notes.txt

Username: pi
Password: d2Cq0zkISO

Linux setup:

# For ANT USB device, create file /etc/udev/rules.d/garmin-ant2.rules containing the following:
SUBSYSTEM=="usb", ATTRS{idVendor}=="0fcf", ATTRS{idProduct}=="1008", RUN+="/sbin/modprobe usbserial vendor=0x0fcf product=0x1008", MODE="0666", OWNER="pi", GROUP="root"

# To run camera & display from command line, use:
> /usr/bin/raspivid -t 0 -f --mode 5 -ex sports -fps 49 -w 1296 -h 730 --flush

# Allow Pi to be shutdown cleanly by connecting GPIO pin BCM 3 to ground.
# Not needed if detecting button press from Python code.
Add in /boot/config.txt:
  dtoverlay=gpio-shutdown,debounce=1000

# To allow login over serial connection:
Add in /boot/config.txt:
  enable_uart=1          # Enable serial communication to allow login via USB adapter
  dtoverlay=disable-bt   # This is needed to force primary UART (the one on GPIO) to be ttyAMA0/PL011
Then disable bluetooth with:
> sudo systemctl disable hciuart
> sudo systemctl disable bluetooth

# To disable Wi-Fi:
Add in /boot/config.txt:
  dtoverlay=disable-wifi

# To create service:
> sudo mv bikemon.service /lib/systemd/system/
> sudo chmod 644 /lib/systemd/system/bikemon.service
> sudo systemctl daemon-reload
> sudo systemctl enable bikemon


Physical setup:

* Connect button to ground (pin 6) and GPIO 3 (pin 5) for shutdown.
  Connect LED of button to GPIO 14 UART Transmit (pin 8) to have it light up when the Pi is on.


For serial communication using UART-to-USB Bridge:
  * Black ground pin of the Bridge to Pin 6 (GND) of the RPi
  * White RX Pin of the Bridge to Pin 8 (GPIO 14 / TXD) of the RPi
  * Green TX Pin of the Bridge to Pin 10 (GPIO 15 / RXD) of the RPi
  Settings:
   Speed (baud): 115200  (set in device properties)
   Data bits: 8
   Stop bits: 1
   Parity: None
   Flow control: None
  When connecting via PuTTY or MobaXterm, press Enter to get login prompt




Useful commands:

### To check status ###
> systemctl status bikemon


### To see standard out/err ###
> journalctl -u bikemon


### Mount and copy to USB ###
> lsblk -f                                (to find out what USB device name is)
> sudo mkdir /media/usb-drive             (if folder does not already exist)
> sudo mount /dev/sda1 /media/usb-drive   (assuming "sda1" is USB device)
> cp -r ~/Bicycle-Monitor/data /media/usb-drive
> sudo umount /media/usb-drive


### Check temperature of CPU ###
> vcgencmd measure_temp
or
> cat /sys/class/thermal/thermal_zone0/temp


### Check if GPS daemon is running ###
> sudo systemctl status gpsd.socket


### Test/debug GPS daemon ###
> sudo systemctl stop gpsd.socket
> sudo gpsd /dev/ttyUSB1 -F /var/run/gpsd.sock
> cgps
> sudo killall gpsd


### Test video display ###
(currently set as hdmi_group=1, hdmi_mode=16 in /boot/config.txt)
list supported modes:
> tvservice –m CEA
> tvservice –m DMT
show current state:
> tvservice -s


### Bluetooth ###
> sudo modprobe btusb
> service bluetooth status
> service hciuart status

### GPIO and other info (from gpiozero library) ###
> pinout