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- เผยแพร่เมื่อ 20 ก.ค. 2024
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LoRa is one of the protocols that allows low power sensor to transmit data over a long distance, up to a few Km. This is an introduction to the LoRa protocol and to the LoRaWAN network specification. - วิทยาศาสตร์และเทคโนโลยี
Thank you so much for the valuable information.
top class and very simple.
Thank you very much sir for such a good knowledge!!!!!
I'm just learning about LoR and I have to say it's a great presentation of this system. One note - we don't see what you show on the slides in the presentation. Maybe some glowing points in the presentation for the future? ;)
And one question - is it best to use class "A" for buttons? Without listening for a return signal? Click, wake up, send?
Thanks for video, can yu suggest LoRa devices type in Japan
Thank you for this interesting introduction to Lora and LoraWan. So we have layers 2 - 4 of the ISO model.
How can this be used to advantage by private people?
so informative thanks
Great presentation, detailed information. Could you make a similar video explaining LoRa usage licensing and certification? Can two devices use LoRa to communicate between them without using gateway? Are there licenses and/or payments associated for sensors/devices using LoRa technology?
You can communicate two LORA devices with each other. There is a range of frequency in which you have the access to use the technology.
what is the difference when we said "lora node and lorawan node" ?
india using 868 MHz, not 433 , pls correct
thanks !!
Correction - Australia uses AU915 and AS923 bans not 433MHz
I want to set transmission between two lora module but i have no idea to how to declare lora as transmitter and other one is reciever.. can you help me
lora node can not communicate with a gateway ??
informative thanks
good gob doc. god bless you
greeting from iraq
explained clearly
Can these devices be used to communicate p2p without any gateway connecting to the internet?
Is 2-way communication possible, or is it always one slave and one master?
More error check bits therefore more transmission therefore more battery use
How can we implement LoRaWAN network in simulation i,e Matlab, C++, Go, and Python etc?
Very Nicely explained. Very helpful. If I have some more queries , how do I connect you further ?
You can drop us an email at office@wyliodrin.com.
Dear young engeneer, please don't provide wrong informations: there are not "free" bands where you are allowed to transmit "freely". There are band where a license is not requested, but the device must be approved by local autority. Of course one of the limit is the ERP or the EIRP: it means that the antenna is included in the account to be approved. So it's not enough to chose the right band because you cannot switch on the module (+ antenna) you presented without the entire device is approved by the authority. Probably using an approved antenna the range will be also much less than kilometers. Another thing: the low trasmitting bit rate, tipical for the LoRa system, does not came from interference on the same frequencies; if no interferences are present the bit rate will be very low anyway. The reason is in the special kind of modulation chose for its robustness against interferences: a spread spectrum modulation in which a narrow radio carrier, psk modulated, quickly sweeps his frequency through the part of the spectrum you decided. Thanks to this system you can extract the informations even if other transmissions are inside the range of frequency you are sweeping: a standard, non LoRa transmission will occupy just a very little part of your emission. That is the reason you can transfer datas so far away. Expecially in that case, interferences are not the cause of the low bit rate: it has been choose intentionally! E.g. 2.4 GHz is much more crowded band, but the bit rate is much much higher than LoRa : it depends mainly on the wideness of the channel and the kind of modulation. After this beginning I stopped the video and I do not know what you state in the rest of the "lecture" but, as your audience that did not contested your statements, other people can believe you: so please rectify those sentences.
This is True !!
Not LoRa Transponder. Correctly LoRa Transceiver!
Could he not hear that the mic was to close to his mouth? Did he say to be careful to remember which continent your on so you don't set the wrong frequency @5:40? Pardon me? Is his audience High School students with no technical training? I thought his audience was licenced professionals or at least amateur enthusiasts. Did he think we were going to chose a frequency at random? What? He's made quite a few errors, he needs to spend more time on his presentation.