• (English) ESP8266 WiFi relay board on sale

(English) ESP8266 WiFi relay board on sale

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Anyone having followed our developments, blog posts and product releases may have realized that we have been incorporating the inexpensive ESP8266 IC and modules in our designs where a WiFi communication path was necessary. The ESP8266 has proven to be a fantastic IC not only for DIY projects but also for professional applications. Needless to say that our first low-cost LIBERIOT gateways will rely on one of these.

As a proof of trust we have been working on a new family of WiFi devices based on the ESP8266 IC. The first of these devices is our new esp-output board, a six-relay board driven by an ESP-12E WiFi module. This board is paired with a sample application providing MQTT and HTTP interfaces to the board. This application runs on the ESP8266 IC itself and does not need any other host microcontroller. The application is built and programmed from the Arduino IDE, as explained in the wiki page.


The good point about having a relay board controllable via (WiFi) MQTT is that it only needs a WiFi access point and a MQTT broker to run. The board can be controlled from any computer, tablet or iPhone without the need of any other wireless infrastructure. On the other hand, the bad point is that providing large WiFi coverages is sometimes complex. This is why we recommend this board mainly for homes and small buildings. For large networks with long point-to-point distances we strongly recommend our classic output-board, based on our low-power ISM radios.

This board is provided fully assembled and programmed. Users will have however to rebuild the application with their right WiFi network settings and flash it onto the board from the Arduino IDE.

Driving any of the on-board relays is just a matter of sending a MQTT message to one of the available topics. As an example, let’s imagine that we want to turn relay 5 on pn an esp-output board with MAC 1AFE34D30AAD:

This same command can be transmitted via HTTP:

Details about the MQTT and HTTP API are described in the wiki page. The available sketch can also be modified to include new commands and logics so you can program the esp-output board to react base don network events such as button presses or temperature levels.

Either MQTT and HTTP are the most common interfaces nowadays, available on almost any automation software and graphical user interface. You can then control esp-ouput from Node-RED, OpenHAB, FHEM, HomeSeer and a long list of other automation software applications.

Link to the webstore.


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