Hello. I want to develop a little project for my garden.
The core of the system would be the Raspberry PI 4 with a 7" inch display sitting in my greenhouse. I would like to use MQTT ( with NODE-RED or python I havent decided yet but I think using node-red would be the most convenient as you can make quite neat user interfaces there). I will have multiple esp32 devices scattered across my garden doing various tasks ( measuring temperature of various places, humidity, soil humidity, smart watering system and etc) and I want those ESP32 devices to communicate to my Raspberry PI using MQTT so I can avoid wiring everything together which would be extremely inconvenient.
My main concern:
1. Since the Raspberry PI and ESP32 devices will be sitting somewhere outdoors outside my home WiFi range, is it possible to use MQTT? I read that MQTT does not actually need physical internet connection, it just needs IP network. Can I somehow create an access point on my Raspberry PI where no physical internet is available and connect to that access point on my ESP32 devices so I can send publish/receive MQTT packets between the devices? If not, are there any other ways to achieve this?
Thanks in advance.
The core of the system would be the Raspberry PI 4 with a 7" inch display sitting in my greenhouse. I would like to use MQTT ( with NODE-RED or python I havent decided yet but I think using node-red would be the most convenient as you can make quite neat user interfaces there). I will have multiple esp32 devices scattered across my garden doing various tasks ( measuring temperature of various places, humidity, soil humidity, smart watering system and etc) and I want those ESP32 devices to communicate to my Raspberry PI using MQTT so I can avoid wiring everything together which would be extremely inconvenient.
My main concern:
1. Since the Raspberry PI and ESP32 devices will be sitting somewhere outdoors outside my home WiFi range, is it possible to use MQTT? I read that MQTT does not actually need physical internet connection, it just needs IP network. Can I somehow create an access point on my Raspberry PI where no physical internet is available and connect to that access point on my ESP32 devices so I can send publish/receive MQTT packets between the devices? If not, are there any other ways to achieve this?
Thanks in advance.