WIO Overview → WIOesp & WIOpico

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• WIOesp32 16 I/O
• WIOpico 16 I/O
• WIOpico 16 I/O CAN
• WIOpico 16 I/O ETH
• RCAN Protocol
• NeoPixel 'Cheat Sheet'
• Optocoupler for 5V Input

Raspberry Pi Pico 1	W5500	W5500	W5500-EVB-Pico

Goal is to provide a Pico with an ethernet connection W5500.
The W5500 is controlled by SPI and the WIOpico-ETH will use the same pin mapping as the WIOpico 16 I/O CAN.

• Only available for Pico's without WiFi shield. ✔️
• Looking up the Rocrail server by mDNS. ✔️
• Transparent communication between WiFi and Ethernet. ✔️
• Same pin mapping as the WIOpico 16 I/O CAN. ✔️

Use the following terminal command to activate the EthCon in WIO:

*ethcon=1

This is bit 0 in options7.
A reboot is needed.

To be able to set the hostname the Ethernet Library must be modified.
In Arduino/libraries/Ethernet/src/Dhcp.cpp the following code must be added/extended:

const char* g_DhcpHostName = ""; // ***** NEW code line
void DhcpClass::send_DHCP_MESSAGE(uint8_t messageType, uint16_t secondsElapsed)

	// OPT - host name
	buffer[16] = hostName;
	// ***** start NEW code lines
	if( strlen( g_DhcpHostName ) > 0 ) { 
		buffer[17] = strlen(g_DhcpHostName);
		strcpy((char*)&(buffer[18]), g_DhcpHostName);
	}
	else {
	// ***** end NEW code lines
		buffer[17] = strlen(HOST_NAME) + 6; // length of hostname + last 3 bytes of mac address
		strcpy((char*)&(buffer[18]), HOST_NAME);
 
		printByte((char*)&(buffer[24]), _dhcpMacAddr[3]);
		printByte((char*)&(buffer[26]), _dhcpMacAddr[4]);
		printByte((char*)&(buffer[28]), _dhcpMacAddr[5]);
	} // ***** NEW code line

This board connects the W5500 Reset and Interrupt to GP20 and GP21 which reduces the number of servos to two.
If NeoPixel has been activated the second servo pin GP26 is used for this and is no longer available for servos.

For the W5500-EVB-Pico the same PCB can be used as for the WIOpicoCAN without mounting U2 and U3. (MCP2515/MCP2562)

The W5500-EVB-Pico is also available with a POE option:

• Arduino Ethernet Library → Ethernet
• Arduino mDNS Library → ArduinoMDNS
• Pico Ethernet Library
• https://docs.wiznet.io/Product/iEthernet/W5500/w5500-evb-pico#pin-out