====== LoRaWAN Gateway auf dem Raspberry Pi 3 ======
===== Hardware =====
  * [[https://www.raspberrypi.com/products/raspberry-pi-3-model-b-plus/|Raspberry Pi 3 B+]]
  * [[https://www.seeedstudio.com/WM1302-Pi-Hat-p-4897.html|WM1302 Raspberry Pi Hat]]
  * [[https://www.seeedstudio.com/UF-L-SMA-K-1-13-120mm-p-5046.html|SMA to I-PEX Antenna Cable - 120mm]]
  * [[https://www.berrybase.de/waveshare-lpwa-lora-antenne-868mhz-5dbi-vertikal-sma-male-ip65-magnetfuss-50-ohm-10w|Waveshare LPWA Lora Antenne, 868MHz, 5dBi, vertikal, SMA Male, IP65, Magnetfuß, 50 Ohm, 10W]]
  * [[https://www.seeedstudio.com/WM1302-LoRaWAN-Gateway-Module-USB-EU868-p-4892.html|Wio-WM1302 Long Range Gateway Module(USB) - EU868]]
  * [[https://www.seeedstudio.com/WM1302-LoRaWAN-Gateway-Module-SPI-EU868-p-4889.html|Wio-WM1302 Long Range Gateway Module(SPI) - EU868]]
  * [[https://wiki.seeedstudio.com/WM1302_module/|Seeed Studio Wiki zum LoRaWAN® Gateway Modul WM1302]]
  * [[https://github.com/Lora-net/sx1302_hal/issues/116|Issue with GPS Synchronization in LoRa Packet Forwarder-waveshare SX1302 pi Hat #116|Issue with GPS Synchronization in LoRa Packet Forwarder-waveshare SX1302 pi Hat #116]]

===== Installation =====
Die Installation erfolgt nach WIKI.
<code>
sudo apt update
sudo apt install -y git
cd ~
git clone https://github.com/Lora-net/sx1302_hal
# 
cd ~/sx1302_hal
make
</code>

==== Bugfix für GPS Synchronisation ====
<code>
libloragw/src/loragw_gps.c:
832        if (nb_fields != 13) {
#
Change that to:
832        if ( (nb_fields != 13) && (nb_fields != 14) ) {
# This change will accept NMEA G?RMC messages with 13 or 14 fields, not only those with 13 as before. The L76K receiver apparently defaults to sending 14-field-messages.
</code>

==== Bugfix für "Transmit downlink data packets" ====
Siehe Seeed Studio Wiki FAQ: "Why my devices can not join the network server even if all the settings are correct?"
<code>
mcedit /sx1302_hal/packet_forwarder/src/jitqueue.c
# change TX_JIT_DELAY  from 40000 to 120000
##define TX_JIT_DELAY            40000   /* Pre-delay to program packet for TX in microseconds */
#define TX_JIT_DELAY            120000   /* Pre-delay to program packet for TX in microseconds */
</code>

==== SystemD Service ====
Den LoRaWAN Packet Forwarder als Systemd Service starten:
<code>
sudo touch /etc/systemd/system/loragateway.service
sudo mcedit /etc/systemd/system/loragateway.service
</code>
<code | loragateway.service >
[Unit]
Description=WM1302 LoRaWAN Gateway Service
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
User=root
WorkingDirectory=/home/christoph/sx1302_hal/packet_forwarder
#ExecStartPre=/bin/sh -c '/home/pi/sx1302_hal/tools/reset_lgw.sh start'
ExecStart=/home/christoph/sx1302_hal/packet_forwarder/lora_pkt_fwd -c /home/christoph/sx1302_hal/packet_forwarder/global_conf.json.sx1250.EU868.USB > /dev/null 2>&1
Restart=on-failure
RestartSec=10

[Install]
WantedBy=multi-user.target
</code>

==== Geräte-ID (Concentrator EUI) auslesen ====
<code>
./sx1302_hal/util_chip_id/chip_id -u -d /dev/ttyACM0
Opening USB communication interface
INFO: Configuring TTY
INFO: Flushing TTY
INFO: Setting TTY in blocking mode
INFO: Connect to MCU
INFO: Concentrator MCU version is V01.00.00
INFO: MCU status: sys_time:85510 temperature:40.4oC
Note: chip version is 0x10 (v1.0)
INFO: using legacy timestamp
ARB: dual demodulation disabled for all SF

INFO: concentrator EUI: 0x<16-stellige-EUI>

Closing USB communication interface
</code>