I'm starting to explore IoT in my home, the first step being to connect a raspberry pi 3 B+ to a DHT22 temp/humidity, record DHT readings in a database which I then surf via a node server running on the pi. All good.
I got help from e.g.: http://www.circuitbasics.com/how-to-set-up-the-dht11-humidity-sensor-on-the-raspberry-pi/
I'd like to broaden this now to add some cheap wireless temperature/humidity sensors, but most of the ones I've found appear to be locked to their manufacturer, e.g. Xiomi.
The answer to this question suggests connecting a RF module to the pi to receive data from sensors. This instructable also seems promising, suggesting purchasing these transmitter/receivers.
So maybe I'd be able to connect something like this sensor to such a setup?
Will using RF 433MHz be a good way for me to keep costs down?