joris@ScoutDomoticz:~ $ curl -v https://api.thingspeak.com/update?api_key=XXXXXXXXXXXXX&field1=22.5
[1] 31013
joris@ScoutDomoticz:~ $ *   Trying 34.237.32.84...
* TCP_NODELAY set
* Connected to api.thingspeak.com (34.237.32.84) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/certs/ca-certificates.crt
  CApath: /etc/ssl/certs
* TLSv1.2 (OUT), TLS header, Certificate Status (22):
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Client hello (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS change cipher, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
* ALPN, server did not agree to a protocol
* Server certificate:
*  subject: C=US; ST=MA; L=Natick; O=The Mathworks, Inc.; OU=EPS DevOps; CN=*.thingspeak.com
*  start date: Apr 17 00:00:00 2018 GMT
*  expire date: Jun 26 12:00:00 2020 GMT
*  subjectAltName: host "api.thingspeak.com" matched cert's "*.thingspeak.com"
*  issuer: C=US; O=DigiCert Inc; OU=www.digicert.com; CN=DigiCert SHA2 High Assurance Server CA
*  SSL certificate verify ok.
> GET /update?api_key=BNHON7GQASBJ83GJ HTTP/1.1
> Host: api.thingspeak.com
> User-Agent: curl/7.52.1
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Type: text/html; charset=utf-8
< Content-Length: 3
< Connection: close
< Status: 200 OK
< X-Frame-Options: SAMEORIGIN
< Access-Control-Allow-Origin: *
< Access-Control-Allow-Methods: GET, POST, PUT, OPTIONS, DELETE, PATCH
< Access-Control-Allow-Headers: origin, content-type, X-Requested-With
< Access-Control-Max-Age: 1800
< ETag: "a96b65a721e561e1e3de768ac819ffbb"
< Cache-Control: max-age=0, private, must-revalidate
< X-Request-Id: 838b83d6-3fff-461e-a3ca-df60784e4b6f
< X-Runtime: 0.033468
< X-Powered-By: Phusion Passenger 4.0.57
< Date: Sun, 18 Nov 2018 10:56:46 GMT
< Server: nginx/1.9.3 + Phusion Passenger 4.0.57
<
* Curl_http_done: called premature == 0
* Closing connection 0
* TLSv1.2 (OUT), TLS alert, Client hello (1):