B&B Electronics ZXT9-RM-KIT - Manual - Manual (Page 9)

Document Number: pnZXTxRM-0712m
Page 9
2.4.1 Idle State
• Checks for Valid RF Data received and discards invalid data
• Checks for serial data to be packaged and RF transmitted
• Received Valid RF data in buffer to be output serially
• Checks if Sleep Mode condition is met
• Checks for Command Mode commands
2.4.2 Transmit State
•
Packages serial data (2048 bytes max in RF packet)
o ZXT9RM – 2048 bytes max
o ZXT24RM – 202 bytes max
•
Returns to Idle State
2.4.3 Receive State
•
Switches to Receive State to start receiving RF packets if RF data was detected while
in the Idle State
•
Returns to Idle State when data is no longer detected or an error is detected
2.4.4 Sleep State
•
This allows the radio modem to enter a state of low power consumption when not in
use.
2.4.5 Command Mode
Enters AT Command mode with +++ sent to serial input with Guard Time before and
after. Exits after Timeout. The guard times and the entry characters are user
configurable.
2.5 User Interface Components
2.5.1
Signal Strength (RSSI) LED’s
There are eight green LED‟s to indicate signal strength (Received Signal Strength
Indicator / “RSSI”). They are arranged to indicate RSSI from weakest (bottom LED lighted)
to strongest (all eight LED‟s lighted). See figure 2-1.
Figure 2-1 RSSI Indicator
2.5.2 Transmit LED
The green transmit LED flashes when data is transmitted out the serial port. See figure 2-
2 below.
2.5.3 Receive LED
The green receive LED flashes when data is received by the serial port. See figure 2-2
below.