Replacing Wavelet 3 SIM Card

You can replace the SIM card in your device when you need to change the data service provider or when the SIM card is defective. Wavelet 3 has one SIM card.



Replacement steps

  1. Steps in the UI
  2. Steps in the Device
  3. Steps in the UI

Post-replacement steps

Create a Device Trace

Use AK commands



  1. You must have a torque screwdriver. 
  2. Make sure you have a Micro-USB cable and a laptop.
  3. Ensure that the Micro-USB cable is functioning correctly by testing connectivity between another device (not a Wavelet) and your laptop.
  4. Download PuTTY terminal emulation software to the laptop. If the SIM replacement is unsuccessful, Support will need to access the Wavelet.
  5. The Wavelet uses a Micro-SIM card (3FF Sim Card). Ensure that you use an appropriately sized SIM card.


  1. Write down (or photograph) the new SIM’s PIN and PUK numbers, the new SIM’s APN address, and the Wavelet’s serial device number.
  2. Initially, the Wavelet must be turned on. If the device is in hibernation mode, wave the magnet Activator key over the embossed logo on the face of the device until the LED lights flash.

Replacement steps

 1. Steps in the UI

1.   Send a command to remotely change the SIM card’s APN address. Do the following steps:

    1. Click Devices in the left pane.
    2. In the Sites Tree pane, select the device whose SIM you are replacing.
    3. In the Configuration tab on the right, expand the ADVANCED DEVICE  CONFIGURATION tree, and select GSM.
    4. Click the gsm_apn parameter in the tree.
    5. Click Set Setting to change the value to the APN of the new SIM. For our example, suppose that the current APN is The new APN will be

             A change-gsm-apn command will be generated, and the device will receive and execute the command at the next transmission.

2.  (Optional) Type in a username and password for the SIM card by editing the value of gsm_apn_user and gsm_apn_pass.         

3.   In the Configuration tab, click the green box in the TRANSMISSION INTERVAL pane to open  the Select Transmission Interval window.

4.   Change the Transmission Interval to 10 minutes by  moving the slider to 10 min, and then clicking Submit.

5.    Under the Wavelet picture at the top of the screen, click Actions, and then select Reboot.

6.    In the Commands tab, verify that the commands “Set Reporting Interval”, “Set General Setting”, and “Reboot” that were sent thus far have been received. Wait until all three commands’ Status is 100% before proceeding.

7.    In the Configuration tab, check that the new APN was accepted. Repeat steps 1-c and 1-d.  You should see the former APN and the new APN listed.

2. Steps in the Device

1.    Partially unscrew the six screws located on the back of the Wavelet enclosure, until you can lift off the back panel with the screws still affixed to their screw holes.

2.    On the interface board, power off the device by moving the ON/OFF switch to the OFF position.


3.    Disconnect the battery cable from the interface board.


WARNING:  Failure to do steps 2 and 3 might cause a short circuit in the device.


4.    Remove the four internal screws, and then pull up the plastic casing.

Warning: Do not remove the rubber gasket that sits inside the rim of the back panel. The gasket is thin and not glued to the back panel.


5.    Unplug the red and black wires from the underside of the plastic casing to allow easier  access to the SIM card. Set the casing to the side.



The following picture shows the inside of a Wavelet 3. The SIM card is framed in red.


6.    On the SIM card tray holder, note the Lock  and Unlock   icons.  Slide the cover that is over the SIM card toward the Unlock direction. The cover will pop open.

7.    Remove the original SIM card and put in the new one. Slide the tray holder cover toward  the Lock direction to lock SIM. The cover will snap closed.

8.    Reconnect all wiring. Put the plastic casing back into place. Screw the four internal screws back in. Reconnect the battery.


Note: Do not turn the device on yet.


3. Steps in the UI

  1. In the Configuration tab on the right, expand the ADVANCED DEVICE CONFIGURATION tree, and then select the GSM.
  2. Click the gsm_done_onetime_setup parameter in the tree.
  3. Click the value, and then select Set Setting. Change the value to 0.
  4. Turn the device on.
  5. In the Commands tab, wait for the command Set General Setting to reach Status of 100%.
  6. Turn the device off.
  7. In the Configuration tab, click the green box in the TRANSMISSION INTERVAL pane. Change the Transmission Interval back to 1 hour by moving the slider to 1h, and then clicking Submit.
  8. Under the Wavelet picture at the top of the screen, click Actions, and then select  Hibernate.
  9. Turn the device on.
  10. In the Commands tab, wait for both commands to reach Status of 100%. The SIM card replacement process is complete.

Post-replacement steps

  1. Replace the back panel and tighten the six screws with a torque of 4.5 Nm. Do not over-tighten because this will strip the screw threads.
  2. Wait 5-10 minutes for the device to perform a calibration process, and then to start transmitting to the Ayyeka cloud server.
  3. In the Ayyeka the UI, check whether the device is transmitting.
    • If the device is transmitting, the SIM was successfully replaced. No further action is needed.
    • If the device is not transmitting, contact Ayyeka Support. They will ask you to create a device trace or to use AK commands.

Create a Device Trace

Do the following steps:

  1. On your laptop, open Device Manager and check if there are any Ports (COM & LPT). This section might be missing if no ports are connected, as shown below.

2.   Discover the COM port of the device by doing the following steps:
    1. Open the Wavelet, and then stand the battery on its side to expose the USB port. Do not disconnect the battery from the interface board.
    2. Connect the Micro-USB cable to the device’s Interface Board and to your laptop.

Important: At the USB port side in the Wavelet, be careful that the cable does not pull up. Upward tension on the USB port might disconnect the port from the Wavelet’s interface board.


             c.   Wait for the Windows Plug & Play Drivers to be installed on your laptop. For any driver problems, see FTDI Chip Installation Guides.

            d.   Refresh the Device Manager. The Ports (COM & LPT) should now appear. The COM port appearing in the USB Serial Port line is the device’s COM port.

3.   Double-click putty.exe to open a PuTTY terminal.

4.   Configure the following parameters:

    • Connection type - Serial
    • Serial line – The COM port that was added after micro USB connection
    • Speed – 9600 Bauds per second


5.   Click Open to display the device trace.

6.   Contact Support to enable a remote session of your laptop.


Use AK commands

If the SIM card was misconfigured in the Ayyeka the UI so that now there is no communication with the UI, you can use AK commands to correct the configuration. AK commands communicate directly with the Wavelet rather than going through Ayyeka the UI. 


Misuse of AK commands might render the Wavelet unusable. For this reason, typically only Partners and Support personnel doing remote integration with the Wavelet use AK Commands.

Do the following steps:

  1. Follow the steps to Create a Device Trace.
  2. Notify Support that the Wavelet is connected so that Support can confirm. AK Commands in the following table can now be entered at the command prompt.





cmd ak3.CMD_SETTING_SET 0 0x1 1 8 1 0 0 7 7 "APN_for_SIM"


cmd ak3.CMD_SETTING_SET 0 0x1 1 9 1 0 0 7 7 "SIM_user_name"


cmd ak3.CMD_SETTING_SET 0 0x1 1 10 1 0 0 7 7 "SIM_password"

One Time Init

cmd 4 0 0x1 1 7 1 0 0 0 0 0