From 48256d6e9eaa234ad921cb7696072a9e922f8fba Mon Sep 17 00:00:00 2001
From: Garret Kelly <gkelly@gkel.ly>
Date: Tue, 8 Sep 2020 15:22:49 -0400
Subject: [PATCH] Fix compilation without a BUTTON_PIN definition

---
 src/sleep.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/sleep.cpp b/src/sleep.cpp
index 3bce7266..886886b5 100644
--- a/src/sleep.cpp
+++ b/src/sleep.cpp
@@ -284,8 +284,10 @@ esp_sleep_wakeup_cause_t doLightSleep(uint64_t sleepMsec) // FIXME, use a more r
     assert(esp_light_sleep_start() == ESP_OK);
 
     esp_sleep_wakeup_cause_t cause = esp_sleep_get_wakeup_cause();
+#ifdef BUTTON_PIN
     if (cause == ESP_SLEEP_WAKEUP_GPIO)
         DEBUG_MSG("Exit light sleep gpio: btn=%d\n", !digitalRead(BUTTON_PIN));
+#endif
 
     return cause;
 }