diff --git a/src/index.ts b/src/index.ts
index a5fb510..906392c 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,34 +1,29 @@
 import { ByteBuffer } from 'flatbuffers';
 import { WeatherApiResponse } from '@openmeteo/sdk/weather-api-response';
 
-async function test_api_fetch() {
-  const params = {
-    latitude: '52.52,48.1,48.4',
-    longitude: '13.41,9.31,8.5',
-    hourly: 'temperature_2m,precipitation,windspeed_10m',
-    timezone: 'auto',
-    current: 'temperature_2m,precipitation',
-    format: 'flatbuffers',
-  };
-  const urlParams = new URLSearchParams(params).toString();
-  const response = await fetch(
-    `https://api.open-meteo.com/v1/forecast?${urlParams}`
-  );
+async function weather_api(
+  url: string,
+  params: any
+): Promise<WeatherApiResponse[]> {
+  const urlParams = new URLSearchParams(params);
+  urlParams.set('format', 'flatbuffers');
+  const response = await fetch(`${url}?${urlParams.toString()}`);
   const bb = await response.arrayBuffer();
   const fb = new ByteBuffer(new Uint8Array(bb));
 
+  // TODO: retry, error handling
+
   const results: WeatherApiResponse[] = [];
   let pos = 0;
   while (pos < fb.capacity()) {
+    fb.setPosition(pos);
     const len = fb.readInt32(fb.position());
     results.push(
       WeatherApiResponse.getSizePrefixedRootAsWeatherApiResponse(fb)
     );
     pos += len + 4;
-    fb.setPosition(pos);
   }
   return results;
 }
 
-export { test_api_fetch, WeatherApiResponse };
-// const myPackage = (taco = ''): string => `${taco} from my package`;
+export { weather_api };
diff --git a/test/index.spec.ts b/test/index.spec.ts
index 4b9e9d1..a10a3a7 100644
--- a/test/index.spec.ts
+++ b/test/index.spec.ts
@@ -1,83 +1,94 @@
-import { test_api_fetch } from '../src';
-
-global.fetch = jest.fn(() =>
-  Promise.resolve({
-    // 2 location data, with hourly temp and precip
-    /*
-        "latitude": [52.54, 48.1],
-        "longitude": [13.41, 9.31],
-        "hourly": ["temperature_2m", "precipitation"],
-        "start_date": "2023-08-01",
-        "end_date": "2023-08-01",
-    }*/
-    arrayBuffer: () =>
-      Promise.resolve(
-        new Uint8Array([
-          228, 1, 0, 0, 28, 0, 0, 0, 24, 0, 30, 0, 24, 0, 20, 0, 16, 0, 15, 0,
-          8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 24, 0, 0, 0, 184, 0, 0, 0, 0, 65,
-          135, 61, 0, 0, 0, 26, 0, 0, 112, 66, 112, 102, 86, 65, 0, 0, 82, 66,
-          0, 0, 158, 0, 36, 0, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0,
-          158, 0, 0, 0, 32, 0, 0, 0, 148, 0, 0, 0, 0, 75, 200, 100, 0, 0, 0, 0,
-          128, 156, 201, 100, 0, 0, 0, 0, 16, 14, 0, 0, 0, 0, 0, 0, 144, 255,
-          255, 255, 0, 0, 0, 9, 4, 0, 0, 0, 24, 0, 0, 0, 154, 153, 217, 63, 102,
-          102, 6, 64, 0, 0, 128, 63, 205, 204, 76, 62, 205, 204, 204, 61, 0, 0,
-          128, 63, 102, 102, 38, 64, 205, 204, 76, 64, 0, 0, 0, 64, 102, 102,
-          102, 63, 154, 153, 153, 62, 205, 204, 44, 64, 154, 153, 153, 63, 205,
-          204, 76, 62, 0, 0, 0, 0, 205, 204, 204, 61, 154, 153, 153, 62, 102,
-          102, 102, 63, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 8, 0, 12, 0, 8, 0, 7, 0, 8, 0, 0, 0, 0, 0, 0, 1, 4, 0,
-          0, 0, 24, 0, 0, 0, 104, 145, 135, 65, 207, 247, 135, 65, 207, 247,
-          135, 65, 156, 196, 134, 65, 104, 145, 133, 65, 207, 247, 133, 65, 207,
-          247, 135, 65, 207, 247, 135, 65, 156, 196, 136, 65, 53, 94, 140, 65,
-          207, 247, 145, 65, 53, 94, 144, 65, 156, 196, 144, 65, 104, 145, 151,
-          65, 207, 247, 161, 65, 156, 196, 166, 65, 207, 247, 163, 65, 104, 145,
-          145, 65, 53, 94, 144, 65, 2, 43, 137, 65, 53, 94, 134, 65, 53, 94,
-          134, 65, 207, 247, 131, 65, 207, 247, 129, 65, 228, 1, 0, 0, 28, 0, 0,
-          0, 24, 0, 30, 0, 24, 0, 20, 0, 16, 0, 15, 0, 8, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 4, 0, 24, 0, 0, 0, 184, 0, 0, 0, 0, 78, 237, 60, 0, 0, 0, 26, 0,
-          0, 33, 68, 208, 204, 20, 65, 104, 102, 64, 66, 0, 0, 158, 0, 36, 0,
-          12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 158, 0, 0, 0, 32, 0,
-          0, 0, 148, 0, 0, 0, 0, 75, 200, 100, 0, 0, 0, 0, 128, 156, 201, 100,
-          0, 0, 0, 0, 16, 14, 0, 0, 0, 0, 0, 0, 144, 255, 255, 255, 0, 0, 0, 9,
-          4, 0, 0, 0, 24, 0, 0, 0, 154, 153, 153, 62, 0, 0, 0, 63, 154, 153,
-          153, 62, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 205, 204, 204, 61, 0, 0,
-          128, 63, 154, 153, 153, 63, 205, 204, 12, 64, 154, 153, 217, 63, 51,
-          51, 179, 63, 154, 153, 153, 62, 205, 204, 76, 63, 0, 0, 0, 64, 205,
-          204, 76, 64, 205, 204, 204, 62, 205, 204, 204, 61, 205, 204, 204, 61,
-          0, 0, 0, 0, 205, 204, 204, 61, 205, 204, 204, 61, 205, 204, 76, 62,
-          205, 204, 204, 61, 8, 0, 12, 0, 8, 0, 7, 0, 8, 0, 0, 0, 0, 0, 0, 1, 4,
-          0, 0, 0, 24, 0, 0, 0, 180, 72, 134, 65, 26, 175, 132, 65, 231, 123,
-          133, 65, 26, 175, 136, 65, 26, 175, 136, 65, 129, 21, 137, 65, 129,
-          21, 137, 65, 129, 21, 131, 65, 180, 72, 132, 65, 78, 226, 131, 65, 78,
-          226, 133, 65, 129, 21, 135, 65, 231, 123, 143, 65, 231, 123, 151, 65,
-          26, 175, 142, 65, 129, 21, 145, 65, 180, 72, 142, 65, 129, 21, 139,
-          65, 78, 226, 133, 65, 26, 175, 128, 65, 206, 247, 118, 65, 2, 43, 110,
-          65, 155, 196, 103, 65, 206, 247, 94, 65,
-        ]).buffer
-      ),
-    json: () => Promise.resolve({ test: 100 }),
-  })
-) as jest.Mock;
+import { weather_api } from '../src';
 
 describe('index', () => {
   describe('myPackage', () => {
     test('aaaaa', async () => {
-      const a = await test_api_fetch();
-      console.log(a[0].latitude());
-      console.log(a.length);
-      //expect(a.latitude()).toBe(47);
+      // 2 location data, with hourly temp and precip
+      global.fetch = jest.fn(() =>
+        Promise.resolve({
+          arrayBuffer: () =>
+            Promise.resolve(
+              new Uint8Array([
+                228, 1, 0, 0, 28, 0, 0, 0, 24, 0, 30, 0, 24, 0, 20, 0, 16, 0,
+                15, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 24, 0, 0, 0, 184, 0,
+                0, 0, 0, 65, 135, 61, 0, 0, 0, 26, 0, 0, 112, 66, 112, 102, 86,
+                65, 0, 0, 82, 66, 0, 0, 158, 0, 36, 0, 12, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 158,
+                0, 0, 0, 32, 0, 0, 0, 148, 0, 0, 0, 0, 75, 200, 100, 0, 0, 0, 0,
+                128, 156, 201, 100, 0, 0, 0, 0, 16, 14, 0, 0, 0, 0, 0, 0, 144,
+                255, 255, 255, 0, 0, 0, 9, 4, 0, 0, 0, 24, 0, 0, 0, 154, 153,
+                217, 63, 102, 102, 6, 64, 0, 0, 128, 63, 205, 204, 76, 62, 205,
+                204, 204, 61, 0, 0, 128, 63, 102, 102, 38, 64, 205, 204, 76, 64,
+                0, 0, 0, 64, 102, 102, 102, 63, 154, 153, 153, 62, 205, 204, 44,
+                64, 154, 153, 153, 63, 205, 204, 76, 62, 0, 0, 0, 0, 205, 204,
+                204, 61, 154, 153, 153, 62, 102, 102, 102, 63, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 12,
+                0, 8, 0, 7, 0, 8, 0, 0, 0, 0, 0, 0, 1, 4, 0, 0, 0, 24, 0, 0, 0,
+                104, 145, 135, 65, 207, 247, 135, 65, 207, 247, 135, 65, 156,
+                196, 134, 65, 104, 145, 133, 65, 207, 247, 133, 65, 207, 247,
+                135, 65, 207, 247, 135, 65, 156, 196, 136, 65, 53, 94, 140, 65,
+                207, 247, 145, 65, 53, 94, 144, 65, 156, 196, 144, 65, 104, 145,
+                151, 65, 207, 247, 161, 65, 156, 196, 166, 65, 207, 247, 163,
+                65, 104, 145, 145, 65, 53, 94, 144, 65, 2, 43, 137, 65, 53, 94,
+                134, 65, 53, 94, 134, 65, 207, 247, 131, 65, 207, 247, 129, 65,
+                228, 1, 0, 0, 28, 0, 0, 0, 24, 0, 30, 0, 24, 0, 20, 0, 16, 0,
+                15, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 24, 0, 0, 0, 184, 0,
+                0, 0, 0, 78, 237, 60, 0, 0, 0, 26, 0, 0, 33, 68, 208, 204, 20,
+                65, 104, 102, 64, 66, 0, 0, 158, 0, 36, 0, 12, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0,
+                158, 0, 0, 0, 32, 0, 0, 0, 148, 0, 0, 0, 0, 75, 200, 100, 0, 0,
+                0, 0, 128, 156, 201, 100, 0, 0, 0, 0, 16, 14, 0, 0, 0, 0, 0, 0,
+                144, 255, 255, 255, 0, 0, 0, 9, 4, 0, 0, 0, 24, 0, 0, 0, 154,
+                153, 153, 62, 0, 0, 0, 63, 154, 153, 153, 62, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 205, 204, 204, 61, 0, 0, 128, 63, 154, 153,
+                153, 63, 205, 204, 12, 64, 154, 153, 217, 63, 51, 51, 179, 63,
+                154, 153, 153, 62, 205, 204, 76, 63, 0, 0, 0, 64, 205, 204, 76,
+                64, 205, 204, 204, 62, 205, 204, 204, 61, 205, 204, 204, 61, 0,
+                0, 0, 0, 205, 204, 204, 61, 205, 204, 204, 61, 205, 204, 76, 62,
+                205, 204, 204, 61, 8, 0, 12, 0, 8, 0, 7, 0, 8, 0, 0, 0, 0, 0, 0,
+                1, 4, 0, 0, 0, 24, 0, 0, 0, 180, 72, 134, 65, 26, 175, 132, 65,
+                231, 123, 133, 65, 26, 175, 136, 65, 26, 175, 136, 65, 129, 21,
+                137, 65, 129, 21, 137, 65, 129, 21, 131, 65, 180, 72, 132, 65,
+                78, 226, 131, 65, 78, 226, 133, 65, 129, 21, 135, 65, 231, 123,
+                143, 65, 231, 123, 151, 65, 26, 175, 142, 65, 129, 21, 145, 65,
+                180, 72, 142, 65, 129, 21, 139, 65, 78, 226, 133, 65, 26, 175,
+                128, 65, 206, 247, 118, 65, 2, 43, 110, 65, 155, 196, 103, 65,
+                206, 247, 94, 65,
+              ]).buffer
+            ),
+          json: () => Promise.resolve({ test: 100 }),
+        })
+      ) as jest.Mock;
+
+      const params = {
+        latitude: [52.54, 48.1],
+        longitude: [13.41, 9.31],
+        hourly: ['temperature_2m', 'precipitation'],
+        start_date: '2023-08-01',
+        end_date: '2023-08-01',
+        format: 'flatbuffers',
+      };
+      const url = 'https://api.open-meteo.com/v1/forecast';
+      const a = await weather_api(url, params);
+      expect(a).toHaveLength(2);
+      expect(a[0].latitude()).toBeCloseTo(52.5, 2);
+      expect(a[1].latitude()).toBeCloseTo(48.1, 2);
+      const temperature_2m = a[0].hourly()?.temperature2m()?.valuesArray();
+      expect(temperature_2m).toBeDefined();
+      expect(temperature_2m).toHaveLength(24);
+      expect(temperature_2m![0]).toBeCloseTo(16.9459991, 2);
     });
   });
 });