From 04d965d67a7264a1c7c211494aebda1953df7603 Mon Sep 17 00:00:00 2001
From: "info@mode42.com" <info@mode42.com>
Date: Fri, 7 Aug 2026 18:25:13 +0000
Subject: Initial push

---
 stacks/tncs/pktnc2-to-hybbx.sh | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100755 stacks/tncs/pktnc2-to-hybbx.sh

(limited to 'stacks/tncs/pktnc2-to-hybbx.sh')

diff --git a/stacks/tncs/pktnc2-to-hybbx.sh b/stacks/tncs/pktnc2-to-hybbx.sh
new file mode 100755
index 0000000..0444b5f
--- /dev/null
+++ b/stacks/tncs/pktnc2-to-hybbx.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+# AX.25 UI frame PK-TNC2 -> HyBBX/TNC2C over the air.
+# HyBBX must be running on Unit A (ttyS4). PK-TNC2: boot-wait first.
+#
+# Usage: ./pktnc2-to-hybbx.sh [message] [src] [dst]
+# Default: "CONNECT" CB-0-2 CB-0
+
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")" && pwd)"
+# shellcheck source=/dev/null
+source "$ROOT/pktnc2-serial.env"
+
+MSG="${1:-CONNECT}"
+SRC="${2:-CB-0-2}"
+DST="${3:-CB-0}"
+
+if pgrep -x hybbx >/dev/null && fuser -s "$TNC_DEV" 2>/dev/null; then
+    echo "WARN: HyBBX may hold ttyS5 - only ttyS4 should be active" >&2
+fi
+
+echo "ON-AIR TX: $SRC -> $DST: $MSG"
+echo "Radio: both on same MHz (e.g. 27.235 K24), SQ closed before TX"
+export TNC2C_DEV="$TNC_DEV" TNC2C_BAUD="$TNC_BAUD" TNC2C_LINE="$TNC_LINE"
+exec "$ROOT/tnc2c-send-test.sh" "$MSG" "$SRC" "$DST"
-- 
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