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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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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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jason
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Actually, the SDK provided with the device is working on Android Gradle 7.0.3 which is quite old. We tried to upgrade the Gradle to 8.4 version but we faced issue. We would like to get confirmation from you that its possible to upgrade Android and Gradle version and still use your SDK. also can we upgrade the Android firmware in order to use flutter for some app development ?
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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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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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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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Is there a way to configure the QR code scanner on T10 device for better paper scanning?
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T20
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macacode
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t10
qrcode
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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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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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jason
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Welcome to Telpo Q&A,
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