Tag Archives: arduino lcd remote display rs485 modbus rtu ntc pid

Arduino at work on HVAC product

Working on heat recovery ventilation automation based on Arduino UNO rev3 board with a custom shield to connect:

  • Two temperature sensor (ntc);
  • A 0..10V analog input
  • Two inverter controlled by PWM 0..5V or 0..10V output
  • Four static 24V relay-ready outputs
  • Modulating valve mounted on a heating coil controlled by a PID
  • Freecooling by-pass damper
  • Anti-freeze damper
  • Modbus RTU on RS485 to communicate with a remote display

Remote display based on Arduino UNO rev3 board wall mounted with:

  • LCD display with 4 arrow keys
  • Two level menu navigation
  • Modbus RTU on RS485 to communicate with the HVAC device

At now we have made 12 plants shipped in Italy, France and Africa

Stay tuned!

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