Difference between revisions of "Dragino Lora/GPS HAT"

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(presentation)
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===Gateway===
 
===Gateway===
 
* https://github.com/tftelkamp/single_chan_pkt_fwd
 
* https://github.com/tftelkamp/single_chan_pkt_fwd
 +
* To compile/install it:
 +
{| class="wikitable"
 +
|-
 +
! Buildroot !! Debian
 +
|-
 +
|
 
<pre class="host">
 
<pre class="host">
−
Compile it under Buildroot:
 
 
$ make lora-forwarder
 
$ make lora-forwarder
−
 
−
Compile it under Debian (as_devices library is needed):
 
−
# git clone https://github.com/tftelkamp/single_chan_pkt_fwd.git
 
−
# make CFLAGS="-c -Wall -I/usr/include/as_devices/" LIBS="-las_devices"
 
 
</pre>
 
</pre>
 +
||
 +
* [[AsDevices]] library (0.18+) is needed. Then:
 +
<pre class="apf">
 +
root@opos6ul:~# git clone https://github.com/tftelkamp/single_chan_pkt_fwd.git
 +
root@opos6ul:~# make CFLAGS="-c -Wall -I/usr/include/as_devices/" LIBS="-las_devices"
 +
</pre>
 +
|}
  
 
<pre class="apf">
 
<pre class="apf">
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# echo in > /sys/class/gpio/gpio9/direction
 
# echo in > /sys/class/gpio/gpio9/direction
 
</pre>
 
</pre>
−
* to get & printout UDP data from gateway:
+
* To get & printout UDP data received by gateway:
 
<source lang="python">
 
<source lang="python">
 
#!/usr/bin/python
 
#!/usr/bin/python

Revision as of 17:36, 29 March 2017

Instructions to use the Dragino Lora/GPS HAT on OPOS6ULDev (thanks to RaspberryPi™ compatible connector).

[1]

LoRa™

Setup

  • RESET is connected to RPi GPIO0 which is gpio24 on OPOS6UL set as output
  • nSS is connected to RPi GPIO6, which is gpio97 on OPOS6UL set as output
  • DIO0 is connected to RPi GPIO7, which is gpio10 on OPOS6UL set as input
  • on recent models (like the one we tested) DIO1 is connected to RPi GPIO4, which is gpio18 on OPOS6UL set as input
  • on recent models (like the one we tested) DIO1 is connected to RPi GPIO5, which is gpio19 on OPOS6UL set as input
  • This Hat/Shield is using HOPERF RFM96W module (clone of Semtech's SX1276 ?) which is controlled through SPI bus.
# modprobe spidev

Testing that chip is recognized with python spidev

  • Bring chip out of reset:
# echo 24 > /sys/class/gpio/export
# echo out > /sys/class/gpio/gpio24/direction
# echo 0 > /sys/class/gpio/gpio24/value
# echo 1 > /sys/class/gpio/gpio24/value
  • activate it:
# echo 97 > /sys/class/gpio/export
# echo out > /sys/class/gpio/gpio97/direction
# echo 0 > /sys/class/gpio/gpio97/value
  • read ID (register 0x42):
import spidev

spi = spidev.SpiDev()
spi.open(3,0)
to_send=[0x42,0x00]
spi.xfer(to_send)
[255, 255]

Tested Software

Gateway

Buildroot Debian 
$ make lora-forwarder

root@opos6ul:~# git clone https://github.com/tftelkamp/single_chan_pkt_fwd.git
root@opos6ul:~# make CFLAGS="-c -Wall -I/usr/include/as_devices/" LIBS="-las_devices"

# modprobe spidev
# echo 9 > /sys/class/gpio/export
# echo 24 > /sys/class/gpio/export
# echo 97 > /sys/class/gpio/export
# echo out > /sys/class/gpio/gpio97/direction
# echo out > /sys/class/gpio/gpio24/direction
# echo in > /sys/class/gpio/gpio9/direction
  • To get & printout UDP data received by gateway:
#!/usr/bin/python

import socket

UDP_IP = "192.168.1.28"
UDP_PORT = 1700

sock = socket.socket(socket.AF_INET, # Internet
                     socket.SOCK_DGRAM) # UDP
sock.bind((UDP_IP, UDP_PORT))

while True:
	data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
	print "received message:", data

Node

 To compile it on Buildroot:
$ make lmic-pi

 To compile it on Debian:
# wget https://github.com/ernstdevreede/lmic_pi/archive/master.zip
# unzip master.zip 
# cd lmic_pi-master/lmic
# make CFLAGS="-c -Wall -I/usr/include/as_devices/" LIBS="-las_devices"
# cd ../examples/thethingsnetwork-send-v1/
# make CFLAGS="-Wall -I/usr/include/as_devices/ -I../../lmic" LDFLAGS="-las_devices"
# chmod a+x thethingsnetwork-send-v1

# modprobe spidev
# echo 9 > /sys/class/gpio/export
# echo 18 > /sys/class/gpio/export
# echo 19 > /sys/class/gpio/export
# echo 24 > /sys/class/gpio/export
# echo 97 > /sys/class/gpio/export
# echo out > /sys/class/gpio/gpio97/direction 
# echo out > /sys/class/gpio/gpio24/direction 
# echo in > /sys/class/gpio/gpio9/direction
# echo in > /sys/class/gpio/gpio18/direction
# echo in > /sys/class/gpio/gpio19/direction

GPS

Links


LoRa is a registered trademark of Semtech.

RaspberryPi is a registered trademark of RaspberryPi Foundation.

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