SIMCom SIM8230G 5G RedCap
The SIMCOM SIM8230G-M2 is a 5G RedCap module based on 3GPP Release 17, designed for power-efficient mid-speed applications. It supports 5G SA (Standalone) mode and LTE Cat 4 fallback, with reduced bandwidth and lower complexity, making it ideal for IoT and industrial use cases

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Prerequisites
Monogoto SIM
SIMCom SIM8230G-M2 5G RedCap cellular modem
Access to a private network
Connect the SIM8230G-M2 5G RedCap to Monogoto
Connect to the modem, enter the command: AT
and wait for the response: OK
Reset the modem to the factory default configuration:
AT+CFUN=1,1
Set the error reporting to verbose, resulting in more descriptive error messages (optional):
AT+CMEE=2
Check if the SIM card is attached and is not locked with a PIN, expected response: +CPIN: READY
:
AT+CPIN?
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:
AT+CGMM
Request the modem firmware version:
AT+CGMR
response:
+CGMR: 2310B02X35M22A-M2
Request the IMSI (International Mobile Subscriber Identity):
AT+CIMI
Request the ICCID (Integrated Circuit Card ID), which is the identification number of the SIM card
AT+ICCID
Network mode preference.
Manually set the preference mode:
AT+CNMP=71
→ Enables 5G NR along with LTE, UMTS, and GSM (multi-mode operation).AT+CNMP=13
→ Typically enables LTE/UMTS/GSM only (no 5G).
To test if the network is set correctly enter:
AT+CNMP?
Expected response: +CNMP:71
IMS (IP Multimedia Subsystem)
Manually set the IMS disable
AT+CNV=0
Network Configuration
Manually set the network:
Monogoto's private LTE network is indicated with the MCCMNC code: 99974
. To connect to the private LTE network, enter:
AT+COPS=1,2,"99974",11
To test if the network is set correctly enter:
AT+COPS?
Expected response: +COPS: 0,0,"Monogoto5G 99974",11
11
indicates that the modem is using 5G SA.
Check the radio signal strength and signal quality:
AT+CSQ
Example response: +CSQ: 22,1
Network Activation
Set the APN to data.mono
:
AT+CGDCONT=1,"IP","data.mono"
To test if the APN is set correctly, enter:
AT+CGDCONT?
Expected response: +CGDCONT: 1,"IP","data.mono","0.0.0.0",0,0,0
Activate the PDP (packet data protocol) context:
AT+CGACT=1,1
Test if the PDP context is activated:
AT+CGACT?
Expected response: +CGACT: 1,1
Request Serving Cell Information
AT+CPSI?
Example response:
+CPSI: NR5G_SA,Online,999-74,0x2,16385,5,NR5G_BAND78,638592,-690,-110,39
99974
(the fourth value) indicates that the device being connected to Monogoto's Private LTE Network78
represents the cellular band the modem is currently using
Validate if your device received an IP address:
AT+CGPADDR
Expected response: +CGPADDR: 1,10.XXX.XX.XXX
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.
Send 4 PINGs to IP address Google
:
at+cping="www.google.com",1,4,64,1000,10000,255
Example response:
+CPING: 1,142.250.75.164,64,23,255
+CPING: 1,142.250.75.164,64,27,255
+CPING: 1,142.250.75.164,64,17,255
+CPING: 1,142.250.75.164,64,16,255
Do you see an IP address? Congratulations! 🎉 You’ve successfully connected the SIM8230G-M2 5G RedCap modem 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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