Telit HE910
Connect the Telit HE910 to Monogoto
The Telit HE910 is a compact cellular modem, supporting 3G/UMTS and includes GSM/GPRS fallback.
Prerequisites
Monogoto SIM
Telit HE910 of HE910-GL
Quick Navigation
Connect the HE910 to Monogoto
For Windows users. You need to install a driver to start using the Telit HE910. You can download the driver here (after signing up to Telit's website).
Keep the AT Commands manual next to you for more details about the commands. Click the PDF below to download the latest version.
Connect to the modem, enter the command: AT and wait for the response: OK
Reset the modem to its default configuration:
Set the error reporting to verbose, resulting in more descriptive error messages (optional):
Check the status of the SIM card. The correct response should be: +CPIN: READY
If you receive an error, the SIM may not be inserted properly or the SIM is protected with a PIN. By default, Monogoto SIMs are not PIN protected.
Query device information
Request the modem hardware version:
Request the modem firmware version:
Request the IMSI (International Mobile Subscriber Identity):
Request the ICCID (Integrated Circuit Card ID), which is the identification number of the SIM card
Network Configuration
It is possible to let the modem select the network automatically, or to manually define a network to connect with.
Option 1: Automatic Network Selection
To set the modem to automatic network selection enter the command:
Check the network and cellular technology the modem is currently using:
Expected response: +COPS: 0,0,"<name of operator>",X. The last digit indicates the cellular technology:
0 indicates 2G/GSM
2 indicates 3G/UTRAN
Option 2: Manual Network Selection
Start with searching for available networks:
It may take several minutes before the modem responds.
The modem responds with the names and the MCCMNC codes of the available networks. It also shows the cellular technologies the networks support:
To find which of the networks Monogoto has roaming agreements with, review the Coverage lists.
Check the network and cellular technology the modem is currently using:
Expected response: +COPS: 0,0,"<name of operator>",X. The last digit indicates the cellular technology.
Manually set the network and the cellular technology:
Replace XXXXX with the MCCMNC code of your operator, for example"20404" for Vodafone NL. Use 2 for UTRAN. It is possible to leave the value for setting the cellular technology out, allowing the modem to select the RAT by itself.
Check the radio signal strength and signal quality:
+CSQ returns 2 values separated by a comma. The first value represents the signal strength and provides a value between 0 and 31; a higher number indicates better signal strength. The second value represents the signal quality indicated by a value between 0 and 7, a lower value indicates better signal quality . If AT+CSQ returns 99,99, the signal is undetectable or unknown.
Define the cellular band(s) (optional)
It is possible to lock the modem to specific bands for specific technologies. This may result in a faster boot cycle as the modem does not need to scan for available bands at startup.
For details about the available bands, have a look at the AT Commands section 3.4.31.
To lock the modem a specific band, enter:
To test if the band was properly set, enter:
Network Activation
Set the APN to data.mono:
Validate if the APN is set correctly:
Expected response: +CGDCONT: 1,"IP","data.mono","0.0.0.0",0,0,0,0,0,0
Activate the PDP (packet data protocol) context:
Test if the PDP context is activated:
Expected response: +CGACT: 1,1
Validate if your device received an IP address:
Expected response: +CGPADDR: 1,XX.XXX.XX.XXX
Do you see an IP address? Congratulations! You’ve successfully connected the Telit modem to Monogoto 🎉
Have a look at the Things logs in the Monogoto Console to find more details about the established connection.
Test the connection by sending a PING
A PING test can be performed to test if the modem has an active data connection with a mobile network.
When cellular modems are idle for a long period of time, cell towers might drop the data connection to save resources. Sending regular PINGs is a good method for testing the data connection, as well as for keeping the connection alive because the operator registers your device as being actively used.
Activate a data connection for PDP index 1:
Expected response: #SGACT: 10.140.xx.xxx
Send 5 PINGs to IP address 8.8.8.8.
If the connection is active, you will see 5 PINGs with a number representing the response time in milliseconds. Example response:
Deactivate the PDP context after completing the PING test.
Expected response: OK
Great work on connecting the Telit HE910 to Monogoto! Have a look at the Things logs in the Monogoto Console to find more details about the established connection.
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