From b9ddcac88db9faa084ef04dc9f52e194be8854aa Mon Sep 17 00:00:00 2001
From: Matthias Prinke <83612361+matthias-bs@users.noreply.github.com>
Date: Tue, 20 Aug 2024 21:41:20 +0200
Subject: [PATCH] Replaced delay() with light sleep for ESP32 (#99)

---
 BresserWeatherSensorLWCmd.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/BresserWeatherSensorLWCmd.cpp b/BresserWeatherSensorLWCmd.cpp
index e38ffe9..cb6ccbb 100644
--- a/BresserWeatherSensorLWCmd.cpp
+++ b/BresserWeatherSensorLWCmd.cpp
@@ -36,6 +36,7 @@
 //
 // 20240723 Extracted from BresserWeatherSensorLW.ino
 // 20240729 Added PowerFeather specific status information
+// 20240818 Replaced delay() with light sleep for ESP32
 //
 // ToDo:
 // -
@@ -300,7 +301,12 @@ void sendCfgUplink(uint8_t uplinkReq, uint32_t uplinkInterval)
   uint32_t delayMs = max(interval, minimumDelay); // cannot send faster than duty cycle allows
 
   log_d("Sending configuration uplink in %u s", delayMs / 1000);
+  #if defined(ESP32)
+  esp_sleep_enable_timer_wakeup(delayMs * 1000);
+  esp_light_sleep_start();
+  #else
   delay(delayMs);
+  #endif
   log_d("Sending configuration uplink now.");
   int16_t state = node.sendReceive(uplinkPayload, encoder.getLength(), port);
   debug((state != RADIOLIB_LORAWAN_NO_DOWNLINK) && (state != RADIOLIB_ERR_NONE), "Error in sendReceive", state, false);