diff --git a/ESP32_PrusaConnectCam/Certificate.cpp b/ESP32_PrusaConnectCam/Certificate.cpp
deleted file mode 100644
index f68baff..0000000
--- a/ESP32_PrusaConnectCam/Certificate.cpp
+++ /dev/null
@@ -1,174 +0,0 @@
-/**
-   @file Certificate.cpp
-
-   @brief Here is saved certificate for communication with servers
-
-   @author Miroslav Pivovarsky
-   Contact: miroslav.pivovarsky@gmail.com
-
-   @bug: no know bug
-*/
-
-#include "Certificate.h"
-
-/* 
- echo -n | openssl s_client -servername github.com -connect github.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > github_com.crt 
- echo -n | openssl s_client -servername objects.githubusercontent.com -connect objects.githubusercontent.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > objects_githubusercontent_com.crt 
- echo -n | openssl s_client -servername raw.githubusercontent.com -connect raw.githubusercontent.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > raw_githubusercontent_com.crt 
- echo -n | openssl s_client -servername api.github.com -connect api.github.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > api_github_com.crt
- echo -n | openssl s_client -servername connect.prusa.com -connect connect.prusa.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > connect_prusa_com.crt
-*/
-
-/*
-  Certificates list:
-  - connect.prusa.com certificate
-*/
-const char* root_CAs =
-  "-----BEGIN CERTIFICATE-----\n"
-  "MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw\n"
-  "TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh\n"
-  "cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4\n"
-  "WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu\n"
-  "ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY\n"
-  "MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc\n"
-  "h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+\n"
-  "0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U\n"
-  "A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW\n"
-  "T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH\n"
-  "B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC\n"
-  "B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv\n"
-  "KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn\n"
-  "OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn\n"
-  "jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw\n"
-  "qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI\n"
-  "rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV\n"
-  "HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq\n"
-  "hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL\n"
-  "ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ\n"
-  "3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK\n"
-  "NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5\n"
-  "ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur\n"
-  "TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC\n"
-  "jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc\n"
-  "oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq\n"
-  "4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA\n"
-  "mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d\n"
-  "emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=\n"
-  "-----END CERTIFICATE-----";
-
-/*
-  Certificates list:
-  - github.com certificate
-  - objects.githubusercontent.com certificate
-  - raw.githubusercontent.com certificate
-  - api.github.com certificate
-*/
-const char* root_CAs_ota =
-  " -----BEGIN CERTIFICATE-----\n"
-  "MIIEozCCBEmgAwIBAgIQTij3hrZsGjuULNLEDrdCpTAKBggqhkjOPQQDAjCBjzEL\n"
-  "MAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UE\n"
-  "BxMHU2FsZm9yZDEYMBYGA1UEChMPU2VjdGlnbyBMaW1pdGVkMTcwNQYDVQQDEy5T\n"
-  "ZWN0aWdvIEVDQyBEb21haW4gVmFsaWRhdGlvbiBTZWN1cmUgU2VydmVyIENBMB4X\n"
-  "DTI0MDMwNzAwMDAwMFoXDTI1MDMwNzIzNTk1OVowFTETMBEGA1UEAxMKZ2l0aHVi\n"
-  "LmNvbTBZMBMGByqGSM49AgEGCCqGSM49AwEHA0IABARO/Ho9XdkY1qh9mAgjOUkW\n"
-  "mXTb05jgRulKciMVBuKB3ZHexvCdyoiCRHEMBfFXoZhWkQVMogNLo/lW215X3pGj\n"
-  "ggL+MIIC+jAfBgNVHSMEGDAWgBT2hQo7EYbhBH0Oqgss0u7MZHt7rjAdBgNVHQ4E\n"
-  "FgQUO2g/NDr1RzTK76ZOPZq9Xm56zJ8wDgYDVR0PAQH/BAQDAgeAMAwGA1UdEwEB\n"
-  "/wQCMAAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMEkGA1UdIARCMEAw\n"
-  "NAYLKwYBBAGyMQECAgcwJTAjBggrBgEFBQcCARYXaHR0cHM6Ly9zZWN0aWdvLmNv\n"
-  "bS9DUFMwCAYGZ4EMAQIBMIGEBggrBgEFBQcBAQR4MHYwTwYIKwYBBQUHMAKGQ2h0\n"
-  "dHA6Ly9jcnQuc2VjdGlnby5jb20vU2VjdGlnb0VDQ0RvbWFpblZhbGlkYXRpb25T\n"
-  "ZWN1cmVTZXJ2ZXJDQS5jcnQwIwYIKwYBBQUHMAGGF2h0dHA6Ly9vY3NwLnNlY3Rp\n"
-  "Z28uY29tMIIBgAYKKwYBBAHWeQIEAgSCAXAEggFsAWoAdwDPEVbu1S58r/OHW9lp\n"
-  "LpvpGnFnSrAX7KwB0lt3zsw7CAAAAY4WOvAZAAAEAwBIMEYCIQD7oNz/2oO8VGaW\n"
-  "WrqrsBQBzQH0hRhMLm11oeMpg1fNawIhAKWc0q7Z+mxDVYV/6ov7f/i0H/aAcHSC\n"
-  "Ii/QJcECraOpAHYAouMK5EXvva2bfjjtR2d3U9eCW4SU1yteGyzEuVCkR+cAAAGO\n"
-  "Fjrv+AAABAMARzBFAiEAyupEIVAMk0c8BVVpF0QbisfoEwy5xJQKQOe8EvMU4W8C\n"
-  "IGAIIuzjxBFlHpkqcsa7UZy24y/B6xZnktUw/Ne5q5hCAHcATnWjJ1yaEMM4W2zU\n"
-  "3z9S6x3w4I4bjWnAsfpksWKaOd8AAAGOFjrv9wAABAMASDBGAiEA+8OvQzpgRf31\n"
-  "uLBsCE8ktCUfvsiRT7zWSqeXliA09TUCIQDcB7Xn97aEDMBKXIbdm5KZ9GjvRyoF\n"
-  "9skD5/4GneoMWzAlBgNVHREEHjAcggpnaXRodWIuY29tgg53d3cuZ2l0aHViLmNv\n"
-  "bTAKBggqhkjOPQQDAgNIADBFAiEAru2McPr0eNwcWNuDEY0a/rGzXRfRrm+6XfZe\n"
-  "SzhYZewCIBq4TUEBCgapv7xvAtRKdVdi/b4m36Uyej1ggyJsiesA\n"
-  "-----END CERTIFICATE-----\n"
-  "  -----BEGIN CERTIFICATE-----\n"
-  "MIIHOTCCBiGgAwIBAgIQBj1JF0BNOeUTyz/uzRsuGzANBgkqhkiG9w0BAQsFADBZ\n"
-  "MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMTMwMQYDVQQDEypE\n"
-  "aWdpQ2VydCBHbG9iYWwgRzIgVExTIFJTQSBTSEEyNTYgMjAyMCBDQTEwHhcNMjQw\n"
-  "MzE1MDAwMDAwWhcNMjUwMzE0MjM1OTU5WjBnMQswCQYDVQQGEwJVUzETMBEGA1UE\n"
-  "CBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNU2FuIEZyYW5jaXNjbzEVMBMGA1UEChMM\n"
-  "R2l0SHViLCBJbmMuMRQwEgYDVQQDDAsqLmdpdGh1Yi5pbzCCASIwDQYJKoZIhvcN\n"
-  "AQEBBQADggEPADCCAQoCggEBAK0rFKU6TEGvuLCY3ZOuXlG+3jerD6EP1gc1qe35\n"
-  "g68FqyGuVPOUddYNZiymjYMZxywoNp3qxlbFFBTf9etsayavT+uW+2UMjqCotAdK\n"
-  "KicBEspuExoACFuNgTi7sSUT7A55+k4/+5O+VtpaxQ5dmQk7HxcqvMYx5owBU+fB\n"
-  "wYDD+hXeg3YvxLZNeIlN8OlqWL8w9HbG+3ccegVEjOJQbkrcrW7IQMq2Uk92XjxI\n"
-  "PmMVIvaefqcC1poGYvS4VvEh3x64vJK1hEM4YLMKBaE/hqFtcMozi+H/8JqTCfzP\n"
-  "Qhnu21HIop9rSucxxnZbe9AeHz2LERpUTf3rjgOMg9PB1RUCAwEAAaOCA+0wggPp\n"
-  "MB8GA1UdIwQYMBaAFHSFgMBmx9833s+9KTeqAx2+7c0XMB0GA1UdDgQWBBTob1fr\n"
-  "hlGY65+lvlPa25SsKC777TB7BgNVHREEdDByggsqLmdpdGh1Yi5pb4IJZ2l0aHVi\n"
-  "LmlvghVnaXRodWJ1c2VyY29udGVudC5jb22CDnd3dy5naXRodWIuY29tggwqLmdp\n"
-  "dGh1Yi5jb22CFyouZ2l0aHVidXNlcmNvbnRlbnQuY29tggpnaXRodWIuY29tMD4G\n"
-  "A1UdIAQ3MDUwMwYGZ4EMAQICMCkwJwYIKwYBBQUHAgEWG2h0dHA6Ly93d3cuZGln\n"
-  "aWNlcnQuY29tL0NQUzAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUH\n"
-  "AwEGCCsGAQUFBwMCMIGfBgNVHR8EgZcwgZQwSKBGoESGQmh0dHA6Ly9jcmwzLmRp\n"
-  "Z2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbEcyVExTUlNBU0hBMjU2MjAyMENBMS0x\n"
-  "LmNybDBIoEagRIZCaHR0cDovL2NybDQuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0R2xv\n"
-  "YmFsRzJUTFNSU0FTSEEyNTYyMDIwQ0ExLTEuY3JsMIGHBggrBgEFBQcBAQR7MHkw\n"
-  "JAYIKwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBRBggrBgEFBQcw\n"
-  "AoZFaHR0cDovL2NhY2VydHMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0R2xvYmFsRzJU\n"
-  "TFNSU0FTSEEyNTYyMDIwQ0ExLTEuY3J0MAwGA1UdEwEB/wQCMAAwggF/BgorBgEE\n"
-  "AdZ5AgQCBIIBbwSCAWsBaQB2AE51oydcmhDDOFts1N8/Uusd8OCOG41pwLH6ZLFi\n"
-  "mjnfAAABjkN89oAAAAQDAEcwRQIgU/M527Wcx0KQ3II7kCuG5WMuOHRSxKkf1xAj\n"
-  "JuSkyPACIQCVX0uurcIA2Ug7ipNN2S1ZygukWqJCh7hjIH0XsrXh8QB2AH1ZHhLh\n"
-  "eCp7HGFnfF79+NCHXBSgTpWeuQMv2Q6MLnm4AAABjkN89oEAAAQDAEcwRQIgCxpL\n"
-  "BDak+TWKarrCHlZn4DlqwEfAN3lvlgSo21HQuU8CIQDicrb72c0lA2suMWPWT92P\n"
-  "FLaRvFrFn9HVzI6Vh50YZgB3AObSMWNAd4zBEEEG13G5zsHSQPaWhIb7uocyHf0e\n"
-  "N45QAAABjkN89pQAAAQDAEgwRgIhAPJQX4QArFCjM0sKKzsWLmqmmU8lMhKEYR2T\n"
-  "ges1AQyQAiEA2Y3VhP5RG+dapcbwYgVbrTlgWzO7KE/lg1x11CVcz3QwDQYJKoZI\n"
-  "hvcNAQELBQADggEBAHKlvzObJBxxgyLaUNCEFf37mNFsUtXmaWvkmcfIt9V+TZ7Q\n"
-  "mtvjx5bsd5lqAflp/eqk4+JYpnYcKWrZfM/vMdxPQTeh/VQWewY/hYn6X/V1s2JI\n"
-  "MtjqEkW4aotVdWjHVvsx4rAjz5vtub/wVYgtrU8jusH3TVpT9/0AoFhKE5m2IS7M\n"
-  "Ig7wKR+DDxoNj4fFFluxteVNgbtwuJcb23NkBQqfHXCvQWqxXZZA4Nwl/WoGPoGG\n"
-  "dW5qVOc3BlhtITW53ASyhvKC7HArhj7LwQH8C/dRgn1agIHP9vVJ1NaZnPXhK98T\n"
-  "ohv++OO0E/F/bVGNWVnLBQ4v5PjQzRQUTGvM2mU=\n"
-  "-----END CERTIFICATE-----\n"
-  "-----BEGIN CERTIFICATE-----\n"
-  "MIIDjjCCAnagAwIBAgIQAzrx5qcRqaC7KGSxHQn65TANBgkqhkiG9w0BAQsFADBh\n"
-  "MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3\n"
-  "d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBH\n"
-  "MjAeFw0xMzA4MDExMjAwMDBaFw0zODAxMTUxMjAwMDBaMGExCzAJBgNVBAYTAlVT\n"
-  "MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j\n"
-  "b20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IEcyMIIBIjANBgkqhkiG\n"
-  "9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuzfNNNx7a8myaJCtSnX/RrohCgiN9RlUyfuI\n"
-  "2/Ou8jqJkTx65qsGGmvPrC3oXgkkRLpimn7Wo6h+4FR1IAWsULecYxpsMNzaHxmx\n"
-  "1x7e/dfgy5SDN67sH0NO3Xss0r0upS/kqbitOtSZpLYl6ZtrAGCSYP9PIUkY92eQ\n"
-  "q2EGnI/yuum06ZIya7XzV+hdG82MHauVBJVJ8zUtluNJbd134/tJS7SsVQepj5Wz\n"
-  "tCO7TG1F8PapspUwtP1MVYwnSlcUfIKdzXOS0xZKBgyMUNGPHgm+F6HmIcr9g+UQ\n"
-  "vIOlCsRnKPZzFBQ9RnbDhxSJITRNrw9FDKZJobq7nMWxM4MphQIDAQABo0IwQDAP\n"
-  "BgNVHRMBAf8EBTADAQH/MA4GA1UdDwEB/wQEAwIBhjAdBgNVHQ4EFgQUTiJUIBiV\n"
-  "5uNu5g/6+rkS7QYXjzkwDQYJKoZIhvcNAQELBQADggEBAGBnKJRvDkhj6zHd6mcY\n"
-  "1Yl9PMWLSn/pvtsrF9+wX3N3KjITOYFnQoQj8kVnNeyIv/iPsGEMNKSuIEyExtv4\n"
-  "NeF22d+mQrvHRAiGfzZ0JFrabA0UWTW98kndth/Jsw1HKj2ZL7tcu7XUIOGZX1NG\n"
-  "Fdtom/DzMNU+MeKNhJ7jitralj41E6Vf8PlwUHBHQRFXGU7Aj64GxJUTFy8bJZ91\n"
-  "8rGOmaFvE7FBcf6IKshPECBV1/MUReXgRPTqh5Uykw7+U0b6LJ3/iyK5S9kJRaTe\n"
-  "pLiaWN0bfVKfjllDiIGknibVb63dDcY3fe0Dkhvld1927jyNxF1WW6LZZm6zNTfl\n"
-  "MrY=\n"
-  "-----END CERTIFICATE-----\n"
-  "-----BEGIN CERTIFICATE-----\n"
-  "MIICjzCCAhWgAwIBAgIQXIuZxVqUxdJxVt7NiYDMJjAKBggqhkjOPQQDAzCBiDEL\n"
-  "MAkGA1UEBhMCVVMxEzARBgNVBAgTCk5ldyBKZXJzZXkxFDASBgNVBAcTC0plcnNl\n"
-  "eSBDaXR5MR4wHAYDVQQKExVUaGUgVVNFUlRSVVNUIE5ldHdvcmsxLjAsBgNVBAMT\n"
-  "JVVTRVJUcnVzdCBFQ0MgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMTAwMjAx\n"
-  "MDAwMDAwWhcNMzgwMTE4MjM1OTU5WjCBiDELMAkGA1UEBhMCVVMxEzARBgNVBAgT\n"
-  "Ck5ldyBKZXJzZXkxFDASBgNVBAcTC0plcnNleSBDaXR5MR4wHAYDVQQKExVUaGUg\n"
-  "VVNFUlRSVVNUIE5ldHdvcmsxLjAsBgNVBAMTJVVTRVJUcnVzdCBFQ0MgQ2VydGlm\n"
-  "aWNhdGlvbiBBdXRob3JpdHkwdjAQBgcqhkjOPQIBBgUrgQQAIgNiAAQarFRaqflo\n"
-  "I+d61SRvU8Za2EurxtW20eZzca7dnNYMYf3boIkDuAUU7FfO7l0/4iGzzvfUinng\n"
-  "o4N+LZfQYcTxmdwlkWOrfzCjtHDix6EznPO/LlxTsV+zfTJ/ijTjeXmjQjBAMB0G\n"
-  "A1UdDgQWBBQ64QmG1M8ZwpZ2dEl23OA1xmNjmjAOBgNVHQ8BAf8EBAMCAQYwDwYD\n"
-  "VR0TAQH/BAUwAwEB/zAKBggqhkjOPQQDAwNoADBlAjA2Z6EWCNzklwBBHU6+4WMB\n"
-  "zzuqQhFkoJ2UOQIReVx7Hfpkue4WQrO/isIJxOzksU0CMQDpKmFHjFJKS04YcPbW\n"
-  "RNZu9YO6bVi9JNlWSOrvxKJGgYhqOkbRqZtNyWHa0V1Xahg=\n"
-  "-----END CERTIFICATE-----";
-
-/* EOF */
\ No newline at end of file
diff --git a/ESP32_PrusaConnectCam/Certificate.h b/ESP32_PrusaConnectCam/Certificate.h
index 80af7b1..125755a 100644
--- a/ESP32_PrusaConnectCam/Certificate.h
+++ b/ESP32_PrusaConnectCam/Certificate.h
@@ -12,8 +12,47 @@
 #ifndef _CERTIFICATE_H_
 #define _CERTIFICATE_H_
 
-extern const char* root_CAs;            ///< root certificate for communication with prusa servers
-extern const char* root_CAs_ota;       ///< root certificate for communication with servers
+/* 
+ echo -n | openssl s_client -servername connect.prusa.com -connect connect.prusa.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > connect_prusa_com.crt
+*/
+
+/*
+  Certificates list:
+  - connect.prusa.com certificate
+*/
+const char root_CAs[] PROGMEM = R"rawliteral(
+-----BEGIN CERTIFICATE-----
+MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw
+TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
+cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4
+WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu
+ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY
+MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc
+h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+
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+emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=
+-----END CERTIFICATE-----
+)rawliteral";
 
 #endif
 
diff --git a/ESP32_PrusaConnectCam/Certificate_ota.h b/ESP32_PrusaConnectCam/Certificate_ota.h
new file mode 100644
index 0000000..377f862
--- /dev/null
+++ b/ESP32_PrusaConnectCam/Certificate_ota.h
@@ -0,0 +1,140 @@
+/**
+   @file Certificate_ota.h
+
+   @brief Here is saved certificate for communication with servers for OTA update
+
+   @author Miroslav Pivovarsky
+   Contact: miroslav.pivovarsky@gmail.com
+
+   @bug: no know bug
+*/
+
+#ifndef _CERTIFICATE_OTA_H_
+#define _CERTIFICATE_OTA_H_
+
+/* 
+ echo -n | openssl s_client -servername github.com -connect github.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > github_com.crt 
+ echo -n | openssl s_client -servername objects.githubusercontent.com -connect objects.githubusercontent.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > objects_githubusercontent_com.crt 
+ echo -n | openssl s_client -servername raw.githubusercontent.com -connect raw.githubusercontent.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > raw_githubusercontent_com.crt 
+ echo -n | openssl s_client -servername api.github.com -connect api.github.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > api_github_com.crt
+*/
+
+/*
+  Certificates list:
+  - github.com certificate
+  - objects.githubusercontent.com certificate
+  - raw.githubusercontent.com certificate
+  - api.github.com certificate
+*/
+const char root_CAs_ota[] PROGMEM =  R"rawliteral(
+-----BEGIN CERTIFICATE-----
+MIIEozCCBEmgAwIBAgIQTij3hrZsGjuULNLEDrdCpTAKBggqhkjOPQQDAjCBjzEL
+MAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UE
+BxMHU2FsZm9yZDEYMBYGA1UEChMPU2VjdGlnbyBMaW1pdGVkMTcwNQYDVQQDEy5T
+ZWN0aWdvIEVDQyBEb21haW4gVmFsaWRhdGlvbiBTZWN1cmUgU2VydmVyIENBMB4X
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+ggL+MIIC+jAfBgNVHSMEGDAWgBT2hQo7EYbhBH0Oqgss0u7MZHt7rjAdBgNVHQ4E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+-----END CERTIFICATE-----
+  -----BEGIN CERTIFICATE-----
+MIIHOTCCBiGgAwIBAgIQBj1JF0BNOeUTyz/uzRsuGzANBgkqhkiG9w0BAQsFADBZ
+MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMTMwMQYDVQQDEypE
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+R2l0SHViLCBJbmMuMRQwEgYDVQQDDAsqLmdpdGh1Yi5pbzCCASIwDQYJKoZIhvcN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+A1UdIAQ3MDUwMwYGZ4EMAQICMCkwJwYIKwYBBQUHAgEWG2h0dHA6Ly93d3cuZGln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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+  )rawliteral";
+
+#endif
+
+/* EOF */
diff --git a/ESP32_PrusaConnectCam/WebPage.h b/ESP32_PrusaConnectCam/WebPage.h
index 5988dc0..4a842b5 100644
--- a/ESP32_PrusaConnectCam/WebPage.h
+++ b/ESP32_PrusaConnectCam/WebPage.h
@@ -54,7 +54,6 @@ const char index_html[] PROGMEM = R"rawliteral(
     <img src="esp32_cam.svg" id=logo alt="Logo image" style="margin-left: 10px;" />
       <ul class="top_bar" style="justify-content:flex-start;">
         <li><a class=p5 href="https://forum.prusa3d.com/forum/prusa-connect-prusalink" id="forum-link">Forum</a></li>
-        <li><a class=p5 href="https://help.prusa3d.com" id="help-link">Help</a></li>
       </ul>
       <ul class="top_bar" style="justify-content:flex-end;">
 		<li><a class=p4 href="#" onclick="javascript:actionButton('/action_led',true,'')"><div id="light-icon"></div> Light </a></li>
@@ -110,7 +109,6 @@ const char index_html[] PROGMEM = R"rawliteral(
 	sliderCheck();
 	get_data();
 	addClickListener('github-link');
-	addClickListener('help-link');
 	addClickListener('forum-link');
 </script>
 </html>
diff --git a/ESP32_PrusaConnectCam/camera.cpp b/ESP32_PrusaConnectCam/camera.cpp
index e11549c..764666b 100644
--- a/ESP32_PrusaConnectCam/camera.cpp
+++ b/ESP32_PrusaConnectCam/camera.cpp
@@ -455,6 +455,30 @@ void Camera::CopyPhoto(String* i_data) {
   *i_data = Photo;
 }
 
+/**
+ * @brief Copy photo from frame buffer to string array with range
+ * 
+ * @param i_data - pointer to string 
+ * @param i_from - start index
+ * @param i_to - end index
+ */
+void Camera::CopyPhoto(String* i_data, int i_from, int i_to) {
+  Photo = "";
+  for (size_t i = i_from; i < i_to; i++) {
+    Photo += (char)FrameBuffer->buf[i];
+  }
+  *i_data = Photo;
+}
+
+/**
+ * @brief Get Photo Size
+ * 
+ * @return int - photo size
+ */
+int Camera::GetPhotoSize() {
+  return FrameBuffer->len;
+}
+
 /**
    @brief Set Photo Quality
    @param uint8_t - photo quality
diff --git a/ESP32_PrusaConnectCam/camera.h b/ESP32_PrusaConnectCam/camera.h
index e8efb97..938ee25 100644
--- a/ESP32_PrusaConnectCam/camera.h
+++ b/ESP32_PrusaConnectCam/camera.h
@@ -87,6 +87,8 @@ public:
   
   void CopyPhoto(camera_fb_t *);
   void CopyPhoto(String*);
+  void CopyPhoto(String*, int, int);
+  int GetPhotoSize();
   String GetPhoto();
   camera_fb_t *GetPhotoFb();
   framesize_t TransformFrameSizeDataType(uint8_t);
diff --git a/ESP32_PrusaConnectCam/connect.cpp b/ESP32_PrusaConnectCam/connect.cpp
index 8a20dd8..4d1f466 100644
--- a/ESP32_PrusaConnectCam/connect.cpp
+++ b/ESP32_PrusaConnectCam/connect.cpp
@@ -74,7 +74,7 @@ void PrusaConnect::TakePicture() {
  * @return true - if data was sent successfully
  * @return false - if data was not sent successfully
  */
-bool PrusaConnect::SendDataToBackend(String *i_data, String i_content_type, String i_type, String i_url_path, bool i_fragmentation) { 
+bool PrusaConnect::SendDataToBackend(String *i_data, int i_data_length, String i_content_type, String i_type, String i_url_path, SendDataToBackendType i_data_type) { 
   WiFiClientSecure client;
   Server_pause();
   BackendReceivedStatus = "";
@@ -112,24 +112,37 @@ bool PrusaConnect::SendDataToBackend(String *i_data, String i_content_type, Stri
       client.println("fingerprint: " + Fingerprint);
       client.println("token: " + Token);
       client.print("Content-Length: ");
-      client.println(i_data->length());
+      client.println(i_data_length);
       client.println();
 
       esp_task_wdt_reset();
-      if (true == i_fragmentation) {
-        log->AddEvent(LogLevel_Verbose, "Send data fragmented");
-        for (int index = 0; index < i_data->length(); index = index + PHOTO_FRAGMENT_SIZE) {
-          client.print(i_data->substring(index, index + PHOTO_FRAGMENT_SIZE));
-          log->AddEvent(LogLevel_Verbose, String(index));
+      if (SendPhoto == i_data_type) {
+        log->AddEvent(LogLevel_Verbose, "Send data photo");
+        int index;
+        /* send data in fragments */
+        for (index = 0; index < i_data_length; index = index + PHOTO_FRAGMENT_SIZE) {
+          camera->CopyPhoto(i_data, index, index + PHOTO_FRAGMENT_SIZE);
+          client.print(*i_data);
+          log->AddEvent(LogLevel_Verbose, String(i_data_length) + "/" + String(index));
         }
-      } else {
-        log->AddEvent(LogLevel_Verbose, "Send data");
+
+        /* send rest of data */
+        index -= PHOTO_FRAGMENT_SIZE;
+        if((i_data_length > index) && ((i_data_length - index) > 0)) {
+          camera->CopyPhoto(i_data, index, i_data_length);
+          client.print(*i_data);
+          log->AddEvent(LogLevel_Verbose, String(i_data_length) + "/" + String(i_data_length));
+        }
+
+      } else if (SendInfo == i_data_type) {
+        log->AddEvent(LogLevel_Verbose, "Send data info");
         client.print(*i_data);
       }
 
-      log->AddEvent(LogLevel_Info, "Send done");
+      log->AddEvent(LogLevel_Info, "Send done: " + String(i_data_length) + " bytes");
       esp_task_wdt_reset();
 
+      /* read response from server */
       String response = "";
       String fullResponse = "";
       log->AddEvent(LogLevel_Verbose, "Response:");
@@ -181,8 +194,8 @@ bool PrusaConnect::SendDataToBackend(String *i_data, String i_content_type, Stri
  */
 void PrusaConnect::SendPhotoToBackend() {
   log->AddEvent(LogLevel_Info, "Start sending photo to prusaconnect");
-  camera->CopyPhoto(&Photo);
-  SendDataToBackend(&Photo, "image/jpg", "Photo", HOST_URL_CAM_PATH, true);
+  SendDataToBackend(&Photo, camera->GetPhotoSize(), "image/jpg", "Photo", HOST_URL_CAM_PATH, SendPhoto);
+  SystemLog.AddEvent(LogLevel_Info, "Free RAM: " + String(ESP.getFreeHeap()) + " bytes");
 }
 
 /**
@@ -213,7 +226,7 @@ void PrusaConnect::SendInfoToBackend() {
 
     serializeJson(json_data, json_string);
     log->AddEvent(LogLevel_Info, "Data: " + json_string);
-    bool response = SendDataToBackend(&json_string, "application/json", "Info", HOST_URL_INFO_PATH, false);
+    bool response = SendDataToBackend(&json_string, json_string.length(), "application/json", "Info", HOST_URL_INFO_PATH, SendInfo);
 
     if (true == response) {
       SendDeviceInformationToBackend = false;
diff --git a/ESP32_PrusaConnectCam/connect.h b/ESP32_PrusaConnectCam/connect.h
index 4de2c5c..8cd7312 100644
--- a/ESP32_PrusaConnectCam/connect.h
+++ b/ESP32_PrusaConnectCam/connect.h
@@ -37,6 +37,15 @@ enum BackendAvailabilitStatus {
   BackendUnavailable = 2,         ///< backend is unavailable
 };
 
+/**
+ * @brief SendDataToBackendType enum
+ * type of data to send to backend
+ */
+enum SendDataToBackendType {
+  SendPhoto = 0,                  ///< send photo to backend
+  SendInfo = 1,                   ///< send device information to backend
+};
+
 class PrusaConnect {
 private:
   uint8_t RefreshInterval;                        ///< interval for sending photo to backend
@@ -54,7 +63,7 @@ private:
   Logs *log;                                      ///< pointer to logs object
   Camera *camera;                                 ///< pointer to camera object
 
-  bool SendDataToBackend(String *, String, String, String, bool);
+  bool SendDataToBackend(String *,int, String, String, String, SendDataToBackendType);
 
 public:
   PrusaConnect(Configuration*, Logs*, Camera*);
diff --git a/ESP32_PrusaConnectCam/mcu_cfg.h b/ESP32_PrusaConnectCam/mcu_cfg.h
index 00d657a..53a8626 100644
--- a/ESP32_PrusaConnectCam/mcu_cfg.h
+++ b/ESP32_PrusaConnectCam/mcu_cfg.h
@@ -14,7 +14,7 @@
 #define _MCU_CFG_H_
 
 /* ---------------- BASIC MCU CFG  --------------*/
-#define SW_VERSION                  "1.0.0"                 ///< SW version
+#define SW_VERSION                  "1.0.1"                 ///< SW version
 #define SW_BUILD                    __DATE__ " " __TIME__   ///< build number
 #define CONSOLE_VERBOSE_DEBUG       false                   ///< enable/disable verbose debug log level for console
 #define DEVICE_HOSTNAME             "Prusa-ESP32cam"        ///< device hostname
diff --git a/ESP32_PrusaConnectCam/system.cpp b/ESP32_PrusaConnectCam/system.cpp
index 306d50f..bccb5c7 100644
--- a/ESP32_PrusaConnectCam/system.cpp
+++ b/ESP32_PrusaConnectCam/system.cpp
@@ -118,6 +118,7 @@ void System_CheckNewVersion() {
     FirmwareUpdate.CheckNewVersionAfterBoot = true;
     WiFiClientSecure client;
     client.setCACert(root_CAs_ota);
+    //client.setInsecure();
     FirmwareUpdate.CheckNewVersionFwStatus = "N/A";
     FirmwareUpdate.NewVersionFw = "Unknown";
     FirmwareUpdate.OtaUpdateFwUrl = "";
diff --git a/ESP32_PrusaConnectCam/system.h b/ESP32_PrusaConnectCam/system.h
index dc359c5..7b5130d 100644
--- a/ESP32_PrusaConnectCam/system.h
+++ b/ESP32_PrusaConnectCam/system.h
@@ -27,7 +27,7 @@
 #include "var.h"
 #include "cfg.h"
 #include "log.h"
-#include "Certificate.h"
+#include "Certificate_ota.h"
 #include "wifi_mngt.h"
 #include "connect.h"
 #include "serial_cfg.h"
diff --git a/webpage/index.html b/webpage/index.html
index 9127b2e..92023bb 100644
--- a/webpage/index.html
+++ b/webpage/index.html
@@ -28,7 +28,6 @@
     <img src="esp32_cam.svg" id=logo alt="Logo image" style="margin-left: 10px;" />
       <ul class="top_bar" style="justify-content:flex-start;">
         <li><a class=p5 href="https://forum.prusa3d.com/forum/prusa-connect-prusalink" id="forum-link">Forum</a></li>
-        <li><a class=p5 href="https://help.prusa3d.com" id="help-link">Help</a></li>
       </ul>
       <ul class="top_bar" style="justify-content:flex-end;">
 		<li><a class=p4 href="#" onclick="javascript:actionButton('/action_led',true,'')"><div id="light-icon"></div> Light </a></li>
@@ -84,7 +83,6 @@
 	sliderCheck();
 	get_data();
 	addClickListener('github-link');
-	addClickListener('help-link');
 	addClickListener('forum-link');
 </script>
 </html>
\ No newline at end of file