Here I've developed the advaced display for my final year project i.e. mobile bathroom. This display I've used to diplay what's the amount of water left in the bucket.
There are in total two nodes I've used, one is water level sensor and other is lcd display board. Both the boards are communicating with each other with rs232 protcol.
This protocol sends the data serially.
Water level sensor send a byte of data when water level chages from one to another. This data is analysed by the lcd board which will take care of displaying character on the
16x2 lcd module. Water level '1' to '4' character to the LCD board and it displays the percentage of the water left.
Multi nod connections (Nod-1 and Nod-2)
Nod-1 is my water level sensor with 4 Led's
Nod-2 is using attiny44 which will connect the LCD in parallel mode and will provide the serial interface to send data to display it on LCD.
In Attiny 44 I've budgeted the pins as follows.
