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--- projects:commerce_st [2025/03/05 14:20] – John Harrison
+++ projects:commerce_st [2026/06/29 22:04] (current) – John Harrison
@@ Line 2: / Line 2: @@
   * [[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>