Elfin EW11 RS485-WiFi setup

The Elfin EW11 RS485 connects to a RS485 network and makes that network available over WiFi.

There are two models:

• EW11: internal antenna
• EW11-0: external antenna (Reverse Polarity SMA connector aka RP-SMA)
• size (without antenna) 61x28x18mm
• mounting for a few installation types are included
• both accept power from 5-36 VDC
• both have RJ45 connectors for a custom cable, and include a 4-PIN header to connect to your equipment.

I (rmeden) installed mine inside my Intellitouch power center. I just needed to cross some wires on the RS485 connectors. I bought the external antenna version (just in case). Turns out the signal is a bit weak, I'm considering an antenna extension cable. If you get one, note the connectors are RP-SMA.

Initial Setup (from factory state)

• power on. Green LED will blink

• search on phone for EW11 wifi, connect to it.

• browse to 10.10.100.254 user admin pass admin

• serial settings

• • For IntelliTouch: 9600 baud 8/1/none, buffer 1024, duplex half, protocol none

• communication settings

• • local port 9801 (or just make a note of it)
• • buffer 1024 keepalive 60, timeout 300
• • Security disable Route: UART

• system settings

• • wifi settings
• • wifi-mode AP+STA
• • Scan for your wifi network, select it and provide KEY
• • save settings

• Others (poorly worded menu choice)

• • restart

• Reconnect to EW11 AP as before

• browse to 10.10.100.254 user admin pass admin

• Status page Note IP assigned (should be on your home network )

• Status page Note serial port, should see received bytes/frames

• resolve these two issues before proceeding!

• Connect to your home network

• browse to EW11 IP address and log in admin/admin

• if it's working, consider changing Wifi Mode to STA only (it's more secure)

• if it's working, consider reserving the IP on your router. Configure IP and Port in nodejs-PoolController-Dashpanel