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sx12xx: add README files for some basic explanation

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Signed-off-by: deadprogram <ron@hybridgroup.com>
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deadprogram
2023-02-01 17:36:10 +01:00
committed by Ron Evans
parent 4de0afc224
commit 9d4847fc6d
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sx127x/README.md
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# SX127x LoRa Radio
This processor comes in several different packages.
## Adafruit LoRa Radio Featherwing
https://www.adafruit.com/product/3231
This is the LoRa 9x @ 900 MHz radio version, which can be used for either 868MHz or 915MHz transmission/reception - the exact radio frequency is determined when you load the software since it can be tuned around dynamically. They can easily go 2 Km line of sight using simple wire antennas, or up to 20Km with directional antennas and settings tweaks.
### Connecting
To use the LoRa Featherwing with a Pybadge/Gobadge, you need to connect some pads on the board itself. Solder some jumper wires as follows:
RST -> A
CS -> B
DIO1 -> C
IRQ -> D
You also need to connect an antenna. The easiest is to cut a small piece of wire to the correct length based on the desired frequency:
EU868 Mhz - 34.54 cm
You can also use a fancier solution such as a uFL SMA connector with matching antenna.