From f0297e56bbee016a33841c8afdd9d8173fa8cb00 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Tue, 30 Mar 2021 12:23:21 -0400
Subject: [PATCH] added GPIO 13 Wiring Pi 23 check for VHF BPF

---
 afsk/main.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/afsk/main.c b/afsk/main.c
index 7bbb728e..ef6d95d6 100644
--- a/afsk/main.c
+++ b/afsk/main.c
@@ -302,7 +302,21 @@ mode = AFSK;
           onLedOn = HIGH;
           onLedOff = LOW;
           transmit = TRUE;
-        }
+        } else {
+       	pinMode(23, INPUT);
+        pullUpDnControl(23, PUD_UP);
+
+        if (digitalRead(23) != HIGH) {
+          printf("vB5 Present with VHF BPF\n");
+          txLed = 2;
+          txLedOn = HIGH;
+          txLedOff = LOW;
+          vB5 = TRUE;
+          onLed = 27;
+          onLedOn = HIGH;
+          onLedOff = LOW;
+          transmit = TRUE;
+	}
       }
     }
   }