diff --git a/uiot/certs/ca.c b/uiot/certs/ca.c
index 01c4a28..9c556ab 100644
--- a/uiot/certs/ca.c
+++ b/uiot/certs/ca.c
@@ -51,65 +51,27 @@ static const char *iot_ca_crt = \
 static const char *iot_https_ca_crt = \
 {
     "-----BEGIN CERTIFICATE-----\r\n"
-    "MIIFlTCCBH2gAwIBAgIQDaPkQo/2q3qn5J5qQPDu0jANBgkqhkiG9w0BAQsFADBy\r\n"
-    "MQswCQYDVQQGEwJDTjElMCMGA1UEChMcVHJ1c3RBc2lhIFRlY2hub2xvZ2llcywg\r\n"
-    "SW5jLjEdMBsGA1UECxMURG9tYWluIFZhbGlkYXRlZCBTU0wxHTAbBgNVBAMTFFRy\r\n"
-    "dXN0QXNpYSBUTFMgUlNBIENBMB4XDTE4MDgyMTAwMDAwMFoXDTE5MTExOTEyMDAw\r\n"
-    "MFowHzEdMBsGA1UEAwwUKi5jbi1zaDIudWZpbGVvcy5jb20wggEiMA0GCSqGSIb3\r\n"
-    "DQEBAQUAA4IBDwAwggEKAoIBAQCag2wjy4p9TmCn+4ctlNW4nAfRoiOGvlplH6qy\r\n"
-    "fol68e9zPFdocAbi6lKfOtUdDPJ0TBhrefwFvK/oUr/wWUmCBoQdjmeFlKc5cidU\r\n"
-    "h186OrXdDgh5n28tsgDMkUuniKXsvD46Z5ibGKmjgQufTvOrvZprOI2zGpYvLKb+\r\n"
-    "naxSNAiL3Nc5+jqFTVEKdzooYMNEn3dz0QIkVafWjK6sW6Q0poBzRcIQzyCkkqUA\r\n"
-    "0hp5w6kGFqg/W3QyNAXpdcpWwSfEhZr8e4e+v4mkYmm0LyS5p5WEsiAYPizdRFD3\r\n"
-    "3llpF2S0NcNAV2jMobnu5TaoniRH9CbRgHFlHTtmn+QI5AWxAgMBAAGjggJ4MIIC\r\n"
-    "dDAfBgNVHSMEGDAWgBR/05nzoEcOMQBWViKOt8ye3coBijAdBgNVHQ4EFgQU0Bcs\r\n"
-    "CP1fX/9fw1pf+794ru6m0VkwHwYDVR0RBBgwFoIUKi5jbi1zaDIudWZpbGVvcy5j\r\n"
-    "b20wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcD\r\n"
-    "AjBMBgNVHSAERTBDMDcGCWCGSAGG/WwBAjAqMCgGCCsGAQUFBwIBFhxodHRwczov\r\n"
-    "L3d3dy5kaWdpY2VydC5jb20vQ1BTMAgGBmeBDAECATCBgQYIKwYBBQUHAQEEdTBz\r\n"
-    "MCUGCCsGAQUFBzABhhlodHRwOi8vb2NzcDIuZGlnaWNlcnQuY29tMEoGCCsGAQUF\r\n"
-    "BzAChj5odHRwOi8vY2FjZXJ0cy5kaWdpdGFsY2VydHZhbGlkYXRpb24uY29tL1Ry\r\n"
-    "dXN0QXNpYVRMU1JTQUNBLmNydDAJBgNVHRMEAjAAMIIBAwYKKwYBBAHWeQIEAgSB\r\n"
-    "9ASB8QDvAHYApLkJkLQYWBSHuxOizGdwCjw1mAT5G9+443fNDsgN3BAAAAFlWoEO\r\n"
-    "fQAABAMARzBFAiEA0jMXM/NgCK3+ftZGN601WUrksHceAjmgXtBPj3dKmSECIFHU\r\n"
-    "+LRLgezuroBPOI1f+qku68Zl6+l896PXF/G+KqMEAHUAh3W/51l8+IxDmV+9827/\r\n"
-    "Vo1HVjb/SrVgwbTq/16ggw8AAAFlWoEPSwAABAMARjBEAiAEHMUqOh3eCHsTDcNZ\r\n"
-    "iDTbNtVYcGMEqlAe0AAjh4OFpAIgFoWqCuPEy+RCXIAgEn8qJsqZLxw+9YQIEmbF\r\n"
-    "5NzjDikwDQYJKoZIhvcNAQELBQADggEBABzhM36Bqia/CfTxe8pK8Rto1imTQaML\r\n"
-    "AJ/Rkr2jO21ieOZ0myixtzsu4COWFssk25OTbUPVhoHJgIatsic86BWBVGZ6K2pU\r\n"
-    "ZtEmMvYEYotjSLMlRmDGnwECLz19A6wYXEBZLIjoA1yrUwvGTPlgJrsOrjIxBhNc\r\n"
-    "CPT4/TIgUssBrLCXrl22I2KXVX9HdZR7xRdCx6KcLFwt9+xyIdVDUqaPOPi7BqBg\r\n"
-    "vqr78XRvgk5cc6lqn8Ssg7hF7RvZV5wlHuswFzJgyjgXD+T8jc22sqaMyzAjyGWs\r\n"
-    "teKjO3mGVDRPHd5S+FRksQx97atAFBlRWc8S+njWgCbbrTorujV6Sxk=\r\n"
-    "-----END CERTIFICATE-----\r\n"
-    "-----BEGIN CERTIFICATE-----\r\n"
-    "MIIErjCCA5agAwIBAgIQBYAmfwbylVM0jhwYWl7uLjANBgkqhkiG9w0BAQsFADBh\r\n"
+    "MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh\r\n"
     "MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3\r\n"
     "d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD\r\n"
-    "QTAeFw0xNzEyMDgxMjI4MjZaFw0yNzEyMDgxMjI4MjZaMHIxCzAJBgNVBAYTAkNO\r\n"
-    "MSUwIwYDVQQKExxUcnVzdEFzaWEgVGVjaG5vbG9naWVzLCBJbmMuMR0wGwYDVQQL\r\n"
-    "ExREb21haW4gVmFsaWRhdGVkIFNTTDEdMBsGA1UEAxMUVHJ1c3RBc2lhIFRMUyBS\r\n"
-    "U0EgQ0EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCgWa9X+ph+wAm8\r\n"
-    "Yh1Fk1MjKbQ5QwBOOKVaZR/OfCh+F6f93u7vZHGcUU/lvVGgUQnbzJhR1UV2epJa\r\n"
-    "e+m7cxnXIKdD0/VS9btAgwJszGFvwoqXeaCqFoP71wPmXjjUwLT70+qvX4hdyYfO\r\n"
-    "JcjeTz5QKtg8zQwxaK9x4JT9CoOmoVdVhEBAiD3DwR5fFgOHDwwGxdJWVBvktnoA\r\n"
-    "zjdTLXDdbSVC5jZ0u8oq9BiTDv7jAlsB5F8aZgvSZDOQeFrwaOTbKWSEInEhnchK\r\n"
-    "ZTD1dz6aBlk1xGEI5PZWAnVAba/ofH33ktymaTDsE6xRDnW97pDkimCRak6CEbfe\r\n"
-    "3dXw6OV5AgMBAAGjggFPMIIBSzAdBgNVHQ4EFgQUf9OZ86BHDjEAVlYijrfMnt3K\r\n"
-    "AYowHwYDVR0jBBgwFoAUA95QNVbRTLtm8KPiGxvDl7I90VUwDgYDVR0PAQH/BAQD\r\n"
-    "AgGGMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjASBgNVHRMBAf8ECDAG\r\n"
-    "AQH/AgEAMDQGCCsGAQUFBwEBBCgwJjAkBggrBgEFBQcwAYYYaHR0cDovL29jc3Au\r\n"
-    "ZGlnaWNlcnQuY29tMEIGA1UdHwQ7MDkwN6A1oDOGMWh0dHA6Ly9jcmwzLmRpZ2lj\r\n"
-    "ZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RDQS5jcmwwTAYDVR0gBEUwQzA3Bglg\r\n"
-    "hkgBhv1sAQIwKjAoBggrBgEFBQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29t\r\n"
-    "L0NQUzAIBgZngQwBAgEwDQYJKoZIhvcNAQELBQADggEBAK3dVOj5dlv4MzK2i233\r\n"
-    "lDYvyJ3slFY2X2HKTYGte8nbK6i5/fsDImMYihAkp6VaNY/en8WZ5qcrQPVLuJrJ\r\n"
-    "DSXT04NnMeZOQDUoj/NHAmdfCBB/h1bZ5OGK6Sf1h5Yx/5wR4f3TUoPgGlnU7EuP\r\n"
-    "ISLNdMRiDrXntcImDAiRvkh5GJuH4YCVE6XEntqaNIgGkRwxKSgnU3Id3iuFbW9F\r\n"
-    "UQ9Qqtb1GX91AJ7i4153TikGgYCdwYkBURD8gSVe8OAco6IfZOYt/TEwii1Ivi1C\r\n"
-    "qnuUlWpsF1LdQNIdfbW3TSe0BhQa7ifbVIfvPWHYOu3rkg1ZeMo6XRU9B4n5VyJY\r\n"
-    "RmE=\r\n"
-    "-----END CERTIFICATE-----"
+    "QTAeFw0wNjExMTAwMDAwMDBaFw0zMTExMTAwMDAwMDBaMGExCzAJBgNVBAYTAlVT\r\n"
+    "MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j\r\n"
+    "b20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IENBMIIBIjANBgkqhkiG\r\n"
+    "9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4jvhEXLeqKTTo1eqUKKPC3eQyaKl7hLOllsB\r\n"
+    "CSDMAZOnTjC3U/dDxGkAV53ijSLdhwZAAIEJzs4bg7/fzTtxRuLWZscFs3YnFo97\r\n"
+    "nh6Vfe63SKMI2tavegw5BmV/Sl0fvBf4q77uKNd0f3p4mVmFaG5cIzJLv07A6Fpt\r\n"
+    "43C/dxC//AH2hdmoRBBYMql1GNXRor5H4idq9Joz+EkIYIvUX7Q6hL+hqkpMfT7P\r\n"
+    "T19sdl6gSzeRntwi5m3OFBqOasv+zbMUZBfHWymeMr/y7vrTC0LUq7dBMtoM1O/4\r\n"
+    "gdW7jVg/tRvoSSiicNoxBN33shbyTApOB6jtSj1etX+jkMOvJwIDAQABo2MwYTAO\r\n"
+    "BgNVHQ8BAf8EBAMCAYYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUA95QNVbR\r\n"
+    "TLtm8KPiGxvDl7I90VUwHwYDVR0jBBgwFoAUA95QNVbRTLtm8KPiGxvDl7I90VUw\r\n"
+    "DQYJKoZIhvcNAQEFBQADggEBAMucN6pIExIK+t1EnE9SsPTfrgT1eXkIoyQY/Esr\r\n"
+    "hMAtudXH/vTBH1jLuG2cenTnmCmrEbXjcKChzUyImZOMkXDiqw8cvpOp/2PV5Adg\r\n"
+    "06O/nVsJ8dWO41P0jmP6P6fbtGbfYmbW0W5BjfIttep3Sp+dWOIrWcBAI+0tKIJF\r\n"
+    "PnlUkiaY4IBIqDfv8NZ5YBberOgOzW6sRBc4L0na4UU+Krk2U886UAb3LujEV0ls\r\n"
+    "YSEY1QSteDwsOoBrp+uvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQk\r\n"
+    "CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=\r\n"
+    "-----END CERTIFICATE-----\r\n"
 };
 
 const char *iot_ca_get() {