2.2 KiB
Hooking up the interface board
If you have an EMS Gateway board then follow the instructions on BBQKees' wiki.
Things to check:
- Any external Dallas temperature sensors go to D1
- An external LED goes to D5
- Check the EMS bus lines are connected the right way:
| EMS board | ESP8266 dev board |
|---|---|
| Ground/G/J2 | GND/G |
| Rx/J2 | D7/GPIO13 * |
| Tx/J2 | D8/GPIO15 * |
| VC/J2 | 3v3 |
* Note the firmware purposely switches the UART0 from the standard GPIOs (Rx 1 and Tx 3) to pins 13 and 15 to prevent Serial traffic (e.g. via a USB connection) interfere with the EMS line. See the official document.
Adjusting the config settings
When the EMS-ESP is running for the first time it's likely to be Access Point mode with a SSID called ems-esp and IP of 192.168.4.1. Use a phone/pc/laptop and connect to AP's SSID. Then either use Telnet (port 23) to IP address 192.168.4.1 or type in this IP address in a web browser.
When using the web the default password is admin.
The first thing you probably want to do is set the wifi mode to Client and set the SSID and password dor your own network. Then restart the EMS-ESP device. If everything is working the software should detect the devices on the EMS bus and the LED should light up a solid blue. If not, use the Telnet to look any error messages.
The rest of the settings can be entered either via the Telnet interface (via set) or the web interface. The next settings you may want to change are the MQTT, tx_mode and publish_time.
Adding external Temperature sensors
The code supports auto-detection of Dallas type temperature sensors. The default GPIO pin used on the ESP8266 is D5 but this can be configured in the setting menu (set dallas_gpio) or via the web. The Dallas chips DS1822, DS18S20, DS18B20, DS1825 are supported including their parasite varieties and can be daisy-chained on one line. If you're using parasite make sure you set this using 'set dallas_parasite on'.
The values will be shown in the telnet session (info) and if MQTT is enabled sent as a single topic. See MQTT.