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Scenario details:
- The intention is to take electrical meter readings periodically, every 10 minutes. By obtaining readings so frequently you will access the meter via GPRS instead of with GSM calls in order to save costs
- At the same time, the energy operator (Endesa, Iberdrola, etc.) will obtain a reading once a day with a conventional GSM call
- The GSM call will have priority. When the modem receives a call from the operator it will “freeze” GPRS connections to allow the operator to obtain readings. Once the GSM call has ended, GPRS connections are re-established
Config.txt configuration file:
| Configuration | Observations |
|
COMM_baudrate: 9600 |
Serial port baud rate Number of bits No flow control No flow control 1 stop bit No parity APN GPRS from the network operator GPRS Login GPRS Password Modem is always GPRS connected IMPORTANT. For GSM call, 2G is needed MTX server mode MTX terminal model Ping every 35 minutes without comms IP address to ping If modem is installed in Europe Establish GPRS Gateway, read the energy meter Accept incoming connections from any IP Accepts GSM calls from energy operator |
Enter the “ethernet” or “modem” connection type:
For an ethernet configuration, make sure the IP parameters are compatible with server access according to the concentrator local network configuration. For an ethernet connection, the configuration must be compatible with the concentrator’s local network topology so that it can access the servers. This configuration is done from the “Networks” configuration page (see section 3.2.2.3: “Networks”).
For a modem connection, the modem configuration must be correct before a connection can be set up. This configuration is done from the “Modem” configuration page (see section 3.2.2.4: “Modem”).
The parameters for the servers to be configured are at least the following:
Therefore the following fields need to be configured: “Interface”, “Type”, “Server type”, “Address”, “Port”, “Login” and “Password”.
The other fields can be left at the default values subject to the directories having been properly created beforehand. See section 3.1.2: “Configuration files” for more details.
Wait. The concentrator will reboot using its factory configuration.
