©2013 e-Gizmo Mechatronix Central
Page 4 of 5 pages
Multi Channel UHF Data Transceiver
Data size and Data Integrity
A data packet is a group of data that is sent togeth-
er in a single transmission. The MUDT is capable
of data payload of up to 96bytes per packet. This
should be more than suf! cient for a vast majority
of control applications. If large chunk of data need
to be transferred via the MUDT, the host controller
must break this down into packets not exceeding
96 bytes.
Furthermore, data integrity checking is weak in
the MUDT. If high accuracy data transfer is re-
quired, data integrity checking, such as checksum
or crc method, must be performed by the host
controller.
RSSI
Pulling the LOC (RSSI) control to logic 0 enables
the RSSI feature of the MUDT. RSSI, which stands
for Received Signal Strength Indicator, is a meas-
ure of how strong the transmitting RF signal is as
received by the MUDT.
RSSI is measured when the transmitting side
sends a packet. Remember, you cannot meas-
ure the RSSI if the transmitter is OFF. The RSSI
information is then appended to the received data
packet, and is presented in ! xed length 6-byte
ascii format as follows:
LF + r+ RSSI Value (3digit) + CR
Example: RSSI = 349
LF
r
RSSI (example 349)
CR
0x0A
0x72
0x33
0x34
0x39
0x0D
Communications Parameters
Baud Rate: 9600bps
Data: 8 bits
Stop Bits: 1
Parity: None
Handshake: None
PCB ARTWORKS
COMPONENT LAYOUT
COPPER PATTERN BOTTOM SIDE
(VIEWED FROM THE TOP SIDE)
COPPER PATTERN, TOP SIDE
