WiMo 3G/4G modem – FAQ

First of all check all connections between the WiMo sonde and the Modem. Then you have to force a refresh of the accessories in the WEB interface. If you still don’t see your modem, the batteries might be dead. In this case it is necessary to replace them. Refer to the modem user manual to change the batteries.

When a battery alarm is transmitted it means that the modem will stop working in a short time. Depending on the speed and the configuration chosen, this can happen very quickly. It is therefore essential to plan to change the batteries as soon as possible. If the batteries are not replaced quickly, they will continue to discharge until the modem cannot be started properly. In this case you risk damaging the internal software and this requires product return to our after sales and services department.

The battery life depends strongly on your configuration. The autonomy can be from a few months to a few days. The modem has a GNSS location function. This is high power consumption function so depending on the rate you want to set you can significantly degrade your battery life. If the location function is not necessary we advise you to disable it to increase the autonomy. The second item of battery consumption is the rate of transmission of measurements. If you wish to send measurements less than 1 hour, the autonomy will be from a few days to a few weeks. For more important autonomies (a few months) it is better to choose a data transfer 1 to 2 times per day.

First of all you have to check that the sonde is set to record data. If the modem finds no files in the sonde it will not transmit anything. If files are present in the WiMo sonde you have to check your SIM card settings (refer to the modem manual) and make sure that the SIM card is activated with your operator.

In the WiMo sonde you can use your own SMTP/FTP servers or use the servers predefined in the sonde. In case you use your own servers you have to check that your server meets our protocol constraints (refer to the manual). To identify the source issue you can use our SMTP server and confirm that the modem is sending e-mails.

The last thing to look at is the batteries. Check that the batteries of your modem are full charge.

The modem operates independently. If you have previously activated the GPS, for example, it will be active until you disable it from the sonde. Therefore, before shutting down the system, it is necessary to stop the sonde and disable the GPS. Refer to the modem manual for more information. If this operation is not carried out, the GPS still remains on, and it could go into TimeOut mode and/or moving alarm, resulting in sending messages and a risk of complete discharge of the batteries.

For the GPS moving alarm to work, the modem must take a reference position. This position is taken each time you start the sonde in recording mode. The scenario may appear if the sonde is started in the laboratory and then installed on site to limit handling. In this case the risk is that the reference position is taken in the laboratory and the fact of going to install it on site takes the sonde out of its avoidance radius. At this point it is necessary to stop the sonde to reset everything.

If you wish to use the GPS moving alarm it is essential to start the sonde directly on operating site.

It has been observed that some functionnality are blocked by some provider.


Firstofall please note that M2M SIM card (machine-to-machine ) must be used for modem communication. Standart SIM Card (phone call use with data included) often forbid machine to machine communication.


Also, problems have been encountered with SFR provider in France in FTPs port 21 (explicit). The solution for this particular case is to use the FTPs port 990 (implicit) mode.


Please pay attention to test the modem transmission before its deployement.

Any other questions ?

Contact us to:

nke Instrumentation
6 rue Gutenberg
ZI Kérandré
56700 Hennebont
+33 (0)2 97 36 41 31