From fa17de7c26ab631119c156daa6640610b7422bec Mon Sep 17 00:00:00 2001
From: Kevin Matz <kevin@company235.com>
Date: Tue, 8 Dec 2020 17:23:26 -0500
Subject: [PATCH] only subscribe to a universe once

---
 wiflash_esp32/sacn.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/wiflash_esp32/sacn.cpp b/wiflash_esp32/sacn.cpp
index cc40b9b..8b2f072 100644
--- a/wiflash_esp32/sacn.cpp
+++ b/wiflash_esp32/sacn.cpp
@@ -35,6 +35,11 @@ ESPAsyncE131::ESPAsyncE131() {
 bool ESPAsyncE131::subscribe(uint16_t num, e131_listen_t type) {
   bool success = false;
 
+  if (universes_.count(num)) {
+    // already subscribed
+    return true;
+  }
+
   switch (type) {
     case E131_UNICAST:
       Serial.println("Unicasting");