If you want to send a "then that" trigger to your esp8266, you can use a webhook.

However, you need to do some preparations on your home network:

• You need to have a webserver running on your esp8266.
• You need to enable port forwarding on your router for one port to be forwarded to your esp8266.
• You need to know your public facing IP-address or you need to use a DynDNS service.
• You need to be aware about the security implications of opening a public facing port and forwarding this to your esp8266.

Here is what you then need to enter into the ifttt webhook action fields:

• URL: enter your public facing IP-address (including port that is forwarded to the esp8266) or your dynDNS address.
• Method/Content Type/Body: feel free to choose.

Here is what you need to implement on your esp8266:

On the esp8266 you need to have the webserver check for a http request as configured in your webhook and react according to your wishes.

If you want to send a "then that" trigger to your esp8266, you can use a webhook.

However, you need to do some preparations on your home network:

• You need to have a webserver running on your esp8266.
• You need to enable port forwarding on your router for one port to be forwarded to your esp8266.
• You need to know your public facing IP-address or you need to use a DynDNS service.
• You need to be aware about the security implications of opening a public facing port and forwarding this to your esp8266.

Here is what you then need to enter into the ifttt webhook action fields:

• URL: enter your public facing IP-address (including port that is forwarded to the esp8266) or your dynDNS address.
• Method/Content Type/Body: feel free to choose.

An example for a simple http call:

http://yourexternalip:yourport/msg?switch=0

Here is what you need to implement on your esp8266:

On the esp8266 you need to have the webserver check for a http request as configured in your webhook and react according to your wishes.