git.giacomolli.uk - onehouse/blob - driver/m31/client.go

   1 package m31
   2
   3 import "context"
   4
   5 // Client owns one serialized Modbus connection. Connect replaces a closed
   6 // connection and selects a unit from one through 247. Reads must return the
   7 // exact requested count. Writes validate their acknowledgements. All operations
   8 // honor caller cancellation. The driver closes each connection before retry.
   9 // A caller must not use the client concurrently.
  10 type Client interface {
  11         Connect(ctx context.Context, address string, unit byte) error
  12         Close() error
  13         ReadInputs(ctx context.Context, count uint16) ([]bool, error)
  14         ReadCoils(ctx context.Context, count uint16) ([]bool, error)
  15         ReadRegisters(ctx context.Context, address uint16, count uint16) ([]uint16, error)
  16         WriteCoil(ctx context.Context, address uint16, value bool) error
  17         WriteCoils(ctx context.Context, address uint16, values []bool) error
  18         WriteRegister(ctx context.Context, address uint16, value uint16) error
  19 }