diff --git a/esphome/components/e131/e131.cpp b/esphome/components/e131/e131.cpp
index d107d9f9fc..8a293e9067 100644
--- a/esphome/components/e131/e131.cpp
+++ b/esphome/components/e131/e131.cpp
@@ -31,6 +31,7 @@ void E131Component::setup() {
   if (!udp_->begin(PORT)) {
     ESP_LOGE(TAG, "Cannot bind E131 to %d.", PORT);
     mark_failed();
+    return;
   }
 
   join_igmp_groups_();
diff --git a/esphome/components/wled/wled_light_effect.cpp b/esphome/components/wled/wled_light_effect.cpp
index f161ea15e8..e06a23aacf 100644
--- a/esphome/components/wled/wled_light_effect.cpp
+++ b/esphome/components/wled/wled_light_effect.cpp
@@ -50,12 +50,13 @@ void WLEDLightEffect::apply(light::AddressableLight &it, const light::ESPColor &
     udp_.reset(new WiFiUDP());
 
     if (!udp_->begin(port_)) {
-      ESP_LOGE(TAG, "Cannot bind WLEDLightEffect to %d.", port_);
+      ESP_LOGW(TAG, "Cannot bind WLEDLightEffect to %d.", port_);
+      return;
     }
   }
 
+  std::vector<uint8_t> payload;
   while (uint16_t packet_size = udp_->parsePacket()) {
-    std::vector<uint8_t> payload;
     payload.resize(packet_size);
 
     if (!udp_->read(&payload[0], payload.size())) {
@@ -63,11 +64,12 @@ void WLEDLightEffect::apply(light::AddressableLight &it, const light::ESPColor &
     }
 
     if (!this->parse_frame_(it, &payload[0], payload.size())) {
-      ESP_LOGD(TAG, "Frame: Invalid (size=%zu, first=%c/%d).", payload.size(), payload[0], payload[0]);
+      ESP_LOGD(TAG, "Frame: Invalid (size=%zu, first=0x%02X).", payload.size(), payload[0]);
       continue;
     }
   }
 
+  // FIXME: Use roll-over safe arithmetic
   if (blank_at_ < millis()) {
     blank_all_leds_(it);
     blank_at_ = millis() + DEFAULT_BLANK_TIME;