Hi! I do not think the newlib cause the problems ,the macro ESP_LOGx calls the function esp_log_write, and esp_log_write calls the esp_log_writev like below: void esp_log_write(esp_log_level_t level, const char *tag, const char *format, ...) { va_list list; va_start(list, format); esp_log_writev(lev...

maybe you can change the sdkconfig file manually(CONFIG_ESPTOOLPY_FLASHSIZE)