This is a design of microclimate monitoring system, which can be used in an enclosed area (in greenhouses). The design consists of slave devices, making measurement and one master device, responsible for displaying the results of measurements and storing them.
The device can be improved – below you can see some ideas of modifications:
a program for archiving, visualization of results of measurements written in Visual Studio
other sensors support (CO2, pressure)
smaller circuits
battery supply of the slave devices
radio systems can be changed into more advanced ones
relay module for control the executive system (heaters, driers, fans, etc)