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Joined: 31/12/2012
Location: New ZealandPosts: 9995
| Posted: 02:30am 01 Nov 2022 |
If you are already committed to the pole on the roof idea, and if you only need 30M or so, then I would just use the standard helical antenna soldered to the module, put the module with its antenna in the waterproof box, and cable down to your system.
Orient the module inside the case vertically with respect to the antenna, naturally, and mount the box so the HC12 module and antenna inside, are up above the top of the pole, to keep the module and antenna completely in the open, away from any metal. IE: any clamping arrangement to keep the case to the pole, should be BELOW the module and its antenna.
It should SCREAM in there setup like that, even if you wind the HC12 output power right down to about 10mW at the transmitting end. But again, the only way to really find out, is to install it and site-test it.
I encourage you to set all your HC12 modules to FU4 mode, as that greatly increases the performance of the link(very slow on-air data-rate). FU4 is only suitable for relatively small data packets though, so it does depend on if you are only sending sporadic data packets, or trying to stream data continuously from your weather station thing. Technically, I don't think you are supposed to "Stream" on the 433MHz band, so as not to hog the frequency for any other devices that might want to hop onto it, but I don't expect you are trying to stream data, are you Mick? (rhetorical!)
Still looking for the photos. I will upload them when I find them, just so you can see how I hooked up mine.