User's Manual
Table Of Contents
- 1. INTRODUCTION
- 2. RS232 SERIAL PROTOCOL PRESENTATION
- 3. setting the internal parameters of the wavecard
- 3.1- Configuration of the functional parameters
- 3.2- Configuration of the control parameters
- 3.2.1 - selection of the radio operating channel when FHSS is deselected
- 3.2.2 - Selection of the RF medium physical mode
- 3.2.3 - Selection of the radio board emission power
- 3.2.4 - Activation of the Wavenis RF Asic RSSI threshold autocorrection
- 3.2.5 - Selection of the serial baudrate.
- 3.2.6 - Reading the firmware version of the WaveCard
- 3.2.7 - Reading the RSSI level (Received Signal Strengh Indicator)
- 3.2.8 - TEST Mode
- 4. SERVICE COMMANDS
- 5. COMMUNICATION MODES
- 5.1- 'Frame Exchange’ Mode
- 5.2- 'Message’ Mode
- 5.3- ’Polling’ Mode
- 5.4- ’Broadcast’ mode
- 5.4.1 - Configuration of the parameters relating to the 'Broadcast' mode
- 5.4.2 - 'BroadCast' mode without waiting for a response
- 5.4.3 - 'BroadCast' mode with waiting for responses
- 5.4.4 - Format of the commands – from the request transmitter side
- 5.4.5 - Format of the commands – from the request receiver side
- 5.4.6 - Use of the selective, or not-selective broadcast mode
- 5.5- ’Multi frames' Mode
Document : WCAMODHEL.sxw
3.2.7 - Reading the RSSI level (Received Signal Strengh Indicator)
The RSSI level represent the QOS level (Quality Of Service) from a given module. This value can be used to
verify the quality of the signals forwarding on the network.
It is possible to take this measurement on a distant module, or the local module. The following examples
illustrate the types of measurements being able to be carried out.
Example 1 : Reading of RSSI, in Point-to-point mode.
REQ_READ_REMOTE_RSSI : request the RSSI level of the signal 1. (i.e. the RSSI level on signal 1
reception by the distant equipment)
REQ_READ_LOCAL_RSSI : request the RSSI level of the signal 2. (i.e. the RSSI level on signal 2
reception by the local equipment)
Example 2 : Request of reading of RSSI level on a distant module, in relaying mode.
REQ_READ_REMOTE_RSSI : request the RSSI level of the signal 1.
Therefore, to know the RSSI level between the repeaters, it will be necessary to make a request
REQ_READ_REMOTE_RSSI on each repeater.
a) Commands
CMD NAME DESCRIPTION
0x68 REQ_READ_REMOTE_RSSI request to read RSSI level from remote equipment.
0x69 RES_READ_REMOTE_RSSI Response to the read remote RSSI level request.
0x6A REQ_READ_LOCAL_RSSI
request to read the Wavecard RSSI level on an exchange with a
distant equipment.
0x6B RES_READ_LOCAL_RSSI Response to the read local RSSI level request.
Remark : In the command byte coding, the Response frame type are taking the Request command byte value
with the LSB bit set to 1.
WCAMODHEL Handbook page 31 of 74
LOCAL
DISTANT
2
1
LOCAL
DISTANT
1