WI.232FHSS-250-R datasheet(17/67 Pages) RADIOMETRIX

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WI.232FHSS-25-R/ WI.232FHSS-250-R DATASHEET

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0x3000

0xE000

Data sent to UART. RF ACK sent

to 0x1000 by GUID.

0x06

0x1000

0x3000

0x2000

0xF000

Not processed- discarded.

0x3000

0xF000

Data sent to UART. No RF ACK

sent.

Table 3, User Addressing Examples

2.4.3. Extended User Addressing Mode

When Extended User Network mode is selected, transmitted packets locate endpoints using the customer ID

and destination User ID (specified in regCUSTID[1-0] and regUSERDESTID[3-0], respectively). An RF

packet sent with Extended User Network mode enabled carries 20 bytes of overhead. On the receiving side,

each module has a User ID mask (regUSERIDMASK[3-0]) that it applies to both its own User ID

(regUSERSRCID[3-0]) and the incoming destination User ID. Once both are masked, if the results are

equal, the receiving module will pass the payload data to the application for presentation to the host.

Additionally, if the incoming address, once masked, equals the mask itself, its payload will be presented to

the host. If an acknowledgement is requested, the receiving module will respond only if the unmasked User

IDs are equal. When using extended user network mode to send packets to multiple users (mask not equal

to 0xFFFFFFFF), assured delivery must be disabled. Failure to do so could cause extreme delays in

transmission and loss of data. The following table shows some examples of extended user addressing at

work.

Sender

Receiver

Network

Mode

User SRCID

User DESTID

User SRCID

User

IDMASK

Response

0x07

0x10000000

0xFFFFFFFF

0x20000001

0xFFFFFFFF

Data sent to UART. No RF

ACK sent by either module.

0x20000002

0xFFFFFFFF

0x17

0x10000000

0xFFFFFFFF

0x20000001

0xFFFFFFFF

Data sent to UART in both

modules. No ACK sent by

either module. This

configuration will cause

transmission problems.

0x20000002

0xFFFFFFFF

0x17

0x10000000

0x30000001

0x20000001

0xE0000000

Data sent to UART. No RF

ACK sent.

0x30000001

0xE0000000

Data sent to UART. RF ACK

sent to 0x10000000 by GUID.

0x07

0x10000000

0x30000002

0x20000001

0xF0000000

Not processed- discarded.

0x30000001

0xF0000000

Data sent to UART. No RF

ACK sent.

Table 4, Extended User Addressing Examples

2.4.4. Assured Delivery (Acknowledgement)

While not an addressing mode on its own, assured delivery can be enabled for each of the above addressing

modes. When a module transmits with assured delivery enabled, it obligates the receiving module to return

an acknowledgement packet. The transmitting module will wait for this acknowledgement for a preset

amount of time based on the data rate. If acknowledgement is not received, it will retransmit the current

packet. If the receiver receives more than one of the same packet, it will discard the packet contents but

send an acknowledgment. This way, duplicate data is not presented to the receiver’s UART. It is extremely

important that assured delivery be used only when the unmasked user/extended user Destination ID or

Destination GUID points to a specific module. Failure to specifically address a valid endpoint could cause the

module to appear slow or unresponsive due to repeated retransmissions. This will also serve to congest the

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