From 3149c335fbefd61d706544ecb1415dd79d8b9c92 Mon Sep 17 00:00:00 2001
From: Volodymyr Shymanskyy <vshymanskyi@gmail.com>
Date: Mon, 25 Sep 2017 12:06:18 +0300
Subject: [PATCH] Fix isGprsConnected() for SIM8xx

---
 TinyGsmClientSIM800.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/TinyGsmClientSIM800.h b/TinyGsmClientSIM800.h
index 7e1a52c..0daaba7 100644
--- a/TinyGsmClientSIM800.h
+++ b/TinyGsmClientSIM800.h
@@ -524,7 +524,14 @@ public:
     }
     int res = stream.readStringUntil('\n').toInt();
     waitResponse();
-    return res == 1;
+    if (res != 1)
+      return false;
+
+    sendAT(GF("+CIFSR;E0")); // Another option is to use AT+CGPADDR=1
+    if (waitResponse() != 1)
+      return false;
+
+    return true;
   }
 
   String getLocalIP() {