From 859cca49d19a95ce3329180710cbaaf650ef7ac0 Mon Sep 17 00:00:00 2001
From: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Date: Wed, 2 Mar 2022 16:44:35 +1300
Subject: [PATCH] Only get free memory size from internal (#3259)

---
 esphome/components/json/json_util.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/esphome/components/json/json_util.cpp b/esphome/components/json/json_util.cpp
index 7e88fb6e59..9acba76597 100644
--- a/esphome/components/json/json_util.cpp
+++ b/esphome/components/json/json_util.cpp
@@ -22,7 +22,7 @@ std::string build_json(const json_build_t &f) {
 #ifdef USE_ESP8266
   const size_t free_heap = ESP.getMaxFreeBlockSize() - 2048;  // NOLINT(readability-static-accessed-through-instance)
 #elif defined(USE_ESP32)
-  const size_t free_heap = heap_caps_get_largest_free_block(MALLOC_CAP_DEFAULT) - 2048;
+  const size_t free_heap = heap_caps_get_largest_free_block(MALLOC_CAP_INTERNAL) - 2048;
 #endif
 
   DynamicJsonDocument json_document(free_heap);
@@ -42,7 +42,7 @@ void parse_json(const std::string &data, const json_parse_t &f) {
 #ifdef USE_ESP8266
   const size_t free_heap = ESP.getMaxFreeBlockSize() - 2048;  // NOLINT(readability-static-accessed-through-instance)
 #elif defined(USE_ESP32)
-  const size_t free_heap = heap_caps_get_largest_free_block(MALLOC_CAP_DEFAULT) - 2048;
+  const size_t free_heap = heap_caps_get_largest_free_block(MALLOC_CAP_INTERNAL) - 2048;
 #endif
 
   DynamicJsonDocument json_document(free_heap);