diff --git a/.prettierrc.yaml b/.prettierrc.yaml
index 3c7da0b7..eb4e4040 100644
--- a/.prettierrc.yaml
+++ b/.prettierrc.yaml
@@ -2,4 +2,4 @@ trailingComma: "all"
 tabWidth: 2
 semi: true
 singleQuote: true
-printWidth: 80
+printWidth: 120
diff --git a/backend/app.py b/backend/app.py
index 6e05e2ad..4f0b0a0c 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -1,9 +1,15 @@
-from flask import Flask
+from flask import Flask, request
 from flask_cors import CORS
 from waitress import serve
+from http import HTTPStatus
+
 
 app = Flask(__name__)
-cors = CORS(app)
+
+
+def allowed_file(filename):
+    ALLOWED_EXTENSIONS = {'txt', 'csv'}
+    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
 
 
 @app.route("/")
@@ -11,4 +17,27 @@ def hello():
     return "Hello, World!"
 
 
+@app.route('/analyze_sleep', methods=['POST'])
+def analyze_sleep():
+    if 'file' not in request.files:
+        return 'Missing file', HTTPStatus.BAD_REQUEST
+    file = request.files['file']
+
+    if file.filename == '':
+        return 'No selected file', HTTPStatus.BAD_REQUEST
+
+    if not allowed_file(file.filename):
+        return 'File format not allowed', HTTPStatus.BAD_REQUEST
+
+    file_content = file.read()
+    form_data = request.form.to_dict()
+
+    return ''
+
+
+CORS(app,
+     resources={r'/*': {"origins": '*'}},
+     allow_headers='Content-Type')
+app.config['CORS_HEADERS'] = 'Content-Type'
+
 serve(app, host='0.0.0.0', port=8080)
diff --git a/web/package.json b/web/package.json
index 60a47fd7..c97e43db 100644
--- a/web/package.json
+++ b/web/package.json
@@ -11,7 +11,7 @@
     "build": "react-scripts build",
     "test": "react-scripts test",
     "eject": "react-scripts eject",
-    "format": "yarn prettier --config ../.vscode/.prettierrc.yaml --write \"./**/*.{js,jsx,css,scss,json}\""
+    "format": "yarn prettier --config ../.prettierrc.yaml --write \"./**/*.{js,jsx,css,scss,json}\""
   },
   "eslintConfig": {
     "extends": "react-app"
@@ -25,6 +25,7 @@
   "dependencies": {
     "argon-design-system-react": "^1.1.0",
     "axios": "^0.20.0",
+    "axios-observable": "^1.1.3",
     "bootstrap": "^4.5.0",
     "classnames": "2.2.6",
     "d3": "^5.16.0",
@@ -41,6 +42,7 @@
     "react-scripts": "3.4.0",
     "react-waypoint": "^9.0.2",
     "reactstrap": "8.4.1",
+    "rxjs": "^6.6.3",
     "yarn": "^1.22.4"
   },
   "devDependencies": {
diff --git a/web/src/index.js b/web/src/index.js
index afa6bd23..960a5894 100644
--- a/web/src/index.js
+++ b/web/src/index.js
@@ -16,10 +16,6 @@ import Performance from 'views/performance';
 import AnalyzeSleep from 'views/analyze-sleep';
 import ScrollToTop from 'components/scroll_to_top';
 import Emoji from 'components/emoji';
-import * as axios from 'axios';
-
-// Communication with server (test)
-axios.get('http://localhost:8080').then(console.log);
 
 const underConstruction = () => {
   const text = {
diff --git a/web/src/requests/analayze-sleep.js b/web/src/requests/analayze-sleep.js
new file mode 100644
index 00000000..b223f439
--- /dev/null
+++ b/web/src/requests/analayze-sleep.js
@@ -0,0 +1,8 @@
+import { SERVER_URL } from './constants';
+import Axios from 'axios-observable';
+import { objectToFormData } from './object-to-formdata';
+
+export const analyzeSleep = (formData) =>
+  Axios.post(`${SERVER_URL}/analyze_sleep`, objectToFormData(formData), {
+    headers: { 'Content-Type': 'multipart/form-data' },
+  });
diff --git a/web/src/requests/constants.js b/web/src/requests/constants.js
new file mode 100644
index 00000000..e761c194
--- /dev/null
+++ b/web/src/requests/constants.js
@@ -0,0 +1 @@
+export const SERVER_URL = 'http://localhost:8080';
diff --git a/web/src/requests/object-to-formdata.js b/web/src/requests/object-to-formdata.js
new file mode 100644
index 00000000..ed7d6cb7
--- /dev/null
+++ b/web/src/requests/object-to-formdata.js
@@ -0,0 +1,7 @@
+export const objectToFormData = (obj) => {
+  const formData = new FormData();
+  for (const key in obj) {
+    formData.append(key, obj[key]);
+  }
+  return formData;
+};
diff --git a/web/src/requests/ping-server.js b/web/src/requests/ping-server.js
new file mode 100644
index 00000000..8b3265b7
--- /dev/null
+++ b/web/src/requests/ping-server.js
@@ -0,0 +1,12 @@
+import { SERVER_URL } from './constants';
+import Axios from 'axios-observable';
+import { catchError, exhaustMap, map } from 'rxjs/operators';
+import { timer, of } from 'rxjs';
+
+const pingServer = () =>
+  Axios.get(SERVER_URL).pipe(
+    map(() => true),
+    catchError(() => of(false)),
+  );
+
+export const periodicPingServer = (period) => timer(0, period).pipe(exhaustMap(pingServer));
diff --git a/web/src/views/analyze-sleep/index.js b/web/src/views/analyze-sleep/index.js
index d6d14810..429583ff 100644
--- a/web/src/views/analyze-sleep/index.js
+++ b/web/src/views/analyze-sleep/index.js
@@ -1,15 +1,22 @@
-import React from 'react';
+import React, { useEffect, useState } from 'react';
 import { Container } from 'reactstrap';
-
 import Header from 'components/header';
 import WaitingForServerToBeReady from './waiting-for-server-to-be-ready';
 import UploadForm from './upload-form';
-
 import text from './text.json';
-
-const isServerReady = true;
+import { periodicPingServer } from 'requests/ping-server';
 
 const AnalyzeSleep = () => {
+  const [serverReady, setServerReady] = useState(false);
+
+  useEffect(() => {
+    const subscription = periodicPingServer(200).subscribe(
+      (ready) => setServerReady(ready),
+      () => null,
+    );
+    return () => subscription.unsubscribe();
+  });
+
   return (
     <div>
       <Header
@@ -19,7 +26,14 @@ const AnalyzeSleep = () => {
         subtitle={text['header_subtitle']}
         description={text['header_description']}
       />
-      <Container className="mt-5 text-justify">{isServerReady ? <UploadForm /> : <WaitingForServerToBeReady />}</Container>
+      <Container className="mt-5 text-justify">
+        <span hidden={!serverReady}>
+          <UploadForm />
+        </span>
+        <span hidden={serverReady}>
+          <WaitingForServerToBeReady />
+        </span>
+      </Container>
     </div>
   );
 };
diff --git a/web/src/views/analyze-sleep/upload-form.js b/web/src/views/analyze-sleep/upload-form.js
index 11bf5635..e5bbf648 100644
--- a/web/src/views/analyze-sleep/upload-form.js
+++ b/web/src/views/analyze-sleep/upload-form.js
@@ -1,6 +1,7 @@
 import React from 'react';
 import { Button, Container, CustomInput, Form, FormGroup, Label, Input, InputGroup, Col, Row } from 'reactstrap';
 import { useForm } from 'react-hook-form';
+import { analyzeSleep } from 'requests/analayze-sleep';
 
 const dateFieldSuffix = '-date';
 const timeFieldSuffix = '-time';
@@ -11,7 +12,7 @@ const filterInDateTimeFields = (data) =>
     .map((field) => field.replace(timeFieldSuffix, ''));
 
 const filterOutDateTimeFields = (data) =>
-  Object.entries(data).filter(([fieldName, value]) => !(fieldName.endsWith(dateFieldSuffix) || fieldName.endsWith(timeFieldSuffix)));
+  Object.entries(data).filter(([name, value]) => !(name.endsWith(dateFieldSuffix) || name.endsWith(timeFieldSuffix)));
 
 const mergeDateTimeFields = (data) =>
   filterInDateTimeFields(data).map((fieldPrefix) => [
@@ -21,15 +22,22 @@ const mergeDateTimeFields = (data) =>
         .filter(([fieldName, value]) => fieldName.startsWith(fieldPrefix))
         .map(([fieldName, value]) => value)
         .join(' '),
-    ),
+    ).getTime(),
   ]);
 
+const onSubmit = async (data) => {
+  let formData = Object.fromEntries([...filterOutDateTimeFields(data), ...mergeDateTimeFields(data)]);
+  formData = { ...formData, file: formData.file[0] };
+  try {
+    const results = await analyzeSleep(formData).toPromise();
+    console.log(results);
+  } catch (error) {
+    console.error(error);
+  }
+};
+
 const UploadForm = () => {
   const { register, handleSubmit } = useForm();
-  const onSubmit = (data) => {
-    const newFormData = Object.fromEntries([...filterOutDateTimeFields(data), ...mergeDateTimeFields(data)]);
-    console.log(newFormData);
-  };
 
   return (
     <Container style={{ padding: '2em 0' }}>
@@ -44,8 +52,8 @@ const UploadForm = () => {
               accept=".csv, text/plain"
               bsSize="lg"
               type="file"
-              id="openbci-file"
-              name="openbci-file"
+              id="file"
+              name="file"
               label="Upload an OpenBCI CSV file"
             />
 
@@ -62,18 +70,6 @@ const UploadForm = () => {
               </Row>
             </FormGroup>
 
-            <FormGroup inline>
-              <Label>Name</Label>
-              <Row form>
-                <Col md={6}>
-                  <Input innerRef={register} required type="text" name="firstName" id="firstName" placeholder="First name" />
-                </Col>
-                <Col md={6}>
-                  <Input innerRef={register} required type="text" name="lastName" id="lastName" placeholder="Last name" />
-                </Col>
-              </Row>
-            </FormGroup>
-
             <Row form>
               <Col md={6}>
                 <FormGroup inline>
@@ -85,7 +81,16 @@ const UploadForm = () => {
               <Col md={6}>
                 <FormGroup>
                   <Label for="age">Age</Label>
-                  <Input innerRef={register} required type="number" name="age" id="age" min="0" max="125" placeholder="Enter your age" />
+                  <Input
+                    innerRef={register}
+                    required
+                    type="number"
+                    name="age"
+                    id="age"
+                    min="0"
+                    max="125"
+                    placeholder="Enter your age"
+                  />
                 </FormGroup>
               </Col>
             </Row>
@@ -96,8 +101,20 @@ const UploadForm = () => {
                   <FormGroup>
                     <Label>Time when OpenBCI stream started</Label>
                     <InputGroup>
-                      <Input innerRef={register} required type="date" name={`stream-start${dateFieldSuffix}`} id={`stream-start${dateFieldSuffix}`} />
-                      <Input innerRef={register} required type="time" name={`stream-start${timeFieldSuffix}`} id={`stream-start${timeFieldSuffix}`} />
+                      <Input
+                        innerRef={register}
+                        required
+                        type="date"
+                        name={`stream_start${dateFieldSuffix}`}
+                        id={`stream_start${dateFieldSuffix}`}
+                      />
+                      <Input
+                        innerRef={register}
+                        required
+                        type="time"
+                        name={`stream_start${timeFieldSuffix}`}
+                        id={`stream_start${timeFieldSuffix}`}
+                      />
                     </InputGroup>
                   </FormGroup>
                 </Col>
@@ -105,8 +122,20 @@ const UploadForm = () => {
                   <FormGroup>
                     <Label>I went to bed at</Label>
                     <InputGroup>
-                      <Input innerRef={register} required type="date" name={`bedtime${dateFieldSuffix}`} id={`bedtime${dateFieldSuffix}`} />
-                      <Input innerRef={register} required type="time" name={`bedtime${timeFieldSuffix}`} id={`bedtime${timeFieldSuffix}`} />
+                      <Input
+                        innerRef={register}
+                        required
+                        type="date"
+                        name={`bedtime${dateFieldSuffix}`}
+                        id={`bedtime${dateFieldSuffix}`}
+                      />
+                      <Input
+                        innerRef={register}
+                        required
+                        type="time"
+                        name={`bedtime${timeFieldSuffix}`}
+                        id={`bedtime${timeFieldSuffix}`}
+                      />
                     </InputGroup>
                   </FormGroup>
                 </Col>
@@ -116,8 +145,20 @@ const UploadForm = () => {
                   <FormGroup>
                     <Label>I think I fell asleep at</Label>
                     <InputGroup>
-                      <Input innerRef={register} required type="date" name={`sleeping${dateFieldSuffix}`} id={`sleeping${dateFieldSuffix}`} />
-                      <Input innerRef={register} required type="time" name={`sleeping${timeFieldSuffix}`} id={`sleeping${timeFieldSuffix}`} />
+                      <Input
+                        innerRef={register}
+                        required
+                        type="date"
+                        name={`sleeping${dateFieldSuffix}`}
+                        id={`sleeping${dateFieldSuffix}`}
+                      />
+                      <Input
+                        innerRef={register}
+                        required
+                        type="time"
+                        name={`sleeping${timeFieldSuffix}`}
+                        id={`sleeping${timeFieldSuffix}`}
+                      />
                     </InputGroup>
                   </FormGroup>
                 </Col>
@@ -125,8 +166,20 @@ const UploadForm = () => {
                   <FormGroup>
                     <Label>And woke up at</Label>
                     <InputGroup>
-                      <Input innerRef={register} required type="date" name={`wakeup${dateFieldSuffix}`} id={`wakeup${dateFieldSuffix}`} />
-                      <Input innerRef={register} required type="time" name={`wakeup${timeFieldSuffix}`} id={`wakeup${timeFieldSuffix}`} />
+                      <Input
+                        innerRef={register}
+                        required
+                        type="date"
+                        name={`wakeup${dateFieldSuffix}`}
+                        id={`wakeup${dateFieldSuffix}`}
+                      />
+                      <Input
+                        innerRef={register}
+                        required
+                        type="time"
+                        name={`wakeup${timeFieldSuffix}`}
+                        id={`wakeup${timeFieldSuffix}`}
+                      />
                     </InputGroup>
                   </FormGroup>
                 </Col>
diff --git a/web/yarn.lock b/web/yarn.lock
index 70dd24f0..f4ba9f46 100644
--- a/web/yarn.lock
+++ b/web/yarn.lock
@@ -2202,6 +2202,11 @@ aws4@^1.8.0:
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.10.1.tgz#e1e82e4f3e999e2cfd61b161280d16a111f86428"
   integrity sha512-zg7Hz2k5lI8kb7U32998pRRFin7zJlkfezGJjUc2heaD4Pw2wObakCDVzkKztTm/Ln7eiVvYsjqak0Ed4LkMDA==
 
+axios-observable@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/axios-observable/-/axios-observable-1.1.3.tgz#258055be37e5567c1c03be3860acf15645f658f9"
+  integrity sha512-XY0Q+D6bjiqmyLiXEmg2GXcwMfnbHDMbKNJkkADPOEUlCYsSmpISaZB8s9tZxUSY42S3RTuTHjLiLP6HuVxuRA==
+
 axios@^0.20.0:
   version "0.20.0"
   resolved "https://registry.yarnpkg.com/axios/-/axios-0.20.0.tgz#057ba30f04884694993a8cd07fa394cff11c50bd"
@@ -10048,7 +10053,7 @@ rw@1:
   resolved "https://registry.yarnpkg.com/rw/-/rw-1.3.3.tgz#3f862dfa91ab766b14885ef4d01124bfda074fb4"
   integrity sha1-P4Yt+pGrdmsUiF700BEkv9oHT7Q=
 
-rxjs@^6.5.3, rxjs@^6.6.0:
+rxjs@^6.5.3, rxjs@^6.6.0, rxjs@^6.6.3:
   version "6.6.3"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.6.3.tgz#8ca84635c4daa900c0d3967a6ee7ac60271ee552"
   integrity sha512-trsQc+xYYXZ3urjOiJOuCOa5N3jAZ3eiSpQB5hIT8zGlL2QfnHLJ2r7GMkBGuIausdJN1OneaI6gQlsqNHHmZQ==