Manual configuration of modems using AT commands is often necessary for initial device setup, troubleshooting, and verifying behavior. While Soracom IoT SIMs handle authentication automatically if the network allows it, you typically need to configure the Access Point Name (APN) and may need to adjust radio settings to establish a connection.
Common Configuration Tasks
You generally need to interact with the modem to perform the following:
-
Configure the APN: You must specify Soracom's APN (
soracom.io) in the PDP Context configuration to establish a data connection. - Enable Radio Technologies: For some devices (especially Cat-M1/NB-IoT), you may need to manually enable specific radio technologies or frequency bands if they are disabled by default.
- Troubleshooting: AT commands allow you to check if the modem detects the SIM, verify network registration, and inspect signal quality.
Authentication Settings
Because Soracom verifies connectivity based on SIM authentication, there is generally no need to manually configure username and password settings.
However, if your modem's manual explicitly recommends configuring authentication, you can use the following parameters:
-
Username:
sora -
Password:
sora -
Authentication Type:
PAP,CHAP, orAutomatic
Safety Considerations
While configuration is often required, you should proceed with caution. Incorrect parameters can leave the modem in a state that requires a factory reset to recover.
Before sending commands, consider the following:
- Consult the Manual: Always have your modem's AT command manual available. Commands vary by manufacturer and firmware version.
- Persistent Settings: Some commands change settings that survive a reboot. Incorrect values can prevent the modem from reconnecting.
-
Connection Loss: Commands that disable the radio (like
AT+CFUN=0) will immediately drop active connections, potentially making remote devices unreachable.
For more details on standard commands and safety, refer to the AT Commands documentation.