ER400TRS EASY RADIO, ER400TRS Datasheet - Page 22

• Manufacturer Part Number: ER400TRS
• Description: MODULE, TX, 433MHZ
• Manufacturer: EASY RADIO

Specifications of ER400TRS

• External Depth: 4mm
• External Length / Height: 14mm
• External Width: 37mm
• Frequency: 433.92MHz
• Operating Temperature Max: 65°C
• Operating Temperature Min: -20°C
• Output Power: 10mW
• Rf Sensitivity: -100dBm
• Range: 250m

easyRadio errata notes:
ISSUE1
(LPRS ERRATA-001.pdf)
This Errata sheet applies to all ER400TRS-02 &
ER400RS-02 modules shipped prior to 4th May
2005.
ISSUE:
Frequency Channels 1, 4 & 9 may have poor or
no communication.
DESCRIPTION:
The receiving frequency channels 1, 4 & 9 which
can be selected using the easyRadio command
structure, (“ER_CMD#Cx” where x is the channel
number) as set by the factory may be sufficiently
off frequency to cause poor communication and in
worst cases none at all on these channels.
All other channels are unaffected.
This has been caused during production where
incorrect values have been set in the EEPROM
locations that control each channel frequency.
This is NOT a software bug, but rather a setting
used by the firmware. A couple of workarounds
can be suggested if this poses an issue, when
frequencies other than the defaults are used.
Work Around:
i)
ii)
The latest easyRadio Evaluation software
(Version 2 and above) incorporates the necessary
settings to update the module and is available for
download via
As this is NOT a firmware update, the firmware
version will remain unaffected.
LPRS Data Sheet
ERx00-02 Series V2.3
Do not use channels 1,4, or 9.
Update module settings.
http://www.lprs.co.uk
Datasheet Revision 2.3 Sept 2005
ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver
ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver
Easy-Radio ‘02’ (2
ISSUE2
(LPRS ERRATA-002.pdf)
This Errata sheet applies to all ER400TRS-02 &
ER400RS-02 modules with firmware up to
V2.01.5
ISSUE:
RTS (Host Ready) input, does not allow restart of
data flow when set low after being held high.
DESCRIPTION:
When Handshaking it enabled, the data received
over air will only be delivered if the RTS pin is
held low continually.
Any break in the sequence (ie. RTS being set) will
prevent remaining data being streamed.
The module may also reset, causing a
recalibration to take place.
No settings will be lost and reception will carry on
transparent to the host.
Work Around:
This issue will be resolved in the next firmware
revision (V2.01.6 & above)
Copyright LPRS 2005.
1. Do not enable the handshaking mode,
2. Use the CTS to prepare the system for
nd
Generation Modules)
then:
data and dedicate time to receive the
data.
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