Use token to correlate "requests" and "responses". #210
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Issue: MQTT is not a request/response protocol. Messages for the Shadow service have a "client token" field to help users correlate "request" messages to "response" messages, but this sample script wasn't using the token field. This led to confusion when running Device Advisor tests which send several
shadow/update
"request" messages during setup. The sample was receiving theshadow/update/accepted
"response" messages unexpectedly leading to crashes.Changes: Set token on all "request" messages. Ignore any "response" message with an unexpected token.
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