Domotica

Gateway Ethernet W5100

The gateway between the NRF24L01+ network and the intranet

Design principles

Based on
- https://www.mysensors.org/build/ethernet_gateway
code based on
- https://github.com/mysensors/MySensors/tree/development/examples/GatewayW5100
The gateway always has node id 0.

The whole wireless network makes use of the last channel: MY_RF24_CHANNEL = 125. This in the hope that it will disturb the Wifi less. According to the NRF24L01+ product specification, the RF channel frequency is (2400 + 125) MHz = 2525 MHz. The Wifi channels stay below 2500MHz (according wikipedia), so there is no overlap!
The IP address is assigned dynamically by the router by DHCP.
The port used is 5003.
The MAC address is 0xDEADBEEFFEED.

Used components

Wiring

MISO = M1 MOSI = M0

Component	Pin	Wire	Pin	Component
NRF24L01+ Adapter	VCC	red	5V	PowerSupply HLK-PM01
NRF24L01+ Adapter	GND	brown	GND	PowerSupply HLK-PM01
NRF24L01+ Adapter	CE	white	D5	ArduinoNano5V
NRF24L01+ Adapter	CSN	grey	D6	ArduinoNano5V
NRF24L01+ Adapter	SCK	purple	A0 (= 14 in the code)	ArduinoNano5V
NRF24L01+ Adapter	M0 (MOSI)	blue	A1 (= 15 in the code)	ArduinoNano5V
NRF24L01+ Adapter	M1 (MISO)	green	A2 (= 16 in the code)	ArduinoNano5V
ArduinoNano5V	5V	red	5V	PowerSupply HLK-PM01
ArduinoNano5V	GND	black	GND	PowerSupply HLK-PM01
W5100 Ethernet	+5	red	5V	PowerSupply HLK-PM01
W5100 Ethernet	G	brown	GND	PowerSupply HLK-PM01
W5100 Ethernet	CK (SCK)	orange	D13	ArduinoNano5V
W5100 Ethernet	M1 (MISO/SO)	green	D12	ArduinoNano5V
W5100 Ethernet	M0 (MOSI/SI)	yellow	D11	ArduinoNano5V
W5100 Ethernet	SS (SS/CS)	blue	D10	ArduinoNano5V

Code

baud rate 115200
board: Arduino Nano
GatewayEthernetW5100.ino

API documentation and Debug

See the following links:

Description	Link
Serial API	https://www.mysensors.org/download/serial_api_20
Debug explanation	https://www.mysensors.org/build/debug
Debug detailed encoding	https://www.mysensors.org/apidocs-beta/group__MyTransportgrp.html

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