I reached out to a PTC ThingWorx Consultant and discovered where to get these files.
On the Raspberry Pi page you linked, there is a "Quickstart Console" blue box on the left-hand side. In the box, there is a "Launch" button that prompts you to log in and download the zip file containing the install files.
Hope this helps.
So, next step… I have the files on my pi, I’m running twc_agent as described (sudo ./twc_agent) but I get a ton of ws_on_header_value: Websocket connection failed, twWs_Connect: Error trying to connect ws_on_header_value: Invalid ‘connection’ header: Upgrade messages.
When I ping device.cloud.thingworx.com, I get an IP address from DNS (184.108.40.206), but no response to the ping.
What needs to be upgraded here?
Here’s the debug output from an attempted connection, it looks like the server wants to upgrade the client and the client doesn’t know what that means:
2015-10-29 16:05:59,735: twTlsClient_Reconnect: Re-establishing SSL context
2015-10-29 16:05:59,737: twTlsClient_Connect: Connecting to server
2015-10-29 16:05:59,787: twTlsClient_Connect: TLS connection established
2015-10-29 16:05:59,788: twWs_Connect: Connected to device.cloud.thingworx.com:80
2015-10-29 16:05:59,788: twWs_Connect: Sent request:
GET /Thingworx/WS HTTP/1.1
User-Agent: ThingWorx C SDK
2015-10-29 16:05:59,967: HTTP Response begun
2015-10-29 16:05:59,967: Header->server : Apache-Coyote/1.1
2015-10-29 16:05:59,967: Header->upgrade : websocket
2015-10-29 16:05:59,967: Header->sec-websocket-accept : cVyWkGmJ2JxlY9vpR2i9bxFoAtQ=
2015-10-29 16:05:59,967: Header->date : Thu, 29 Oct 2015 20:06:04 GMT
2015-10-29 16:05:59,967: Header->connection : Upgrade
2015-10-29 16:05:59,967: ws_on_header_value: Invalid 'connection' header: Upgrade
2015-10-29 16:05:59,967: ws_on_headers_complete: Websocket connection failed
2015-10-29 16:05:59,967: twWs_Connect: Parsed 193 bytes out of 193
2015-10-29 16:05:59,967: twWs_Connect: Error trying to connect
2015-10-29 16:05:59,967: twTlsClient_Reconnect: Re-establishing SSL context
2015-10-29 16:05:59,969: twTlsClient_Connect: Connecting to server
2015-10-29 16:06:00,22: twTlsClient_Connect: TLS connection established