1.100"? Rather, is it to be achieved through the so-called command receiving method? Is this to show off skills? My mood has become very bad because of writing adaptation for this library

[lbxhacker]

Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled.

Core 0 register dump:
PC : 0x40382c8d PS : 0x00060733 A0 : 0x8202f49c A1 : 0x3fcd0190
--- 0x40382c8d: xEventGroupClearBits at C:/esp/ESP-IDF-5.3.2/esp-idf/components/freertos/FreeRTOS-Kernel/event_groups.c:504

A2 : 0x00000000 A3 : 0x00000080 A4 : 0x8038269e A5 : 0x3fc9aaa0
A6 : 0x0000001c A7 : 0x00000000 A8 : 0x80382c8b A9 : 0x3fcd0170
A10 : 0x00000001 A11 : 0xffffffff A12 : 0x00060720 A13 : 0x00000002
A14 : 0xffffffff A15 : 0x3c2f0aac SAR : 0x00000019 EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000000 LBEG : 0x400556d5 LEND : 0x400556e5 LCOUNT : 0xfffffffc

Backtrace: 0x40382c8a:0x3fcd0190 0x4202f499:0x3fcd01b0 0x4202ce3d:0x3fcd01e0 0x420179bf:0x3fcd0210
--- 0x40382c8a: vPortEnterCritical at C:/esp/ESP-IDF-5.3.2/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/include/freertos/portmacro.h:567
--- (inlined by) xEventGroupClearBits at C:/esp/ESP-IDF-5.3.2/esp-idf/components/freertos/FreeRTOS-Kernel/event_groups.c:498
--- 0x4202f499: mbc_tcp_master_stop at C:/Project/GBTX-PRO/components/esp-modbus-2.0.2/modbus/mb_controller/tcp/mbc_tcp_master.c:114
--- 0x4202ce3d: mbc_master_stop at C:/Project/GBTX-PRO/components/esp-modbus-2.0.2/modbus/mb_controller/common/esp_modbus_master.c:221
--- 0x420179bf: Modbus_Master_TCP_init at C:/Project/GBTX-PRO/components/Cat-Modbus/Cat-Modbus_Master.h:57
--- (inlined by) modbus_tcp_creat_task at C:/Project/GBTX-PRO/src/Form/Form1_Modbus_Master.h:837

This is a crash that occurs after creating TCP communication. It doesn't happen all the time; it always crashes unexpectedly

[Godoy-Octavio]

Hello, @lbxhacker

Thank you for reporting this issue. In order to reproduce this error we need more information, could you provide the initialization sequence code you are using?

We are aware that the modbus example code is not that straightforward, we are currently working on a simplified version of it.

Please refer to this alternative modbus example with a simpler approach:

Simplified Modbus Master example

Let us know if you encounter any further issues!

[wuyuanyi135]

Second this. The example is pretty much a unittest rather than a Hello World.

[alisitsyn]

@wuyuanyi135 ,
The simple examples will be added.