From 53a7bc888b6571f1d7a10a9efe621c18b22b63bc Mon Sep 17 00:00:00 2001
From: torntrousers <torntrousers@gmail.com>
Date: Mon, 12 Mar 2018 14:30:47 +0000
Subject: [PATCH] Add packetFrequencyError to API.md

---
 API.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/API.md b/API.md
index 07c808e..0e4a8e9 100644
--- a/API.md
+++ b/API.md
@@ -166,6 +166,14 @@ float snr = LoRa.packetSnr();
 
 Returns the estimated SNR of the received packet in dB.
 
+### Packet Frequency Error
+
+```arduino
+long freqErr = LoRa.packetFrequencyError();
+```
+
+Returns the frequency error of the received packet in Hz. The frequency error is the frequency offset between the receiver centre frequency and that of an incoming LoRa signal.
+
 ### Available
 
 ```arduino