README

Author: budulinek

Ethernet_SW_Reset.md

@@ -1,12 +1,12 @@
-# W5x00 Chip Reset
+# Ethernet Power On Reset Issue
 
 ## Issue
 
 Sometimes Arduino is running fine for days but after power-up or brief loss of power (caused for example by undervoltage), ethernet connection is lost. Ethernet connection is restored only after you press the RST button on the ethernet shield. The issue has been identified and described in detail by the community for example [here](https://chrisramsay.co.uk/posts/2015/08/some-fun-with-a-cloned-arduino-and-w5100-ethernet-shield/), [here](https://www.youtube.com/watch?v=9ZBeprOqC3w), [here](http://tigawd.blogspot.com/2015/05/arduino-uno-clone-and-w5100-ethernet.html) and also [here](https://www.hobbyist.co.nz/?q=ethernet-shield-w5100).
 
 ## Cause
 
-Arduino ethernet shields use HW method to reset / initialize the W5x00 chip. They have the W5x00's RST pin hard wired to Arduino's RST pin. If Arduino is reset, the W5x00 should be reset also. However, normal reset time of the Arduino is too short. The Arduino microcontroller has a 65 millisecond powerup/reset delay (the longest available to be set by the fuses and bootloader) but the W5x00 chip expects longer pull-down of the RST pin. As a result, the W5x00 chip fails to reset (and initialize) properly.
+Arduino Ethernet shields use HW method to reset (initialize) the W5x00 chip. They have the W5x00's RST pin hard wired to Arduino's RST pin. If Arduino is reset, the W5x00 should be reset also. However, normal reset time of the Arduino is too short. The Arduino microcontroller has a 65 millisecond powerup/reset delay (the longest available to be set by the fuses and bootloader) but the W5x00 chip expects longer pull-down of the RST pin. As a result, the W5x00 chip fails to reset (and initialize) properly.
 
 The problem is poor ethernet shield design. This issue is not specific to cheap ethernet shields (clones), but exists in all variant of the Arduino Ethernet shields.
 
@@ -16,7 +16,7 @@ You can find different solutions on the internet - most of them require solderin
 
 ### 1. Cut the connection between W5x00's RST pin and Arduino's RST pin.
 
-Keep in mind that there are actually 2 connections between W5x00's RST pin and Arduino's RST pin. You need to cut both of them, simply by bending appropriate pins:
+We need to isolate the W5x00's reset signal when the boards are connected together. Keep in mind that there are actually 2 connections between W5x00's RST pin and Arduino's RST pin. You need to cut both of them, simply by bending out or cutting appropriate pins:
 
 - **Bend the RESET pin on the Ethernet shield.**
 - **Bend one pin within the ICSP connector on the Arduino board** (see below)

README.md

@@ -255,7 +255,7 @@ The code was tested on Arduino Nano, Uno and Mega, ethernet chips W5100 and W550
 * The random number generator (for random MAC) is seeded through watch dog timer interrupt - this will work only on Arduino (credits to https://sites.google.com/site/astudyofentropy/project-definition/timer-jitter-entropy-sources/entropy-library/arduino-random-seed)
 * The restart function will also work only on Arduino.
 
-## W5x00 Chip Reset
+## Ethernet Power On Reset Issue
 
 Sometimes the gateway is running fine for days but after power-up or brief loss of power (caused for example by undervoltage), ethernet connection is lost. What is the problem? The W5x00 chip on the Arduino Ethernet Shield is not initialized correctly upon power-up. There is an easy solution to the issue described in a separate [document here](Ethernet_SW_Reset.md).