Wavecard-Waveport User Manual
Coronis Systems
Commands related to radio frame exchanges
Radio exchanges are composed of several transmission/reception modes. In some cases it is possible to
receive several consecutive radio frames (multi-frame mode which is accessible in reception only).
The following modes allow
point-to-point
exchange:
Frame exchange mode
Wavecard sends a request and waits for a response from remote module.
Following the radio frame sending, the Wavecard radio board stay in radio
reception during a time (fixed by default at 2s, cf. RADIO_USER_TIMEOUT)
in order to receive the response from the addressed equipment. During this
time the serial RS232 link is not managed. This command is particularly
intended to read CORONIS SYSTEMS radio modules used to collect remote
information (temperature, humidity, meters index, ...).
Message mode
Wavecard sends a request without waiting for a response from the remote
module.
After sending a frame, the Wavecard radio board goes back to listening on
the serial RS232 link. This command may be used for simple data transfer
between Wavecard modules.
Relay mode
When a remote module is beyond a transmitting module's radio range, relay
mode may be used to forward frames via intermediate nodes (
repeaters
).
The maximum number of repeaters is 3.
The modes below allow selective and non-selective exchange with several remote modules at once:
Polling
This mode is used to address requests to a known list of remote modules.
Responses are sent to the host that issued the request when all remote
modules have responded, or after a time-out.
The list of remote modules is configured with a parameter setting command
(see chapter 3).
Broadcast
This mode allows a Wavecard to issue a request to all remote modules
within radio range of the transmitter. Broadcast may also be limited to a
selected group of modules.
Multi-frame reception
This is a particular case in which multi-frame exchange takes place between
a Wavecard or Waveport module (considered to be the
master
of the
exchange) and another Wavenis-based telemetry module, such as
Wavetherm, Waveflow, Wavesense, etc.
Note: Wavecard does not currently allow multi-frame mode between two
Wavecard/Waveport modules.
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