Setup IC880A-SPI (LoRaWAN concentrator) on Raspberry Pi 3

Configure Raspberry Pi

1. Install Rasbian OS on Raspberry Pi

The official installation guide is available at: https://www.raspberrypi.org/documentation/installation/installing-images/README.md

- First, we download the image file from: https://www.raspberrypi.org/downloads/
- Once we have the image file, we can install it into Raspberry Pi SD card with “Etcher”:
 . Etcher is a graphical SD card writing tool.
 . Download and install Etcher from: https://etcher.io/
 . Connect an SD card reader with the SD card inside.
 . Open Etcher and select from your hard drive the Raspberry Pi “.img” or “.zip” file you wish to write to the SD card.
 . Select the SD card you wish to write your image to.
 . Review your selections and click 'Flash!' to begin writing data to the SD card.
- Once we wrote the image file into the SD card. We can mount the SD card into Raspberry Pi. And boot up the OS by connecting the power supply to power socket.

2. Configure Local time

We need to configure the Raspberry Pi local. So that the LoRaWAN software is can access to the correct time.

- Type sudo raspi-config
- Choose Internationalisation Options
- And configure your local time and time zone 

3. Enable SPI Interface

- sudo raspi-config
- Select “Advanced Options”
- Select the “SPI” option
- Set the option to “Yes”

Connect IC880A-SPI to Raspberry Pi

Additional document: https://github.com/ttn-zh/ic880a-gateway/wiki

In order to connect the IC880A-SPI to Raspberry Pi the following PIN on IC880A-SPI have to be connected.

PIN on IC880A-SPI

PIN	PIN Name	PIN Type	Description
21	VDD	Power	"+5 V Supply Voltage(>700mA)"
22	GND	Power
14	CLK	Input	Sx1301 SPI-Clock
15	MISO	Output	Sx1301 SPI-MISO
16	MOSI	Input	Sx1301 SPI-MOSI
17	NSS	Input	Sx1301 SPI-NSS
13	Reset	Reset	Sx1301 SPI-reset
12	GND	Power

We use the LoRaWAN software from GitHub and the PIN we need to connect to on Raspberry Pi is the following:

IC880A-SPI to Raspberry Pi

IC880A	Name	Raspberry Pi (Physical PIN)
21	Supply 5V	2
22	GND	6
13	Reset	22
14	SPI CLK	23
15	MISO	21
16	MOSI	19
17	NSS	24