Concatenate two strings in ESP-idf [duplicate]

Question

char AT[2] = "AT";
char AT_COMPLEMENT[4] = "\r\n";

How can I join the two strings in ESP-IDF?

tutorialspoint.com/c_standard_library/c_function_strcat.htm

Juraj
– Juraj

2021-11-06 16:38:49 +00:00
Commented Nov 6, 2021 at 16:38 — Juraj
– Juraj, Commented Nov 6, 2021 at 16:38

user2087695 · Accepted Answer · 2021-11-06 18:18:51Z

-4

Actually ESP-IDF uses C, so I fix it with this:

char *AT = "AT"; const char *AT_COMPLEMENT= "\r\n";

char * strcat (char * dest, const char * src)

edited Nov 6, 2021 at 18:18

answered Nov 6, 2021 at 18:10

user2087695

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3 Comments

Ke Zhang Over a year ago

You may write your answer in code style.

Juraj Over a year ago

esp-idf uses C.

hcheung Over a year ago

Your AT is a pointer to a string array of 3-byte long (including terminating \0), if you strcat(char* dest, const char* src) means strcat(AT, AT_COMPLEMNT), you will have an overflow on AT array, if may not crash immediately, but it will sooner or later.

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