Central board for water vending machine
Function: main board for vending water machine. Bill and coin acceptors, card readers connection. Controled and managed by Powerboard of reverse osmosis, under 12 solenoid valves, 2 pumps, 3 dosing pumps, 2 kinds accounters: water and electrical, 2 pcs alarm pressure gauge. Connecting with the server by GPRS-modem.
STM32F207, GSM-modem, RS232 and RS485 connection, 4 manage 12V channels, 2 manage 24V channels.
Connecting with sensors: temperature, lighting, humidity, movement, impact.
Programming language - "C". RTOS: Keil RTX.
About 20 000 lines of quality code.
The protocol of Bill acceptor - ICT, Protocol of coin acceptor is CCTalk.
Supporting SOFT for desktop is WaterServiceManager.
HARD: FULL CYCLE - conception, schematic design, PCB layout, PCB documentation, prototyping, testing & bug fixing, produce.
SOFT: FULL CYCLE - conception, development programme, testing & bug fixing, upgrading.
Works well till today!