ajay-terminal | Stripe Developers | Page 1

ionic cove Dec 14, 2021, 5:45 AM

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hello @slender grail, how are you displaying that your devices are online/offline?

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i.e. what is the code snippet you're running to discover whether a reader is online/offline?

slender grail Dec 14, 2021, 5:47 AM

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partial code looks like below

connectReaderHandler: function () {
var selectedReader = null;
this.discoveredReaders.forEach((value,index ) => {
console.log(index);
console.log(value.label);
console.log(value.status);
if (value.id == defaultDevice) {
selectedReader = this.discoveredReaders[index];
}
});

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console log show status is online even if that device is switched off

ionic cove Dec 14, 2021, 5:57 AM

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my guess here is that you may be storing previous state / discoveredReaders without "re-discovering" upon page load. I'd suggest adding logs / breakpoints to your code and walking through them to figure out where exactly the issue is occurring

slender grail Dec 14, 2021, 6:10 AM

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I am making my google chrome refresh page
Also try with hard refresh too

but still same

but after some time that device list shows its offline

ionic cove Dec 14, 2021, 6:20 AM

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hmmmm, i'm not sure off the top of my head what is the expected speed that it's supposed to show offline. Sorry to redirect you but can you write in to Stripe Support and let them know that it's taking a couple of minutes to show offline and if that's expected?

slender grail Dec 14, 2021, 6:24 AM

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Already chat with support
they said maybe issue is that I am testing from India (not stripe support here)

but I have checked with my US client too
he too facing same issue

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my question is does that stripe device shows realtime online offline?

ionic cove Dec 14, 2021, 6:33 AM

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gimme a second, let me check in with someone else to see if they can help

solid mica Dec 14, 2021, 6:47 AM

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Hi @slender grail let me help you on this

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So when the readers are offline, and you can still get the reader array after calling terminal.discoverReaders(config) ?

slender grail Dec 14, 2021, 7:47 AM

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yes
aint it terminal.discoverReaders(config) just return you list of all readers? either its online or offline

solid mica Dec 14, 2021, 7:52 AM

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if all readers are offline, it will return an error.

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can you share with me the code on how you use terminal.discoverReaders(config)?

slender grail Dec 14, 2021, 9:01 AM

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full code function

connectReaderHandler: function () {
var selectedReader = null;
var defaultDevice = document.getElementById('hdnDefaultDeviceId').value;
this.discoveredReaders.forEach((value,index ) => {
console.log(index);
console.log(value.label);
console.log(value.status);
if (value.id == defaultDevice) {
selectedReader = this.discoveredReaders[index];
}
});
if(selectedReader) {
if(selectedReader.status=="online") {
console.log(selectedReader);
this.terminal
.connectReader(selectedReader)
.then(function (connectResult) {
if (connectResult.error) {
console.log("Failed to connect: ", connectResult.error);
this.message = 'Failed to connect stripe device';
} else {
console.log("Connected to reader: ", connectResult.label);
console.log("terminal.connectReader", connectResult);
this.collectPayment();
}
}.bind(this));
}
else {
alert('Check your device is on and status is online');
this.message = 'Check your device is on and status is online';
}
}
else {
alert('No device found');
this.message = 'No device found';
}
}

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AND ALSO

discoverReaderHandler: function () {
var config = { simulated: false };
this.terminal.discoverReaders(config).then(function (discoverResult) {
if (discoverResult.error) {
console.log("Failed to discover: ", discoverResult.error);
} else if (discoverResult.discoveredReaders.length === 0) {
console.log("No available readers.");
} else {
this.discoveredReaders = discoverResult.discoveredReaders;
console.log("terminal.discoverReaders", discoverResult.discoveredReaders);
this.connectReaderHandler();
}
}.bind(this));
},

coarse mural Dec 14, 2021, 9:10 AM

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I'd assume there's just some lag involved here. The readers ping Stripe periodically to notify they they are online and discoverable so until enough time elapses for when they 'should have' pinged they would be discoverable , I'd assume

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it's pretty minor, I think and it's just something you have to work with, it's how this works

solid mica Dec 14, 2021, 9:16 AM

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When do you call the discoverReaderHandler() ? discoveredReaders array may not be the most not up-to-date state that reflects the statuses of the readers.

slender grail Dec 14, 2021, 9:46 AM

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initialize: function () {
this.terminal = StripeTerminal.create({
onFetchConnectionToken: this.fetchConnectionToken,
onUnexpectedReaderDisconnect: this.unexpectedDisconnect,
});
console.log(this.terminal);
if(this.terminal) {
this.discoverReaderHandler();
}
}

coarse mural Dec 14, 2021, 9:50 AM

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yeah it's nothing to do with your code, it's just what I said above

slender grail Dec 14, 2021, 9:58 AM

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then how can I use this code
if(selectedReader.status=="online")

as reader is switched off but response shows its online?

coarse mural Dec 14, 2021, 10:01 AM

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it is just temporary, it would be marked as offline after a little while

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if you try connecting to the reader and get an error (because for example it's turned off) you just ask the cashier to e.g. select a different reader to connect to, or check the reader they want to use is turned on and charged, etc etc

#ajay-terminal