From bf97a1f2d33a34bb24088fc7e636bd9de8c95085 Mon Sep 17 00:00:00 2001
From: nicolasimeoni <32333383+nicolasimeoni@users.noreply.github.com>
Date: Tue, 5 Feb 2019 18:30:10 +0100
Subject: [PATCH] Update _loraModem.ino

Modified loraWait() to avoid hangs when tmst is in the past
---
 ESP-sc-gway/_loraModem.ino | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ESP-sc-gway/_loraModem.ino b/ESP-sc-gway/_loraModem.ino
index 0d0c45b..a13eaca 100644
--- a/ESP-sc-gway/_loraModem.ino
+++ b/ESP-sc-gway/_loraModem.ino
@@ -647,7 +647,8 @@ void loraWait(const uint32_t timestamp)
 	}
 	tmst = tmst + txDelay + adjust;						// tmst based on txDelay and spreading factor
 	uint32_t waitTime = tmst - micros();
-	if (waitTime<0) {
+//	if (waitTime<0) { //uint32_t is never negative! If micros() is > tmst, waitTime assume a very big value and the app hangs
+	if (micros()>tmst) { // test if the tmst is in the past to avoid hangs
 		Serial.println(F("loraWait:: Error wait time < 0"));
 		return;
 	}