From 37b694559f6b5c6f2a0e05cc9f5faedd418b797a Mon Sep 17 00:00:00 2001
From: David Cermak <cermak@espressif.com>
Date: Tue, 23 Mar 2021 19:39:37 +0100
Subject: [PATCH] esp_modem: Add option to support for LCP keepalive

Closes https://github.com/espressif/esp-idf/issues/6562
---
 examples/protocols/pppos_client/main/Kconfig.projbuild | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/examples/protocols/pppos_client/main/Kconfig.projbuild b/examples/protocols/pppos_client/main/Kconfig.projbuild
index f0237c6d98..aa8848b7fe 100644
--- a/examples/protocols/pppos_client/main/Kconfig.projbuild
+++ b/examples/protocols/pppos_client/main/Kconfig.projbuild
@@ -54,6 +54,14 @@ menu "Example Configuration"
                 Enter the peer phone number that you want to send message to.
     endif
 
+    config EXAMPLE_LCP_ECHO
+        bool "Enable LCP ECHO"
+        default n
+        select LWIP_ENABLE_LCP_ECHO
+        help
+            Enable this option to make use of LCP keepalive using
+            LCP_ECHO_INTERVAL and LCP_MAXECHOFAILS to default values
+
     menu "UART Configuration"
         config EXAMPLE_MODEM_UART_TX_PIN
             int "TXD Pin Number"