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Elfin EW11 RS485‐WiFi setup

Robert Eden edited this page Jan 28, 2024 · 2 revisions

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.

ew11

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

Pool_Control_Dashboard