Any physicists here?
- Thread starter Cromulent
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How about you say what you want to transmit, and over what distance and then you may attract some sensible answers.
No. Sorry I wasn't clear. See below for what I want.Bluetooth?Are you wanting to create a new wireless standard? Have you been drinking?
OK. I'm sorry to everyone for not being clearer.
What I want to do is similar to WiFi Direct or Bluetooth Mesh. One (or more) device(s) will send data over a specific frequency for a reasonably short range. Still, instead of clients having to connect to the server or sender explicitly, they can passively receive data by constantly checking the specific frequency.
I have read of WiFi Direct and Bluetooth Mesh, but neither seems to offer that feature. If I am wrong on that, then feel to correct me. As I said, I'm just learning.
I don't think anything will do that because it wouldn't really work outside of laboratory conditions. You need some sort of handshake between sender and receiver otherwise there's no way to know what else is on the network and who the senders and receivers are.
Each device would have to listen for every packet and assume all of them were addressed to it. If you had more than 2 devices or more than 1 network within range of each other it would all crash.
I've been looking at LoRaWAN stuff recently and just this week got an endpoint (Adafruit M0 RFM95 if I remember correctly) sending data to a The Things Network indoor gateway I bought for testing. TTN have lots of useful reading material to understand if this is the level you want to play around at.
Essentially the idea is lots of public gateways that your smart cows, badgers etc can connect to. TTN and others have maps showing where they are. Coverage is more complicated than cellular, but if you're in a city you may be in range. I am in the sticks hence buying a gateway to test.
So far for me it's involved a bit of soldering (headers, a uFL surface mounted socket), and a bit of Arduino coding. And a lot of interneting.
Have a read through the following, not just glance at the headline:
nRF24L01 – How It Works, Arduino Interface, Circuits, Codes
In this tutorial we will learn how to use the nRF24L01 RF transceiver module to make a wireless communication between two Arduino boards.
howtomechatronics.com
I haven't said this since the 1980's but... 10-4 for a copy
Got you 5 by 5. What's your handle?
Soldato
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This might be of interest to you, seems to offer an alternative to TTN, my knowledge only goes as far as watching this youtuber though as I haven't needed to utilise any data transfer electronicy stuff
OP said he didn't want a 'server', MQTT uses a broker which the OP appears not to want.
Soldato
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I wasn't replying to the OP so kindly remove your nose
Heat got to you?
Ah thanks Orange, that was interesting to watch. It's reminded me I need to transmit battery voltage!
Seems that the gateway is explicitly defined there, it working out as a private network. It's good to get away from TTN if their value is negated, which is something I'll definitely be looking at in the future.
It also reminded me I need to move to github. So many thanks it was most valuable
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Soldato
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- 25 Nov 2005
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It's like being stuck inside a tumbledryer
I enjoy his channel loads of interesting maker stuff I wish I could be doing myself if I could be botheredSo many thanks it was most valuable
