From 7e27e98bff376a237b8911e87d0d44d5cd6648be Mon Sep 17 00:00:00 2001
From: Edward Firmo <94725493+edwardtfn@users.noreply.github.com>
Date: Mon, 23 Oct 2023 21:02:57 +0200
Subject: [PATCH] set Nextion protocol reparse mode (#5484)

---
 esphome/components/nextion/nextion.h          |  7 +++++++
 .../components/nextion/nextion_commands.cpp   | 19 +++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/esphome/components/nextion/nextion.h b/esphome/components/nextion/nextion.h
index 28663138d7..7518d7f4cb 100644
--- a/esphome/components/nextion/nextion.h
+++ b/esphome/components/nextion/nextion.h
@@ -623,6 +623,13 @@ class Nextion : public NextionBase, public PollingComponent, public uart::UARTDe
    * @param True or false. Sleep=true to enter sleep mode or sleep=false to exit sleep mode.
    */
   void sleep(bool sleep);
+  /**
+   * Sets Nextion Protocol Reparse mode between active or passive
+   * @param True or false.
+   * active_mode=true to enter active protocol reparse mode
+   * active_mode=false to enter passive protocol reparse mode.
+   */
+  void set_protocol_reparse_mode(bool active_mode);
 
   // ========== INTERNAL METHODS ==========
   // (In most use cases you won't need these)
diff --git a/esphome/components/nextion/nextion_commands.cpp b/esphome/components/nextion/nextion_commands.cpp
index 806e03850f..c4caf29287 100644
--- a/esphome/components/nextion/nextion_commands.cpp
+++ b/esphome/components/nextion/nextion_commands.cpp
@@ -32,6 +32,25 @@ void Nextion::sleep(bool sleep) {
 }
 // End sleep safe commands
 
+// Protocol reparse mode
+void Nextion::set_protocol_reparse_mode(bool active_mode) {
+  const uint8_t to_send[3] = {0xFF, 0xFF, 0xFF};
+  if (active_mode) {  // Sets active protocol reparse mode
+    this->write_str(
+        "recmod=1");  // send_command_ cannot be used as Nextion might not be setup if incorrect reparse mode
+    this->write_array(to_send, sizeof(to_send));
+  } else {                                        // Sets passive protocol reparse mode
+    this->write_str("DRAKJHSUYDGBNCJHGJKSHBDN");  // To exit active reparse mode this sequence must be sent
+    this->write_array(to_send, sizeof(to_send));
+    this->write_str("recmod=0");  // Sending recmode=0 twice is recommended
+    this->write_array(to_send, sizeof(to_send));
+    this->write_str("recmod=0");
+    this->write_array(to_send, sizeof(to_send));
+  }
+  this->write_str("connect");
+  this->write_array(to_send, sizeof(to_send));
+}
+
 // Set Colors
 void Nextion::set_component_background_color(const char *component, uint32_t color) {
   this->add_no_result_to_queue_with_printf_("set_component_background_color", "%s.bco=%d", component, color);