esp-idf-json

Example of JSON Serialize and Deserialize with ESP-IDF.

ESP-IDF includes this cJSON library.
You can use JSON components as standard.
But the documentation is very poor.
The official documentation for the JSON component is here.

Here is a example by Dave Gamble.

How to use

git clone https://github.com/nopnop2002/esp-idf-json
cd esp-idf-json/json-basic
idf.py flash monitor

About cJSON_Print

From print_value() function, the pointer returned is allocated by cJSON_strdup() and it is returned to the caller.
Buffers returned by cJSON_Print must be freed by the caller.
Please use the proper API (cJSON_free) rather than directly calling stdlib free.

char *my_json_string = cJSON_Print(root);
ESP_LOGI(TAG, "my_json_string\n%s",my_json_string);
cJSON_Delete(root);
cJSON_free(my_json_string);