Created Basics (markdown)

Basics.md

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+The purpose if this page is to show the basic usage of the library API.
+
+## Using [**RadioShield**](https://github.com/jgromes/RadioShield)
+1. Plug the wireless module into either of the two slots and select the required communication channels/GPIO pins using jumper pins.
+2. In Arduino code, select the slot the module is plugged into. For example, assuming SX1278 module plugged into slot A:  
+  `SX1278 lora = RadioShield.ModuleA;`
+3. After the object is created, the module has to be initialized using the `begin()` method. Typically, this is done in Arduino `setup()` function. If you want to change the module settings, this can be done by providing appropriate values to the `begin()` method.
+4. At this point, your module is ready to send or receive any data you want!
+
+## Standalone Module
+1. Connect the wireless module to the Arduino. This includes connecting the appropriate communication channel (SPI bus or UART) and up to 2 GPIO pins. Any two digital pins can be used for UART and GPIO (unless the GPIO pins are used as external interrupts).
+2. Provide the pin setup to the library. This is done using the `Module` constructor in the following format:  
+  **SPI** modules: `Module(cs, int0, int1)`. For example: `SX1278 lora = new Module(10, 2, 3);`  
+  **UART** modules: `Module(tx, rx)`. For example: `ESP8266 wifi = new Module(10, 9);`
+3. After the object is created, the module has to be initialized using the `begin()` method. Typically, this is done in Arduino `setup()` function. If you want to change the module settings, this can be done by providing appropriate values to the `begin()` method.
+4. At this point, your module is ready to send or receive any data you want!