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din-wifi

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Table of Contents

WiFi DIN module

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remoteqth.com_img_wiki-din-module-w-30.jpg remoteqth.com_img_wiki-din-module-w-26.jpg

Main features

  • WiFi or Ethernet conectivity
  • RS-485 or USB-C interface (share same serial and baudrate speed)
  • Direct connection of 1-wire thermistor DS18B20
  • Three open collector outputs
  • Mounting on DIN rail
  • ESPhome firmware

BLOKOVE SCHEMA

Quick start guide

  1. Connect to the power or USB-C
  2. On your PC/notebook/phone select WiFi AP “EMS NG” and connect it
  3. Password is “12345678”
  4. open url http://192.168.4.1 and select your home WiFi AP and connect it
  5. After rebooting, connect a serial console (115200 baud) where you will see a connection to your home AP and an IP address assigned from DHCP. After connecting to this address, you can configure the device via the web interface…
  6. Asociate to Home assistant…

Update firmware

Precompiled firmware in .bin format

  1. is available on GitHub release page (with ESPhome label) in two variants. With activated WiFi or Ethernet interface - choose variant according to the interface you want to use.
  2. you can compile your own .bin file according to the configuration .yaml file also available on GitHub

You can upload the firmware in two ways

  1. via the web interface of your own device (integrated in ESPhome)
  2. via USB-C using, for example, the web tool https://web.esphome.io/

How to connect

Power

  • The modul can be powered in the range of 12-24V DC with a maximum consumption of 1A
  • The power supply can be connected in two ways
    1. pluggable two pin female terminal block.
      Attention to polarity!

      This input is protected by a 1A fuse.

    2. Ethernet passive POE with external POE injector

      POE power is available even when the Ethernet interface is inactive and WiFi connectivity is used.
      The POE injector is protected with a 0.5A fuse to prevent the current limit of the Ethernet isolation transformer from being exceeded.

Interfaces pinout

Functionality Front view pinout
RS-485

Three open
colector outputs 		1 - from 12 to 24V DC from PWR input
2 - open colector 500mA Stykac2 with 10k pull-up
3 - from 12 to 24V DC from PWR input
4 - open colector 500mA Stykac1 with 10k pull-up
5 - from 12 to 24V DC from PWR input
6 - open colector 500mA SSR with 10k pull-up
7 - RS485-A
8 - RS485-B

Attention: because the USB-C interface shares the same serial UART with the RS-485 interface, RS-485 is not available after connecting USB. The USB-C connection is detected on GPIO36. For the same reason, both interfaces share the same Baudrate.
Power 2 - input power from 12 to 24V DC/1A
1 - GND
WiFi SMA female
2,4G WiFi antenna connector
Five LEDs RED - fail fuse - To replace, it is necessary to open the module with an Allen key and replace the 1A fuse (see BOM)
RED - SSR
RED - STYKAC1
RED - STYKAC2
GREEN - Power
USB-C USB-C serial
+5V VBUS
SBU1 - 3V3 Gpio33 (I2C SDA)
SBU2 - 3V3 Gpio32 (I2C SCL)

Attention: because the USB-C interface shares the same serial UART with the RS-485 interface, RS-485 is not available after connecting USB. The USB-C connection is detected on GPIO36. For the same reason, both interfaces share the same Baudrate.
1-wire thermistor JST 1-wire for DS18B20 thesrnistor
1 - +3,3V / max 500mA
2 - 1-wire bus (Gpio15)
3 - GND
Ethernet 1,2,3,6 - Ethernet
4+5 - POE DC power input 12-24V/max 1A, any polarity
7+8 - POE DC power input 12-24V/max 1A, any polarity
Green LED - 100M
Yelow LED - ACT

BOM

1x Power connector https://www.tme.eu/cz/details/tj0231530000g/rozpojitelne-svorkovnice/amphenol-anytek/
1x DS18B20 with JST conector https://www.laskakit.cz/en/dallas-ds18b20-digitalni-vodotesne-cidlo-teploty-3m/
1x WiFi antenna + 5cm UF.L pigtail https://www.hadex.cz/o856-antena-wifi-24ghz--pigtail-ufl-sma/?gQT=1
2x M3x10mm https://www.tme.eu/cz/details/b3x10_bn2844/srouby/bossard/1489380/
1x 1A fuse https://www.tme.eu/cz/details/0218001.txp/pojistky-5x20mm-zpozdene/littelfuse/
30g fillament PETG-V0
UL94-V0 UL certificate IEC 60695-11-10 		https://www.prusa3d.com/cs/produkt/prusament-petg-v0-natural-1kg/
1x 3D print model https://www.printables.com/model/1386414-arduino-esp32-ethernet-din-module

Firmware

on GitHub sign ESPhome label

Other

din-wifi.1764519891.txt.gz · Last modified: by ok1hra