Though not a language, I would also suggest learning the following
Node-Red, Open Source excelent flow based graphical design tool that easily can be used to implement gateways, IOT control logic etc. It runs on a PI or pretty much any other SBC or PC running Java / NodeJS. https://nodered.org/
MQTT, a open source communications broker very popular in the SBC field, runs on almost every platform out there, it implements the Publish / Subscribe paradime and acts as the broker in the middle https://mosquitto.org/ . you can get clients for everything including Arduinos, ESP8266, PC, Linux, etc.
Though not a language, I would also suggest learning the following
Node-Red, Open Source excelent flow based graphical design tool that easily can be used to implement gateways, IOT control logic etc. It runs on a PI or pretty much any other SBC or PC running Java / NodeJS. https://nodered.org/
MQTT, a open source communications broker very popular in the SBC field, runs on almost every platform out there, it implements the Publish / Subscribe paradime and acts as the broker in the middle https://mosquitto.org/ . you can get clients for everything including Arduinos, ESP8266, PC, Linux, etc.
