WaveWare TMR1P - Manual (Page 6)

DAVISCOMMS (S) PTE LTD
If flow control is enabled, the CTS line is used to determine if the host is ready to receive data
from the TMR1P. When the host has received an RTS and is ready to receive the data, a logic
high is asserted. If the host disables the CTS line while the complete message is not fully
received, TMR1P will perform timeout for 10 seconds. If the host re-asserts the CTS line before
timeout, the TMR1P will continue to send out the remaining message to the host. If the CTS line
is asserted after timeout, the TMR1P will resend the entire message provided the message has not
been overwritten by the incoming paging messages.
When CTS is asserted, TMR will delay for a programmable interval before sending out data.
This programmable delay is a TPS option.
TPS Option:
CTS Response Delay: (0 – 10000ms)
1.15 Over-the-Air (OTA) Programming
Over-the-air (OTA) programming is a method of changing TMR1P settings without requiring the
TMR1P to be physically connected to a PC. OTA programming commands are transmitted over
the paging system as alphanumeric messages.
You can use the TMR1P TPS (Telemetry Programming Software) to generate the OTA strings
that are to be sent to TMR1P. The TPS itself does not send the OTA strings; separate paging
software is required for that. OTA reprogramming can only be used with TMR1P that had the
OTA password field set when they were last programmed through a connection to PC.
Each TMR1P will only process OTA messages received on Capcode 1. The TMR1P will not
process OTA messages received on other capcodes. Additionally, the TMR1P cannot process
OTA messages where there was an error in transmission, or if the TMR1P is off.
For more information on OTA programming, please refer to the on-line help file in the TMR1P
TPS.
Cautions: When an OTA string of incorrect password is received 8
times by a TMR, it will set
the RF Disable Bit in the EEPROM and disable the receiver
permanently. The only way out is to
erase the EEPROM and start afresh. If OTA is attempted with a
correct password prior to the 8
th
incorrect password, the TMR will reset the OTA password count to
0, thus allowing 8 more tries.
A page is considered as a candidate for a valid OTA string as
long as the OTA header matches
“)&)NP1”. The purpose of such design is to prevent unauthorised
users from hacking the TMR
via OTA.
1.16 Sub-Address
Control
6 500088R03
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