From f4e8a8972635bd99c72b47a69cde7c6a19cf61bb Mon Sep 17 00:00:00 2001
From: Jimmy Hedman <jimmy.hedman@gmail.com>
Date: Mon, 1 Apr 2024 01:40:11 +0200
Subject: [PATCH] IPv6 string representation follows RFC5952 (#6449)

---
 esphome/components/network/ip_address.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/esphome/components/network/ip_address.h b/esphome/components/network/ip_address.h
index b02c358a77..30a426e458 100644
--- a/esphome/components/network/ip_address.h
+++ b/esphome/components/network/ip_address.h
@@ -4,6 +4,7 @@
 #include <cstdio>
 #include <array>
 #include "esphome/core/macros.h"
+#include "esphome/core/helpers.h"
 
 #if defined(USE_ESP_IDF) || defined(USE_LIBRETINY) || USE_ARDUINO_VERSION_CODE > VERSION_CODE(3, 0, 0)
 #include <lwip/ip_addr.h>
@@ -116,7 +117,7 @@ struct IPAddress {
   bool is_set() { return !ip_addr_isany(&ip_addr_); }
   bool is_ip4() { return IP_IS_V4(&ip_addr_); }
   bool is_ip6() { return IP_IS_V6(&ip_addr_); }
-  std::string str() const { return ipaddr_ntoa(&ip_addr_); }
+  std::string str() const { return str_lower_case(ipaddr_ntoa(&ip_addr_)); }
   bool operator==(const IPAddress &other) const { return ip_addr_cmp(&ip_addr_, &other.ip_addr_); }
   bool operator!=(const IPAddress &other) const { return !ip_addr_cmp(&ip_addr_, &other.ip_addr_); }
   IPAddress &operator+=(uint8_t increase) {