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for the QR reader - we are using the telpo_api with RSReader class as in TPS530 devices. But we don't receive any bytes using rsReader.rs_read() the QR reader beeps and recognizes the QR code, but there are no bytes coming from RSReader
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T20
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jason
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jason
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The SDK of the T20 device has some differences from the SDK of the 530, and we have made the development documents and API interface descriptions for the T20 device.please refer to the correct document.
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T20
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anonymous
where can I found the correct developer documents?
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my main issue for now, is managing to handle Ultralight EV1 tag. for that we are used to send raw APDU. I have tried, to use the nfc.transmit method, but I suppose it needs to receive more than just the basic apdu code, and it's more low level than I expect. Basically I'm used to transceive : 0x60 -> GET_VERSION 0x1B... -> PWD_AUTH 0x30... -> FAST_READ ... But here passing those value give me errors. I had no issue using the m1_authenticate m1_read_block m1_write_block If you have some sample code, managing to read/write or send the GET_VERSION apdu to an ultralight code, it should be enough for me to take after.
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Hello team, I was able to check the demo for the NFC Mifare classic. The problem with the demo is you need to press a button to open the nfc, then you need to press another to authenticate and finally press another to read. With our app we need to be able to do all this steps without user interaction. Apart from that we need the app to be listening all the time for an incoming nfc tag. That’s why I was asking you last time if there’s something like a listener similar to the one you have with the QR Reader (setHardReaderListener). I would really appreciate if you can help me with this. Thank you.
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T20
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jason
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They are connecting external printer via USB but sometimes printer get disconnected and they need to disable and enable usb mode on TPS530 to make it works again. Is there any API or command which can disable and enable USB mode? Currently, we need to open Settings > About > Security Bootloader > tap 5 times
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TPS530
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jason
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How we can do send and change the state to receive in same time using RS485 ?
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T20
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jason
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I was testing our app with the T20. The NFC and QR reader did not work with our app. Are this functionalities native to the device or they work with an SDK? Thank you
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T20
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are there any instructions to remove the backplate? we are trying to install an sd card
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T20
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jason
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When using Firebase libraries I encountered a problem, google play services and google play store are not found in the operating system
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T20
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jason
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Would you tell us commands to change the qr scanning mode in Telpo T-20? We need to turn off the scanner after scanning. now the problem is that the scanner does not turn off after reading and immediately reads the same qr
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T20
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We have a site with high sun... and the QR scan has problems... then we need to pass our hand to make it work... *** maybe is possible always leave the light on?
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T20
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jason
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do you have documentation/examples for Mifare Desfire Cards of VP3300? We can work with mifare classic cards but we couldn't figure out how to use the mifare desfire cards
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T20
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jason
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Welcome to Telpo Q&A,
If you have a technical question ,
please ask here, in English.
.
If you have faulty devices need be repaired,
please create a issue ticket.
Please
inquiry your ticket.
Notice :If you have an urgent question or cannot register account of Q&A, you can contact the online support in below jivochat .
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