Programming for the Front Ends

Flutter,Dart, JS,JSP and AJAX for fullfeatured Apps for Aggregating Data and controlling the IOT-Systems

For simple Prototyping use Processing,AppInventor, Blync and NODE-RED

later I like to put some more hints here

Programming the Middleware

1. Use Java, C++, C#, Groovy, Python or Dart/JS for the development of a own framework
2. Use APIs and Frameworks like MQTT, KAFKA, BLYNK (perhaps a own server) for the Development
3. Usage of an own Framework which implements MQTT, ISOagriNET and even more

Programming of the Gateways

1. Decide where to use LORAWAN, WiFi, Bluetooth or other standards for communication
2. the Dragino LG01/LG02 you can expand over the Arduino Bridge-Library
3. configure the Gateways for your needs. Be careful to fit your needs.

Programming and Configuring the Arduinos and other embedded devices

1. decide which device to use. With the arduinos, esp32, Raspberry Pi (Zero), Beaglebone, Odroid devices you have plenty of alternatives.
2. look if you have enough PINS for controlling the sensors
3. look if you have enough memory for the programs
4. look how much power each device needs and you have on the special locations
5. look to find the right library. Not every lib, they encourage you to use in the internet fits all needs.