How do I properly detect if my Particle Photon is offline?

Developer Programs Writing Device Types
#1

How do I properly detect if my Particle Photon is offline?

I currently setup a function that gets called every 15 minutes that pings the Particle Photon.
It works fine when the Photon is online but fails when it is offline.

private getStatus() {
    def params = [
        uri: "https://api.particle.io/v1/devices/${deviceId}/status?access_token=${token}"
    ]
    
    asynchttp_v1.get(processData, params)
    log.info("getStatus")
}

def processData(response, data) {
    log.info("processData")
    
    if (response.data.hasError()) {
    	log.info("Test.")
    }

    // More code.

}

The Particle Photon outputs:

{"error":"Timed out."}

When offline and SmartThings outputs:

error java.lang.IllegalArgumentException: Failed to complete. Message was: Read timeout to api.particle.io/34.226.167.93:443 of 20000 ms @line 93 (processData)

I have tried reading Particle Photon’s response.

private getStatus() {
    def params = [
        uri: "https://api.particle.io/v1/devices/${deviceId}/status?access_token=${token}"
    ]
    
    asynchttp_v1.get(processData, params)
    log.info("getStatus")
}

def processData(response, data) {
    log.info("processData")
    
    def results = new groovy.json.JsonSlurper().parseText(response.data)
    
    if (results.error) {
    	log.info("Test.")
    }

    // More code.

}

Which results in a similar error in the SmartThings Logs.

#2

There seems to be a longer timeout on the Particle side than the 20 seconds that asynchttp_v1 is willing to wait, so that it hangs up before the api.particle.io has given up on receiving a reply from your Photon. Can’t help you with a fix though, haven’t found a timeout parameter for the http call. But fairly fresh off the boat when it comes to SmartThings, so perhaps someone else knows of a way to do an external http call with longer timeout. Presumably there are no config options in the Particle api to make it give up sooner either?

OK

#3

Try to implement your code in a try/catch code block. If you get a timeout, then update the status of your particle photon accordingly. At least the code will not error out.

#4

I figured it out.
I was using the wrong api call for that purpose.

It should have been:
https://api.particle.io/v1/devices?access_token=${token}

I would have deleted this earlier.
How do I remove topics?

#5

No need to delete the topic. It may be useful to other users in the future.

Glad to hear you got it working.