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7

I will leave the main part of the previous answer below, as it contains more information about the differences between several radio protocols. As for the differences between Zigbee 3.0 and Z-Wave, let's do a side by side comparison: Frequency: Zigbee uses the 2.4GHz band, while Z-wave uses the 868MHz band in Europe and the 900MHz ISM band in the US (see ...


3

My experience is there is no particular standards for saving sensor data. Usually one just picks a format that is useful to the task at hand. If, for instance one wants to do post processing analysis in Excel then CSV formatted text files work pretty well. If you do use CSV, then just save numerical values. Don't add text indicating units to each number as ...


3

I would keep the sensors passive as transponders to a house wide rfid radar scanner. Changes in the sensor would change the code on the rfid of the sensor, thus reflecting back a different transponder code to the central scanner. See Intelligent RFID transponder takes over monitoring function An example would be a temperature sensor where the rfid code ...


2

Those two standards have numerous similarities and the differences really come down to flexibility versus simplicity. Bluetooth is ubiquitous, feature-rich, and very mature. Newer cell phones will easily interface with your architecture as will a plethora of other devices. It is also relatively faster with a 1Mbit/s transmission data rate (about a quarter ...


2

I think you won't get this done without some kind of processor and customized firmware to convert the sensor signal to a digital signal for WiFi transmisson. The dongle is a good idea, but it provides only the transmission, not the convertion. For more accurate advices, you should provide more details on the targeted sensors and the network you want to ...


1

It looks like the devkit associated with the NodeMCU community. If you turn it around with the metal portion facing away from you it should say something like "devkit v1.x". It's a developer board with an ESP8266 built into it. You can actually see the ESP8266 board sitting on top of the other board in the photo! The ESP8266 specifies only the ...


1

There should be writing on the top (metal) portion and/or some silk screening on the bottom. Either an ESP32 or (more likely) an ESP8266. That should give you enough info to get started...


1

The cheapest option for you to consider would be to use Esp8266 modules. They technically cost 1 USD. You can import a bulk (lot) order from aliexpress to make it cheaper. For you command centre you can use a NodeMCU (Esp8266 V12E) costing about 10-12 USD (800 INR). Program the NodeMCU as a server and the smaller Esp8266s as clients. It is pretty simple ...


1

The present technology is all about IOT i. e with millions of devices connected over internet. Zigbee and BLE are two types of wireless communication which is used for interacting between two or more things or devices. Both have their own protocol and both have their merits and demerits. BLE(Bluetooth low energy) is a wireless personal area network with ...


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