chatgpt_demo: support modify base URL through UF2

Close https://github.com/espressif/esp-box/issues/110

examples/chatgpt_demo/README.md

@@ -32,7 +32,7 @@ git checkout 53ff7d43dbff642d831a937b066ea0735a6aca24 && git pull && git submodu
 Due to the lack of native text-to-speech support in the [OpenAI](https://platform.openai.com/docs/api-reference) API, an external API is used to meet this requirement. This example utilizes the text-to-speech functionality offered by [TalkingGenie](https://www.talkinggenie.com/tts). Additional information can be found in this [blog post](https://czyt.tech/post/a-free-tts-api/?from_wecom=1).
 
 ### **Build and Flash**
-There is another project called **factory_nvs** within the **ChatGPT_demo** project. It includes the code to store credentials in the NVS (Non-Volatile Storage) of the ESP-Box. On the other hand, **Chat_GPT Demo** consists of the demo code. Therefore, it is essential to build both projects.
+There is another project named **factory_nvs** within the **ChatGPT_demo** project. It includes the code to store credentials in the NVS (Non-Volatile Storage) of the ESP-Box. On the other hand, **Chat_GPT Demo** consists of the demo code. Therefore, it is essential to build both projects.
 
 
 **1. Clone the Github repository**

examples/chatgpt_demo/factory_nvs/main/Kconfig.projbuild

@@ -15,5 +15,10 @@ menu "Example Configuration"
         default "sk-xxxxxxxx"
         help
             OpenAI api key for the example to use.
+    config OPENAI_URL
+        string "Base URL"
+        default "https://api.openai.com/v1/"
+        help
+            Base URL for OpenAI API
 
 endmenu
\ No newline at end of file

examples/chatgpt_demo/factory_nvs/main/main.c

@@ -20,6 +20,7 @@
 #define SSID_SIZE 32
 #define PASSWORD_SIZE 64
 #define KEY_SIZE 64
+#define URL_SIZE 64
 
 static const char *TAG = "ChatGPT_NVS";
 
@@ -46,6 +47,7 @@ void app_main(void)
     char ssid[SSID_SIZE] = {0};
     char password[PASSWORD_SIZE] = {0};
     char key[KEY_SIZE] = {0};
+    char url[URL_SIZE] = {0};
 
     s_event_group = xEventGroupCreate();
 
@@ -90,6 +92,16 @@ void app_main(void)
         } else {
             ESP_LOGI(TAG, "stored ChatGPT key:%s", key);
         }
+
+        buf_len_long = sizeof(url);
+        err = nvs_get_str(my_handle, "Base_url", url, &buf_len_long);
+        if (err != ESP_OK || buf_len_long == 0) {
+            ESP_ERROR_CHECK(nvs_set_str(my_handle, "Base_url", CONFIG_OPENAI_URL));
+            ESP_ERROR_CHECK(nvs_commit(my_handle));
+            ESP_LOGI(TAG, "no base url, give a init value to key");
+        } else {
+            ESP_LOGI(TAG, "stored base url:%s", url);
+        }
     }
     nvs_close(my_handle);
 
@@ -146,7 +158,14 @@ void app_main(void)
             }
             ESP_LOGD(TAG, "OpenAI Key", key);
 
-
+            buf_len_long = sizeof(url);
+            err = nvs_get_str(my_handle, "Base_url", url, &buf_len_long);
+            if (err != ESP_OK) {
+                ESP_LOGE(TAG, "Failed to read 'BASE_url' from NVS: %s", esp_err_to_name(err));
+                nvs_close(my_handle);
+                return;
+            }
+            ESP_LOGD(TAG, "BASE url", url);
             nvs_close(my_handle);
         }
 

examples/chatgpt_demo/main/idf_component.yml

 ## IDF Component Manager Manifest File
 dependencies:
-  espressif/openai: "^0.1.1"
+  espressif/openai: "^0.2.0"
   chmorgan/esp-file-iterator: "1.0.0"
   espressif/esp-sr: "1.3.3"

examples/chatgpt_demo/main/main.c

@@ -35,6 +35,7 @@ esp_err_t start_openai(uint8_t *audio, int audio_len)
 
     if (openai == NULL) {
         openai = OpenAICreate(sys_param->key);
+        OpenAIChangeBaseURL(openai, sys_param->url);
         audioTranscription = openai->audioTranscriptionCreate(openai);
         chatCompletion = openai->chatCreate(openai);
 

examples/chatgpt_demo/main/settings/settings.c

@@ -65,11 +65,21 @@ esp_err_t settings_read_parameter_from_nvs(void)
         ESP_LOGI(TAG, "No OpenAI key found");
         goto err;
     }
+
+    // Read url
+    len = sizeof(g_sys_param.url);
+    ret = nvs_get_str(my_handle, "Base_url", g_sys_param.url, &len);
+    if (ret != ESP_OK || len == 0) {
+        ESP_LOGI(TAG, "No OpenAI Base url found");
+        goto err;
+    }
+
     nvs_close(my_handle);
 
     ESP_LOGI(TAG, "stored ssid:%s", g_sys_param.ssid);
     ESP_LOGI(TAG, "stored password:%s", g_sys_param.password);
     ESP_LOGI(TAG, "stored OpenAI:%s", g_sys_param.key);
+    ESP_LOGI(TAG, "stored Base URL:%s", g_sys_param.url);
     return ESP_OK;
 
 err:

examples/chatgpt_demo/main/settings/settings.h

@@ -11,11 +11,13 @@
 #define SSID_SIZE 32
 #define PASSWORD_SIZE 64
 #define KEY_SIZE 64
+#define URL_SIZE 64
 
 typedef struct {
     char ssid[SSID_SIZE];             /* SSID of target AP. */
     char password[PASSWORD_SIZE];     /* Password of target AP. */
     char key[KEY_SIZE];               /* OpenAI key. */
+    char url[URL_SIZE];               /* OpenAI Base url. */
 } sys_param_t;
 
 esp_err_t settings_factory_reset(void);