From f6cfdfe881871ccae66017d9421cd8ea1a730f48 Mon Sep 17 00:00:00 2001
From: todd-herbert <herbert.todd@gmail.com>
Date: Mon, 22 Apr 2024 00:25:12 +1200
Subject: [PATCH] (ESP-32S) Fix "critical error 3" after deep-sleep (#3685)

---
 src/sleep.cpp | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/src/sleep.cpp b/src/sleep.cpp
index a2a221d79..548ef2c54 100644
--- a/src/sleep.cpp
+++ b/src/sleep.cpp
@@ -157,6 +157,10 @@ void initDeepSleep()
         for (uint8_t i = 0; i <= GPIO_NUM_MAX; i++) {
             if (rtc_gpio_is_valid_gpio((gpio_num_t)i))
                 rtc_gpio_hold_dis((gpio_num_t)i);
+
+            // ESP32 (original)
+            else if (GPIO_IS_VALID_OUTPUT_GPIO((gpio_num_t)i))
+                gpio_hold_dis((gpio_num_t)i);
         }
     }
 #endif
@@ -258,14 +262,17 @@ void doDeepSleep(uint32_t msecToWake, bool skipPreflight = false)
     }
 #ifdef BUTTON_PIN
     // Avoid leakage through button pin
-    pinMode(BUTTON_PIN, INPUT);
-    gpio_hold_en((gpio_num_t)BUTTON_PIN);
+    if (GPIO_IS_VALID_OUTPUT_GPIO(BUTTON_PIN)) {
+        pinMode(BUTTON_PIN, INPUT);
+        gpio_hold_en((gpio_num_t)BUTTON_PIN);
+    }
 #endif
-
-    // LoRa CS (RADIO_NSS) needs to stay HIGH, even during deep sleep
-    pinMode(LORA_CS, OUTPUT);
-    digitalWrite(LORA_CS, HIGH);
-    gpio_hold_en((gpio_num_t)LORA_CS);
+    if (GPIO_IS_VALID_OUTPUT_GPIO(LORA_CS)) {
+        // LoRa CS (RADIO_NSS) needs to stay HIGH, even during deep sleep
+        pinMode(LORA_CS, OUTPUT);
+        digitalWrite(LORA_CS, HIGH);
+        gpio_hold_en((gpio_num_t)LORA_CS);
+    }
 #endif
 
 #ifdef HAS_PMU