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Hardware and Software Setup Instructions.md

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Hardware and Software Setup Instructions

Parts List

Receiver Node(s) (this list makes one node, build up to eight)

  • 1 x Arduino Nano
  • 1 x rx5808 with SPI mod (Receivers with date code 20120322 are known to work).
  • 3 x 1k ohm resistor
  • 1 x 100k ohm resistor
  • 26 AWG and 30 AWG silicone wire

System Components

  • 1 x Raspberry Pi3 (Pi2 users have reported issues with multiple nodes connected)
  • 8 GB (minimum) Micro SD Card
  • 26 AWG and 30 AWG silicone wire (for wiring to each receiver node)
  • 3D printed case for housing the electronics
  • 5V power supply, 3 amp minimum

Additional Components

  • Ethernet cable, 50ft plus
  • Outdoor power cable, 50ft plus
  • Network router
  • Laptop/tablet
  • ws2812b LEDs

Hardware Setup

RX5808 Video Receivers

Modify the rx5808 receivers to use SPI.

Remove the shield from the rx5808, the shield is normally held on by a few spots of solder around the edges. Use some solder wick to remove the solder and free the shield from the receiver. Be careful not to damage any ground pads on the receiver. There are usually small holes around the edge you can use to help push off the shield.

Remove the following resistor: rx5808 spi mod

The sheild should be soldered back in place after removing the resistor.

Receiver Nodes

Complete wiring connections between each Arduino and RX5808. receiver node wiring

System Assembly

Complete wiring connections between each Arduino and the Raspberry Pi.

Note: be sure all Receiver Nodes and the Raspberry Pi are tied to a common ground; if not, the i2c messages can be corrupted. system wiring

WS2812b LED Support

The pins in the green box is what were already used by the timer. The pins in the red box is where you connect the signal and ground from the ws2812b LEDs. The LEDs will require a separate power source. See WS2812b LED support under Software Setup. led wiring

Software Setup

Receiver Nodes (Arduinos)

Note: The latest Arduino IDE (1.8+) is required from https://www.arduino.cc/en/Main/Software

Open '/delta5_race_timer/src/delta5node/delta5node.ino' in the Arduino IDE.

Configure the '#define i2cSlaveAddress' line of the .ino for each node before uploading.

// Node Setup -- Set the i2c address here
// Node 1 = 8, Node 2 = 10, Node 3 = 12, Node 4 = 14
// Node 5 = 16, Node 6 = 18, Node 7 = 20, Node 8 = 22
#define i2cSlaveAddress 8

System (Raspberry Pi)

Start by installing Raspbian, follow the official instructions here: https://www.raspberrypi.org/downloads/raspbian/, use 'RASPBIAN JESSIE WITH PIXEL'

Enable I2C on the Raspberry Pi, go to 'Advanced Options' and enable I2C.

sudo raspi-config

Install python and the python drivers for the GPIO.

sudo apt-get install python-dev
sudo apt-get install python-rpi.gpio

Final system update and upgrade.

sudo apt-get update && sudo apt-get upgrade

Clone or download this repo to '/home/pi/' on the Raspberry Pi.

Install web server packages, open a terminal in '/home/pi/delta5_race_timer/src/delta5server' and run

sudo pip install -r requirements.txt

Update i2c baud rate

sudo nano /boot/config.txt

add the following line:

dtparam=i2c_baudrate=75000

Save and exit the file with Ctrl-x

Starting the System

The following instructions will start the Delta5 Race Timer web server on the raspberry pi allowing full control and configuration of the system to run races and save lap times.

Alternatively, to use your Delta5 Race Timer hardware with 3rd party timing software, replace each reference of 'delta5server' with 'timingserver' in the following instructions.

Manual Start

Open a terminal in '/delta5_race_timer/src/delta5server' and run

python server.py

Start on Boot

Create a service

sudo nano /lib/systemd/system/delta5.service

with the following contents

[Unit]
Description=Delta5 Server
After=multi-user.target

[Service]
WorkingDirectory=/home/pi/delta5_race_timer/src/delta5server
ExecStart=/usr/bin/python server.py

[Install]
WantedBy=multi-user.target

save and exit (CTRL-X, Y, ENTER).

Update permissions.

sudo chmod 644 /lib/systemd/system/delta5.service

Start on boot commands.

sudo systemctl daemon-reload
sudo systemctl enable delta5.service
sudo reboot

WS2812b LED Support

The ws2812b controls are provided by the following project: https://github.com/jgarff/rpi_ws281x

Perform an update and install the dependencies:

sudo apt-get update
sudo apt-get install build-essential python-dev git scons swig

Clone the repository onto the Pi and initiate Scons:

sudo git clone https://github.com/jgarff/rpi_ws281x.git
cd rpi_ws281x
sudo scons

Install the Python library:

cd python
sudo python setup.py install

Modify the config.txt file

sudo nano /boot/config.txt

add the following to the config.txt file

core_freq=250

Configure the Raspberry Pi to enable SPI

sudo raspi-config

Select 5 Interfacing Options

Select P4 SPI

and enable SPI

Reboot the Raspberry Pi

sudo reboot