BACnetStack_SendReadRangeWithPosition

bool BACnetStack_SendReadRangeWithPosition(
  uint8_t * sentInvokeId,
  const uint16_t objectType,
  const uint32_t objectInstance,
  const uint32_t propertyIdentifier,
  const bool usePropertyArrayIndex,
  const uint32_t propertyArrayIndex,
  const uint32_t referenceIndex,
  const int16_t count,
  const uint8_t * connectionString,
  const uint8_t connectionStringLength,
  const uint32_t networkPortInstance,
  const uint16_t destinationNetwork,
  const uint8_t * destinationAddress,
  const uint8_t destinationAddressLength);

Sends a confirmed ReadRange request using the By Position reference (cl. 15.8), reading count entries starting at referenceIndex (negative count reads backwards from the reference).

The reference is sent as the by-position [3] arm of the request’s range CHOICE (cl. 21).

See also: Client response hooks

BACnet reference: ANSI/ASHRAE 135-2024 clause 15.8 (ReadRange Service).

Parameters

Parameter	Direction	Description
`sentInvokeId`	out	The invoke-id of the sent request, valid only if this function returns true.
`objectType, objectInstance`	in	The object being queried: one BACnet Object Identifier, carried as two parameters (see the API conventions).
`propertyIdentifier`	in	The list/array property to read a range of.
`usePropertyArrayIndex, propertyArrayIndex`	in	If usePropertyArrayIndex is true, read a range of this array element.
`referenceIndex`	in	The 1-based list/array index to read relative to.
`count`	in	The number of entries to read; negative reads backwards from referenceIndex. 0 is refused (135-2024 cl. 15.8.1.1.4.1.2): the function returns false and sends nothing.
`connectionString, connectionStringLength`	in	The datalink address to send TO (the destination) - not the local address to send from. For IPv4 this is 6 bytes: 4 octets of IPv4 address followed by 2 octets of port, big-endian (e.g. 0xC0,0xA8,0x01,0x05,0xBA,0xC0 = 192.168.1.5:47808; see BACnetStack_SendRegisterForeignDevice() for a worked example); on BACnet/IPv4 the stack refuses to send to a connection string of any other length, except that a broadcast from a device registered as a foreign device goes to its BBMD and does not use the connection string. MS/TP and BACnet/SC use a different connection-string shape; see their respective Set/Send exports.
`networkPortInstance`	in	The Network Port object instance to send the message on, or BACNET_NETWORK_PORT_DEFAULT (4194303) for the default/single port.
`destinationNetwork, destinationAddress, destinationAddressLength`	in	The destination to send the request to.

Returns

True if the request was sent, otherwise false.

Topic: Client requests. Declared in CASBACnetStackDLL.h.