Table of Contents
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1. Overview
The FDP03TJ010/020 (hereinafter referred to as the "FDP03") is a 2.4GHz-band wireless radio modem with a
compact and low power consumption design. FDP03TJ010 should be connected to an external antenna by an
antenna connector. FDP03TJ020 equips built-in antenna
.
2. Operating Modes
The FDP03 has the following three transmission modes:
- Packet transmission mode
- Headerless packet transmission mode
- Broadcast transmission mode
2.1 Packet Transmission Mode
The FDP03 supports two types of wireless addresses. One is unique address and the other is group address.
At packet transmission mode, data packets are transmitted to the unique address and/or group address through
the serial port. AT this mode, the packet format should be text or binary data.
(1) Configuration of text packet
Command header
1 byte
@
(2) Configuration of binary data packet
Command header
1 byte
@
Processing of packet transmission and reception
When a packet is input to a sender FDP03 via the serial port, the sender FDP03 checks whether the packet is
valid.
Then, if the packet configuration is invalid or a time gap between bytes is more than 5 seconds, the sender
FDP03 distinguishes an occurrence of a packet error and ignores the packet. At that time, the sender FDL01
notifies the occurrence of the packet error if the functions of "Enabling response" and "Enabling N0 response"
in he REG13 are turned on.
If the functions of "Enabling response" and "Returning P1 and P0 responses" in the REG13 register are turned
on, the sender FDP03 replies a P1 response to the host when it receives a valid packet data. However, the
sender FDP03 does not return any response if the functions of the REG13 register is different setting. Then,
the sender FDP03 transmits the packet through wireless transmission to the destination address, receiver
FDP03.
At receiver FDP03 side, it output the packet data through the serial port if configurations of packet are valid.
Do NOT place FDP03TJ020 near any metal objects. Because
FDP03TJ020 uses built-in antenna, RF radio will be blocked and will
have unnecessary reflections if it is placed near metal objects.
Communication distance of FDP03TJ020 will be dramatically changed
by the surrounding environment.
Destination
Command
address
3 bytes
3 bytes
TXT
000 to 255
Destination
Command
address
3 bytes
3 bytes
TBN
000 to 255
Data (message)
0 to 130 bytes
User defined data
Number of
Data (message)
data bytes
3 bytes
0 to 130 bytes
User-specified defined
000 to 130
1
Ver.1.0
Delimiter
2 bytes
<Cr><Lf>
Delimiter
2 bytes
<Cr><Lf>
data
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