Hi.
Looking for a wifi gadget that will receive communication (link) from a 'smart' mobile phone DIRECTLY ; NO routers involved, as to turn on/shut off a nearby relay.

I know it can be done as I have printed a document from my phone directly with no router in my house.

PhoneWifi----------AIR--------------->PoweredWifidevice---------wired----------->Relay on/off-----------wired--------->Whatever

 

A smartphone can be programmed to send a message via bluetooth.
A device can have an MCU plus an HC-05 module to receive the message.

 

Can this thinghy receive direct wifi from a phone ? How to recognize the 'direct' feature ? What else would be needed ? An application ?

----> https://www.temu.com/smart-power-sw...ch-enthusiasts-zigbee--g-601102606904584.html

 

Firstly, you need a “trigger event” to initiate the smartphone to send the message, for example, a user has to press a button which on today’s smartphone would be a “soft“ button such as an icon on the screen.

For that, you need to create an “app” which runs on your smartphone.

 

Would these animals do it ?
----> https://www.jemrf.com/pages/how-to-use-the-flex-module-for-remote-control
----> https://www.dsecctv.com/Prod_telecomando_wifi_via_internet_con_app_domotica.htm

 

Firstly, you need a “trigger event” to initiate the smartphone to send the message, for example, a user has to press a button which on today’s smartphone would be a “soft“ button such as an icon on the screen.

For that, you need to create an “app” which runs on your smartphone.

No necessarily. I communicate with IOT devices that I created, via the phones’s browser. I.e. the IOT device serves up a web page with buttons. I have not tried it, but it should work as well if I used my phone as a hotspot, so no other WIFI connection needed.