projects:commerce_st [wiki]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
===== Electric Chameleons =====
  * [[https://huggingface.co/spaces/r3gm/Audio_separator|This audio separator]] works really well separating environmental noise and ported over OK to a local Jetson machine
    * licensed under [[https://opensource.org/license/mit|MIT license]]

==== Controlling Beaglebone Black ====
  * change parameters for stepper motor (read by ''pinPulse.sh'')
<code bash>
sshpass -p yourpassword ssh debian@beaglebone.local "echo 0.5 > /home/debian/pulse_on"
sshpass -p yourpassword ssh debian@beaglebone.local "echo 2 > /home/debian/pulse_off"
</code>
  * LED strip test
<code python>
import socket, struct, time, sys
ipAddr = sys.argv[1]
NUM_PIXELS = 16

pixels = bytes([255, 0, 0] * NUM_PIXELS) # RED
header = struct.pack('>BBH', 0, 0, len(pixels))
packet = header + pixels
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.sendto(packet, (ipAddr, 7891))
time.sleep(0.05)
s.sendto(packet, (ipAddr, 7891))
</code>
  * led strip fade test
<code python>
import socket, struct, time, math, sys
ipAddr = sys.argv[1]

NUM_PIXELS = 16
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# Prime the buffer
pixels = bytes([255, 0, 0] * NUM_PIXELS)
header = struct.pack('>BBH', 0, 0, len(pixels))
s.sendto(header + pixels, (ipAddr, 7891))
time.sleep(0.05)

# Now update continuously
i = 0
while True:
    r = int((math.sin(i * 0.05) + 1) * 127)
    pixels = bytes([r, 0, 0] * NUM_PIXELS)
    header = struct.pack('>BBH', 0, 0, len(pixels))
    s.sendto(header + pixels, (ipAddr, 7891))
    time.sleep(0.033)
    i += 1
</code>
==== BBB config ====
  * change # of LEDs in strip by editing ''/etc/ledscape-config.json''
  * flash sdcard to emmc
    * optional: make sure the sdcard is healthy. When **not** mounted (example): ''sudo fsck.ext4 -f /dev/sda1''
    * boot BB from sdcard then: ''sudo /opt/scripts/tools/eMMC/bbb-eMMC-flasher-eewiki-ext4.sh''

=== BBB issues ===
  * jack is failing overnight. There was a solution built into the whisphering woodlands project I think?
    * the solution is to set up a cronjob that runs every 5 minutes and reboots the BB if jack fails: ''restartIfJackIsJacked.sh''
<code bash>
#!/bin/bash
process="jackd"

cpuUsage=$(top -bn2 -p $(pgrep $process) | grep $process | tail -n 1 | awk {'print $9;'} | cut -f1 -d'.')
# echo $cpuUsage
if [ "$cpuUsage" -gt "80" ]; then
        echo "PUTPASSWORDHEREYESIKNOWTHISISNOTSECURE" | sudo -S reboot
fi
</code>