From 98b4e1ea15c8badd9e701e225dc59a5de12a3824 Mon Sep 17 00:00:00 2001 From: "J. Nick Koston" Date: Fri, 20 Mar 2026 13:57:51 -1000 Subject: [PATCH] [web_server] Increase httpd task stack size to prevent stack overflow (#14997) Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> --- esphome/components/web_server_idf/web_server_idf.cpp | 3 +++ 1 file changed, 3 insertions(+) diff --git a/esphome/components/web_server_idf/web_server_idf.cpp b/esphome/components/web_server_idf/web_server_idf.cpp index f18570965b..45ee711b1e 100644 --- a/esphome/components/web_server_idf/web_server_idf.cpp +++ b/esphome/components/web_server_idf/web_server_idf.cpp @@ -120,7 +120,10 @@ void AsyncWebServer::begin() { if (this->server_) { this->end(); } + // Default httpd stack is defined by ESP-IDF. Increase to accommodate SerializationBuffer's + // 640-byte stack buffer used by web_server JSON request handlers. httpd_config_t config = HTTPD_DEFAULT_CONFIG(); + config.stack_size = config.stack_size + 256; config.server_port = this->port_; config.uri_match_fn = [](const char * /*unused*/, const char * /*unused*/, size_t /*unused*/) { return true; }; // Always enable LRU purging to handle socket exhaustion gracefully.