added HEX string type and option to disable auto-subscribe

README.md

@@ -256,6 +256,8 @@ configuration:
   http://www.bluetooth.org. Each characteristic can include a `name` field which
   will be used in the MQTT topic instead of its UUID and a `types` array
   defining how to parse the byte array reflecting the characteristic's value.
+  The `subscribe` attribute can be set to "false" if you don't want to automatically 
+  subscribe for Notifications and Indications on a Characteristic.
   In addition, it's possible to define a white/black list for discovered
   characteristics. The white/black list UUIDs may contain the wildcard character
   `?` to denote any value for a nibble. For example:
@@ -265,6 +267,7 @@ configuration:
       "definitions": {
         "00002f01-0000-1000-8000-00805f9b34fb": {
           "name": "Relay State",
+          "subscribe": true,
           "types": [
             "boolean"
           ]

main/ble2mqtt.c

@@ -458,8 +458,13 @@ static void ble_on_characteristic_found(mac_addr_t mac, ble_uuid_t service_uuid,
     /* Characteristic can notify / indicate on changes */
     if (properties & (CHAR_PROP_NOTIFY | CHAR_PROP_INDICATE))
     {
-        ble_characteristic_notify_register(mac, service_uuid,
-            characteristic_uuid);
+        if (config_ble_characteristic_should_subscribe(uuidtoa(characteristic_uuid)))
+        {
+            ESP_LOGI(TAG, "Register Notify characteristic: " UUID_FMT ".",
+                UUID_PARAM(characteristic_uuid));
+            ble_characteristic_notify_register(mac, service_uuid,
+                characteristic_uuid);
+        }
     }
 }
 

main/config.c

@@ -173,6 +173,22 @@ uint8_t config_ble_characteristic_should_include(const char *uuid)
     return json_is_in_lists(characteristics, uuid);
 }
 
+uint8_t config_ble_characteristic_should_subscribe(const char *uuid) 
+{
+    cJSON *subscribe = config_ble_get_name_by_uuid(0, uuid, "subscribe");
+
+    /* Not defined, to subscribe is default */
+    if (cJSON_IsTrue(subscribe))
+    {
+        return true;
+    }
+    else if (cJSON_IsFalse(subscribe))
+    {
+        return false;
+    }
+    return true;
+}
+
 uint8_t config_ble_service_should_include(const char *uuid)
 {
     cJSON *ble = cJSON_GetObjectItemCaseSensitive(config, "ble");

main/config.h

@@ -16,6 +16,7 @@ const char *config_ble_service_name_get(const char *uuid);
 const char *config_ble_characteristic_name_get(const char *uuid);
 const char **config_ble_characteristic_types_get(const char *uuid);
 uint8_t config_ble_characteristic_should_include(const char *uuid);
+uint8_t config_ble_characteristic_should_subscribe(const char *uuid);
 uint8_t config_ble_service_should_include(const char *uuid);
 uint8_t config_ble_should_connect(const char *mac);
 uint32_t config_ble_passkey_get(const char *mac);