So I downloaded Android pay and got it setup with my card only to find that my phone doesn't have NFC. How I missed this, I don't know.
I was thinking this: could you put and NFC tag on the back of the device and somehow rig it to work? If not, would it be possible to get NFC hardware to work with a device that doesn't have it?
You can attach external NFC readers via USB or audio port. Technically, these would not be drop-in replacements, so you'll have to go with special apps which make use of the readers.
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I am trying to make it so that my ESP32 board can detect my phone when I approach it based on RSSI. However, the ESP32 cannot see the phone unless the phone is in discovery mode, which is not super useful. To solve this, I was hoping to pair my phone with the ESP32 so that the phone would always be looking for the ESP32, and connect when it is found without any human intervention.
I decided to try the Arduino integration, but as I was working through all of the examples I couldn't find any with this functionality, so I'm kind of lost. If this is not possible or easy with Arduino, I am willing to switch, but I was unable to find anything about pairing in the normal phone interface for ESP-IDF either.
So, basically, using an ESP32, how do I pair to a phone?
The easiest way is to make the esp a gatt server and advertise a specific service. The phone will look for that specific service and connects if found.
You could make an app for your phone, like for ios its pretty easy. But keep in mind for mobile devices a continuous search for devices could be power unfriendly if misused.
If you use esp-idf instead of arduino, some examples are included. (You could use the vscode integrated esp-idd) Check learnesp32.com for an easy step into the basics, coming from Arduino.
Is there any ways, I can store some data in NFC storage element of android device using some special phonegap plugin? I understand, we can read/write nfc tag and can transfer the same from a android device to another android device using Chariot Solution phonegap-nfc plugin ( https://github.com/chariotsolutions/phonegap-nfc ). I need to know, is there any plugin for storing some data in nfc android device, Please advice! Expecting any sort of suggestions and comments. Thanks in advance
There are ways, but cryptographically protected, so you'll need permission from whoever is controlling the Secure Element (I am assuming that by "NFC storage element of android device" you mean the secure chip connected to the NFC frontend and antenna). The Secure Element is the same kind of chip as the ones used in smart cards (not a plain NFC tag), so you will need to know the keys to access it. They are usually very tightly controlled by the phone manufacturer.
Other phones do not have Secure Elements themselves, but connect NFC to their SIM card, which then becomes the Secure Element: in that case, keys are controlled by the mobile network operator.
Standards to access the Secure Element from the rest of the phone are published by the SIM Alliance.
I'm currently working on a device which is able to work as a keyboard and communicate via Serial with a self-written software.
Now I have to install serial drivers (from Arduino) on different computers if I want to communicate with my application which I actually want to avoid.
Is there any other solution to solve this problem? Is it possible that my microcontroller works as a keyboard AND is able to send and receive data as HID device?
Thanks and greetings!
I actually do something similar with a 32u4, but it receives its serial over the built-in UART. I do this because it's linking between two separate systems. If it were only one system I could implement a 2nd interface. (Don't forget, a USB HID device must have an IN endpoint even if you are not using it.) Or you could just throw a $2 USB/TTL converter on and do it the same as I did.
I wonder whether it is possible to emulate a specific bluetooth device like a Remote Controller for a TV or another device with my PC. I'd be okay with installing an additional hardware device for my computer (e. g. a BlueTooth PCIe card).
I imagined something like "recording" all single commands of my original remote controller using my Bluetooth card and afterwards use these recorded commands to turn on my TV for example.
Is something like this possible (with additional hardware maybe)?
Of course this is possible. Bluetooth is just a protocol and you can impliment it in your custom software to emulate all kinds of devices. If you need to emulate simple devices like keyboard or mouse, there are many ready solutions like this.
But if you have non standard device, there won't be any ready solutions and you will have to implement it yourself. What can help you:
If you have some kind of controller for PC and you want to emulate device with unknown protocol, you can use WireShark or other sniffer to understand what's going on.
There is an emulator called BT-Sim, but it is so poorly documented that I can't even guess what it does.
You can can take as example different android software like described in answers to this question.
You can check different program samples for PC like this.
For hardware you need only simple Bluetooth dongle. However, if you want to spy on some BLE (Bluetooth Low Energy) devices, you can buy hardware sniffer like this.
(At least in Windows 10) Microsoft Store has an application called "Bluetooth LE Explorer" which is able to simulate different kind of Bluetooth GATT profiles as a peripheral.
I'm currently working on a project for an interactive visitor centre in Laguna Beach, CA.
There are many touchscreen devices around the space, which we are developing some cool software for, however one of the client requests is to allow visitors to transfer image, pdf and video files from an interactive coffee table touchscreen onto their phone.
The client has seen this on YouTube/CES etc.. You know, where someone puts a phone on a the interactive surface and then magically swipes images onto the phone from the screen.
Of course, if the visitor had a custom app on their phone, and was already on the same WiFi this would not be so much of a problem. I suspect this is what happens on these magic demos that we see.
In our situation, we don't want the visitor to download an app really, we just want the easiest solution and experience for the visitor. We have a public WiFi available to us, and we can install an NFC device on the touchscreen and the touchscreen also has bluetooth.
My ideal scenario would be for the user to pop their NFC enabled phone on the table, the table recognises it, pairs with BT or WiFi and away we go! I'm not sure how practical this is though having researched around. Clearly thats not going to work on an iPhone. I don't mind a couple of mechanisms i.e. one for Android/other NFC phones and one for iPhone.
Does anyone have any experience of this kind of thing and suggestions of how to handle it?!
Here's a mock up of our 32" Coffee Table touchscreen just for some context
Thanks for reading through and having a think :-)
I know that there is standardized way to pair Bluetooth device using NFC tag. I think this is the best solution for you. The authority that is standardizing this format is called NFC Forum. You can find more info about the topic in this document: Bluetooth Secure Simple Pairing Using NFC