Update README.md

README.md

@@ -1,5 +1,5 @@
 # Beat Bracelet
-![](https://lh3.googleusercontent.com/5GtG0xIfpFIlJCm2MsdGa1MYo2sihoaa9xkutDN5pMkCv0HyEZAD0QMdgh8jO9rj_J_K9MDCPkknuP7h5h72SCQXxH2XqURZ8BA2UVLW3YH6w2c-n3dmtHLOLUmv_ZWlNyirdxSItkSnKLUc-zRyiksqeNdWDqeLbZJFbtVAKYhn1o6tY4evTHPojIjggmcGOfGUVA4dvFAc6LvvkxS19FjqaX17cIOktEbGsb_ra0YNRmEuGz9BvJLv8KE4mKKmwZqBQt8yoONcmKE_tUsN2zN-1Q__pJ9D3wdNFi8pBpgBDzszORsr7p6KejFZrpe1N1CBdiZ7mCshDqmMvyvoAGFx0-EEJSa30jrqJCG5rafDRW5-i9z1mqA9mic7XwjW7DFPjITTuYnsoWqJLMV_9fto8I1swi0YtdhI7TuI_0o8096ZP7MlncgxBXH2BQdJQjExr5su3tvWc_9v8saPjZdPTyvI5zrcIx_5hGb3KPLGZ-pe54o74jZPnJAtWaHy6pegwoAWpxFEmxVwZ3xA0rARhfNz4Y9MGoOMjT_vZm2jT2LNSvZ76_hCnyitVjDHKLX-_yisUyDO6HRl4qHZeHfFPJd3GEYZnfnCElkQKAqa_k8-bNQTNW0RfU6teDH05pjftm3fFQhBGd_-TtnXdA9tZbpTnpJWiMNaxaUaxynbbXSuJppv9KMzvJFD=w503-h403-no?authuser=0)
+![](https://github.com/ferru97/beat-bracelet/blob/master/img/prev.png?raw=true)
 
 Beat Bracelet is an indoor, wifi connected smart bracelet useful to keep track of the health state of a person.
 
@@ -20,7 +20,7 @@ However, this is not always possible if there is no one at home who can help the
 
 
 ## Technologies
-![](https://lh3.googleusercontent.com/eDReuFOIi2Z6bIKryhM4WrnoUPz6BqaDUgkDyzksobGorEWsAupqfvNWTWIG10PXc2nsrpCesefnpCLTI26VAh38p9-IvZ0sA6QGCfloY3RcNkJcmn-Lx_bTIFURwwPlHwluKpX60M3BBzm-z2RAam2efNJgfRnteWDFbCNGIzJdctrLIhnKjZE8dvUMCpmQ19-XKKLCz4elYTA8SuVQRfe46Y_IAQ6KBYjabskLEeXNM2EDlUjkiqWSa6-zVM390W_NYAeIWSLV4fkA32PYIiEzmC6Oq3GcEVrDglVcpFav7Nhe4TII3RVnbVZZISjz8uSqbCVQNaLr-JmU4Hpeei_cOFedveAPwQCn0fY1GPJoFalrclrdyVc6-wadN8yBkJx2uIqXYBvU0Y0oJOLENPd9X_3o7Lec0U-uJbdvjXEN4LUH57PoeiKyG-se25tSMGcDdXshJYY3vOD1lZFzJwRKSnzA0bppuKsUU81SXTrW5FCNazV4czIqaxEMRmOVauRstkkWVVvwHirtLZP9c-2e9o_DYNkfrPXWicQup3YdFT7FSUk5t6snXEw7PRUGZu_xJijIR6Bqp9mTKD_VhWKFn8nH0VrFeJzoRU7Nwo5ImezQGH_zVBQnSSfDgmtbenT0RiZqU66_LcXUJpflc5PZotM_SNdwfdXshjVNh9Ax8Mt3Ri8RY_AO_tal=w1740-h262-no?authuser=0)
+![](https://github.com/ferru97/beat-bracelet/blob/master/img/tech.png?raw=true)
 
 - ESP8266-12F: the main core of the bracelet
 - MQTT: bracelet-to-server & bracelet-to-app communication
@@ -29,7 +29,7 @@ However, this is not always possible if there is no one at home who can help the
 - Android Studio: development of the android application
 
 ## System Architecture
-![](https://lh3.googleusercontent.com/njLDT3X9jS5649AqHNC6kBE1L4lH0HNQeFemS5CSYOdv0td5NmhDYkCU-kcriyI6-ax9uQ3H__ThplFBYzgYb-cSKtL9N1oV5H3D5OwJwbBy8EuqncMUCaYEJT5cd4oWHyezllHMqMzgib_qG-5nZhIDq6aZtPDGNXCOqpYkhJZk9oV0iag1y_jJj65WnD3E1nVghG-zqBg9EC_iIDWEeIzVQy6uTPDFYfEcKko36f-MhJcaWDH2ovC_WtqC1SfaZHKt-6NiBaZJZBVnOVhUjC6k3TXSQYJM6gQJJPVCdt56SMQJVJCtFxSpEOTtEr1CCf8275xFwenWy7I3rY4KaTgThN-f6lY-xpHtfmZOT5tpYvnpjzwVaa9YpDCLrn5Dle13w2H9VIBHmwcKHY3NjJKwGv28riT72lFbLEvBUh212onCxVZOySlT8oe7wFqCC_Sj9GV6D64jwoWbvfebM64i77EpTLbfGkF8dscRcIw7tjLcKempil9G0lOxWAkZ1J6uNJKjsSVV-faade8t0qf4Q2S8xZyK4KEa5LwZjjR34IBftTX3z-I5z6g98SBqi0_m0Njb5pHwJP4XHuyIpAT2dBd54qa-ngZBEZJgiMZATsZPHh3p-SkU4p-FzXnifErd2NA03b3f7rxbl9NWWTGo58Nm7mZBvNxQ80S4cG71LVDxQAtwY7od6o63=w857-h888-no?authuser=0)
+![](https://github.com/ferru97/beat-bracelet/blob/master/img/arc.png?raw=true)
 
 The smart bracelets communicate with the **MQTT server** to publish new heart rate measurements, send alerts and get operational parameters.
 
@@ -38,7 +38,7 @@ The users mobile application interacts with the** MQTT server** to get real-time
 The measurements values, alert events and user application data are stored on a **MongoDB database**.
 
 ## Prototype
-![](https://lh3.googleusercontent.com/xkwJ7gwDXGIJbXbSefj5gI_e8mCcOFWwLpcteELtsvK_dpsmHESYXz98oY_M1zu-AETaJAr-I2Z7x2ZUmpPfzmK5QlBNIKng4UE-Vd6NQyyjkj497HwSJJAzHD9Rz31l1xAxrkPOsxbJIKqnT66hpJITd_8ioCEnGwFpZZdX_UC4pt4P8jTwBF6yvas6Njf9M-BW-YYZq2bR6oD6Hksh69OgeQr5XXmUF3HebsKg7ZpUCsPzsyFTu15PRrSFE4yYiEPtPuLq0RmxoxcWAXAPPDpBvO9QKfIrq6PJ2ffkyiuJZnFeYj0MK7DqCfOaWX3anbAO8aHA-QUOW8IeVtyTN4Kka2RcIOqzWzdmIaP60APceub7pNTu60sfueaOBgg1FKgUhjv21pteO9BG3LXzDexVLDO7hJLfdqMI-qRYHdS4qNYlqpHoV0rOs71mepnlxESRYTWzodaWB6I6EDQGNRhL6K66VgTqjGp4PscXM31zEvzOwTDLW3lnczxNLOM232y17XHri6NKInEGfRftcCE_okO4ew2N5hhNLePcFHiUQl-9Zwd2s1XOVApzgoZd1R8iJMWHKWjnalt0W4Gg2wECCWAWkIxhKnemwhjUuariIexf79jKlhYxejb0VG2aupXY4HdUwNyWY9PAZHJMmPb5lWslqBGs4PKY227u-hPL8oTq_WjOVNfnXAsk=w1772-h766-no?authuser=0)
+![](https://github.com/ferru97/beat-bracelet/blob/master/img/proto.png?raw=true)
 
 
 #### Directories organization