While cruising the Internet one day, [Raj] found a really cool
pair of RF transmitters and receivers manufactured by Dorji
Applied Technology. These modules – the DRF5150S and DRF4432S –
work just like any other ISM band transmitter receiver pair with
the addition of inputs for analog and digital input pins. This
allows to create wireless sensors without the need for a
separate microcontroller. [Raj] put together a tutorial for
using these radio modules, perfect if you need a very simple
wireless connection for your next project. [Raj]‘s tutorial for
using the Dorji sensor modules shows the transmitter has two
operating modes. The first mode is a simple data transmitter,
connected to a microcontroller through a UART connection. The
‘sensor’ mode doesn’t require a separate chip; the on-board
STM8L151 microcontroller reads analog values on two pins and
sends them over the air to the DRF4432S receiver module. After
programming the transmitter to function as a wireless sensor
with an app released by Dorji, [Raj]