From 4d722a34f2f9854b0c6ff8d7c7c26d550828e569 Mon Sep 17 00:00:00 2001
From: "IoTThinks.com" <vinhdat82@gmail.com>
Date: Tue, 15 Jun 2021 09:53:01 +0700
Subject: [PATCH] To implement peek()

To implement peek() as in https://github.com/vshymanskyy/TinyGSM/issues/396
---
 src/TinyGsmFifo.h  | 5 +++++
 src/TinyGsmTCP.tpp | 7 +++----
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/TinyGsmFifo.h b/src/TinyGsmFifo.h
index 99b9880..0a4028d 100644
--- a/src/TinyGsmFifo.h
+++ b/src/TinyGsmFifo.h
@@ -122,6 +122,11 @@ public:
         return n - c;
     }
 
+	uint8_t peek()
+	{
+		return _b[_r];
+	}
+
 private:
     int _inc(int i, int n = 1)
     {
diff --git a/src/TinyGsmTCP.tpp b/src/TinyGsmTCP.tpp
index 9b770ef..391d1fe 100644
--- a/src/TinyGsmTCP.tpp
+++ b/src/TinyGsmTCP.tpp
@@ -241,10 +241,9 @@ class TinyGsmTCP {
       return -1;
     }
 
-    // TODO(SRGDamia1): Implement peek
-    int peek() override {
-      return -1;
-    }
+	int peek() override {
+		return (uint8_t)rx.peek();
+	}
 
     void flush() override {
       at->stream.flush();