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--- server_status_oled_display [2025/03/24 20:53] – kenson
+++ server_status_oled_display [2026/05/06 04:56] (current) – kenson
@@ Line 12: / Line 12: @@
   * The OLED's I2C address 0x3C, and I'm using adafruit's 1306 driver, mainly for display rotation support.
   * The Accelerometer's address is 0x1C and the adafruit MMA8541 driver is basic but functional. Note that the more advanced features (e.g. tap to click) built into the chip are unavailable with this library.
+====== TLDR; ======
+Probe the port.
+<code>
+sudo tee ./probe_displayinator.py >/dev/null <<'EOF'
+#!/usr/bin/env bash
+set -u
+BAUD=115200
+for PORT in /dev/ttyUSB* /dev/ttyACM*; do
+    [ -e "$PORT" ] || continue
+    echo "========================================"
+    echo "Probing $PORT"
+    if ! stty -F "$PORT" "$BAUD" raw -echo -echoe -echok -echoctl -echoke 2>/dev/null; then
+        echo "Could not configure $PORT"
+        continue
+    fi
+    # Some Arduino/32U4-style boards reset when serial opens
+    sleep 4
+    # Wake / clear any stale output
+    printf '\n' > "$PORT"
+    sleep 0.2
+    timeout 1 cat "$PORT" >/dev/null 2>&1
+    # Ask version
+    printf '!VER\n' > "$PORT"
+    echo "Response from $PORT:"
+    timeout 2 cat "$PORT" || true
+    echo
+done
+EOF
+chmod +x probe_displayinator.py
+./probe_displayinator.py
+</code>
+Download the agent: {{ :displayinatorhostip.zip |}}
+<code>
+wget 'https://mehngineering.com/wiki/lib/exe/fetch.php?media=displayinatorhostip.zip' -O displayinatorhostip.zip
+unzip displayinatorhostip.zip
+</code>
+Insert the service to autostart
+<code>
+sudo tee /etc/systemd/system/displayinator.service >/dev/null <<'EOF'
+[Unit]
+Description=Displayinator Host IP Sender
+Wants=network-online.target
+After=network-online.target multi-user.target
+[Service]
+Type=oneshot
+WorkingDirectory=/root
+ExecStartPre=/bin/sleep 10
+ExecStart=/usr/bin/python3 /root/DisplayinatorHostIP.py --port /dev/ttyACM0
+StandardOutput=append:/var/log/displayinator-hostip.log
+StandardError=append:/var/log/displayinator-hostip.log
+[Install]
+WantedBy=multi-user.target
+EOF
+</code>
+Edit /etc/systemd/system/displayinator.service and change the port to whatever device the probe finds, usually /dev/ttyACM0 or /dev/ttyUSB0
+<code>ExecStart=/usr/bin/python3 /root/DisplayinatorHostIP.py --port /dev/ttyACM0
+</code>
+Start the service.
+<code>
+systemctl daemon-reload
+systemctl enable --now displayinator.service
+systemctl status displayinator.service
+</code>
 ==== Loading the Arduino Bootloader ====