I am building a two part weather station, and I'm wondering if this looks like a good module for communicating between the two parts:
https://www.ebay.com.au/itm/324159920572
If this looks like a shocking idea, does anyone know what the best option for a wireless module would be?
Those are a good choice.
They are 3.3V.
Powering them from the Arduino is not recommended, use an external 3.3V power supply for these.
@LarryD
Why can't I power it off my arduino?
I'm running the external part of my weather station off of a battery (probably the internal one too), so I'd kinda like to run everything off my arduino if I can.
The on board regulator on the Arduino cannot supply enough current.
Connect your battery to a DC to DC converter to get 3.3V
Oh ok, thanks. I will do that.
What is the battery voltage ?
@LarryD
That hasn't been decided yet...
https://forum.arduino.cc/t/mega-2560-and-two-26650-rechargeable-batteries/1003654/29
If you know the answer to this topic, then that is your answer to the battery voltage.
I think it will most likely be 5vdc.
Alternative approach: 2x RFM95 LoRa transceivers, 3.3V Arduino powered by 3.7V li-ion battery or li-po pack. Use a low drop-out regulator like mcp1700 to maximise battery life.
https://www.ebay.com.au/itm/303670383108?hash=item46b42a5204:g:D70AAOSwTKBaml7b&frcectupt=true
Will the 915mHz one work?
And this?
@LarryD What do you think? @LarryD Which one looks better to you?
it would help if you said where you are. it looks like OZ, but that's a guess
@Geek_Emeritus
Sorry, my profile says where I am, I didn't know I had to specify in every topic?
Yes, I'm in Queensland, Australia.
What does that have to do with wireless comms?? I thought that these modules would work anywhere in the world that has power....
You asked to the "best". Some are not legal in some places. Some have too much power for some places. Some are on the wrong frequency for some places.
@Paul_KD7HB
Oh wow, I see.
I think this is the law in Australia??
That's the available frequencies in my exact area.
@Paul_KD7HB @LarryD
What about this?
oh, it gets worse that that. ALL of the devices that work on 433.9 mHz in the USA are actually 3rd in line. The military has top priority, all others must give way. Next in priority is radio amateurs. And finally are all the weather stations and others that use 433.9 mHz. They must put up with interference from both military radar and any radio amateur that wants to operate on that frequency. Just because we want to get along with the neighbors means we don't, but could transmit on those frequencies with 1500 watts of power and huge antennas.
@Paul_KD7HB
Will you actually notice interference in a weather station?
Sure. Any close by transmitter will block the receiver with a strong signal, even of a long ways from the weather station frequency. But the weather station will keep trying longer that the interference will last.
@Paul_KD7HB
Post #14
What about it? Get it and try it. Long range is based on marketing. Your results may vary!
@Paul_KD7HB
I don't want to waste my money, so I'm asking what you think.