From d0ece33e8e1a2332496509d4008dc1a05e24d6cc Mon Sep 17 00:00:00 2001
From: Kyle Gabriel <kyletgabriel@gmail.com>
Date: Wed, 28 Aug 2019 19:55:30 -0400
Subject: [PATCH] fix error if SINGLE_CHANNEL_GATEWAY not enabled

---
 main/ttn.ino | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/main/ttn.ino b/main/ttn.ino
index a97df43..7d02b34 100644
--- a/main/ttn.ino
+++ b/main/ttn.ino
@@ -73,11 +73,13 @@ void forceTxSingleChannelDr() {
     // Disables all channels, except for the one defined by SINGLE_CHANNEL_GATEWAY
     // This only affects uplinks; for downlinks the default
     // channels or the configuration from the OTAA Join Accept are used.
+    #ifdef SINGLE_CHANNEL_GATEWAY
     for(int i=0; i<9; i++) { // For EU; for US use i<71
         if(i != SINGLE_CHANNEL_GATEWAY) {
             LMIC_disableChannel(i);
         }
     }
+    #endif
 
     // Set data rate (SF) and transmit power for uplink
     LMIC_setDrTxpow(LORAWAN_SF, 14);