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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.
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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 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 was explaining I2C/SPI serial protocols to my friend when he mentioned there's a way to send data between two devices using one wire with the 4B5B protocol. If this is true, why isn't 4B5B used to, say, send data between arduino and peripheral devices?
The short answer is that 4B5B isn't a protocol you can use while I2C and SPI are.
I2C and SPI qualify as OSI Network level 1 and 2 specifications, covering both physical electrical specifications of connection between devices and how the connected devices use the connection to communicate. 4B5B is merely a bit encoding scheme, covering only how to represent 4 bits of data in 5 bits of signal to ensure that the resulting signal has adequate auto-clocking content. 4B5B is not a "protocol" or a level 1 or level 2 network specification, meaning that if you try to connect two devices "using 4B5B" you will still have far too many unspecified details to be able to actually create a connection over which you can exchange data.
Here's a not so useful answer: I think the main reason why it is not part of the Arduino platform is that it isn't implemented on most of the chips on which Arduino is built:
Arduino Nano and Uno are based on ATmega168/ATmega328. Neither 168 nor 328 have 4B5B nor Dallas 1-wire protocol support.
Arduino Due uses ATSAM3x8e. It likewise lacks support for one-wire protocols
Arduino Lenonardo uses a different AVR-architecture chip, the ATmega32u4, but same story.
In the end, the question probably should be put to Atmel rather than Arduino designers.
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I need to connect two wired devices using wifi, since I cannot connect them directly with a wire. So on the first side I placed an access point that does also wifi and acts as a dhcp server, and the first appliance is wired connected. On the other side I guess I need at least a repeater, but that can output the signal received also to the wire. Is this possible? Which appliance do you suggest me to use?
You can use a wireless bridge or a wireless router running a custom firmware to turn it into a bridge (DD-WRT). Any cheap wireless router that supports DD-WRT or tomato will work. I've used one of these as a wireless bridge before.