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Is the blynk platform takes the MQTT protocol ?
for communication from the Arduino what is the protocols it used for blynk platform ?
Blynk uses its own proprietary binary protocol to communicate from Blynk library on the IoT device to Blynk cloud servers. This allows to use Blynk on microcontrollers with limited memory space.
To use Blynk Cloud and Blynk App you have to use the Blynk library on the IoT device.
I am not affiliated with Blynk.
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I would like to use a BLE temperature sensor (such as the Inkbird IBS-TH1 Mini BLE Sensor), however, I want to be able to display the temperature measurements in my own website. To do this I am planning to have an ESP32, which would intercept the temperatures sensor's BLE messages (and then send them to Firebase Realtime Database via WiFi). I know how to use the ESP32 to find advertising devices, however, I am not sure how to receive the measurements the sensor is transmitting. I have seen libraries such as the ESPHome or ESP32-mqtt-room, but I was wondering whether there is a way to bypass them? Is it neccesary to use mqtt or mosquito? Or is it possible to achieve this using solely the Arduino BLE library?
Any help would be appreciated!
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I have kind of confusion about BLE secure connection.
I am working on an IoT project. I am using ESP32 development board. At one point of my project I have to send some data like Email and Password from android phone to ESP32 connected over BLE.
My question is it how to make it most secure? since i have to transfer user password over it.
Is there any difference between paired connection vs unpaired connection?
which encryption method I should use?
If you are sending sensitive data over BLE, then you have to consider multi-level encryption that includes hardware, software, and then the communication link (BLE). For BLE, the way to achieve encryption is through the pairing mechanism, i.e. you have to initiate pairing from the Android device before sending the data over.
Please have a look at the following StackOverflow questions that detail this:-
How to encrypt data using BLE connection using Bluez5.50
Should one create a bond with a Bluetooth LE device
Finally, I would recommend sending such non-programming questions on other sites (e.g. InformationSecurity) as your question will have more traction there and you're more likely to find a suitable answer.
I hope this helps.
The best way to secure data transmission is to use end-to-end encryption. When you encrypt end-to-end you're no longer dependent on the underlying transport layer's security.
In this case since you control the code on both the Android phone and the ESP32, you can pre-share a key between them and encrypt the sensitive information before you pass it to Bluetooth.
It's still good to take advantage of whatever underlying security Bluetooth or other transports provides, but having your application encrypt the data will help improve your application's security over just depending on the transport layer.
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I need to findout the distance between Wifi routers and devices connected in that Wifi. The Wifi is an open wifi, so there can be n connection.
The distance have to be tracked in wifi router not the device. Is it possible to do the same? If so then how?
Can we write a program and set the custom router for the same, if so, how can we achieve it?
Thanks,
Nikhil
If the router is linux-based, you may for example develop a simple C application periodically fetching iw dev <your_wlan_interface> station dump command output. this command lists all devices currently connected to "your_wlan_interface" and contains signal strength information as well.
Converting signal strength to the distance is another task to solve and in my opinion it is quite clearly described in the link provided
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I am supposed to work on project which involves communication between 2 GSM 900A modems. The main idea is to acquire data in remote location through Arduino (Arduino Mega in my case) and transmitting the data to the Server which will be my laptop, in which that communication part i use 2 GSM 900A modems. I am new to GSM modems so could you please help me with your ideas for establishing communication between 2 modems..
I posted a blog on this topic which is given below. I think it may be helpful for you. link:http://www.jellyfishtechnologies.com/category/embedded/
GSM modems do not follow a common standard, although the command set does tend to be a superset of Hayes AT. You will need to refer to documentation and development kits for your particular devices.
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I am not familiar with ZigBee technology. And I am bit confused. Does Zigbee need a transmitter and receiver? How is its networking flow?
I was thinking of the notifications that our system have would be send to an application in a PC via ZigBee. That is, drop rate changes of dextrose shows in an application / interface.
ZigBee is built on top of the 802.15.4 standard. It's a bi-directional protocol... so to participate in a ZigBee network (or any 802.15.4 network) you need a transceiver (transmitter+receiver). There are lots of products on the market, but I'd suggest you take a look at the Digi XBee modules. A lot of the complexity of implementing ZigBee is built into the modules so that you don't have to worry about it.
The book "Building Wireless Sensor Networks" by O'Reilly is a good start if you go the XBee route.