RG200U 5G SA connection issue

IoT Modules 5G Module
1

Hi All,

I need help with a chat script to attach an RG200U modem to a 5G SA network.

I am using Airtel and Jio SIMs.
With 4G/LTE, the connection works perfectly.
However, when switching to 5G SA, the connection does not work as expected.

Current Behavior

  • The modem appears to attach to the network.
  • AT+C5REG? shows NOCONN, indicating network registration.
  • However, no IP address is assigned, and AT+CGDCONT? does not show any IP.
  • PPP never comes up successfully on 5G, while the same setup works fine on 4G.

Chat Script Used

ABORT   BUSY
ABORT   'NO CARRIER'
ABORT   ERROR
REPORT  CONNECT
TIMEOUT 10
""      "AT&F"
OK      "ATE1"
OK      'AT+QNWPREFCFG="all_band_reset"'
OK      'AT+QNWPREFCFG="mode_pref",$MODE_PREF'
OK      'AT+QNWPREFCFG="lte_band",$LTE_BAND'
OK      'AT+QNWPREFCFG="nr5g_band",$NR5G_BAND'
OK      'AT+CGDCONT=1,"$PDP_CONTEXT","$USE_APN"'
SAY     "Configuring 5G data (RG200U)"
TIMEOUT 30
OK      "AT+CGATT=1"
OK      "AT+CGACT=1,1"
OK      "AT+CGDATA="PPP",1"
CONNECT ' '

PPP Command

connect="${apn:+USE_APN=$apn }DIALNUMBER=$dialnumber PDP_CONTEXT=$pdp_context MODE_PREF=$MODE_PREF LTE_BAND=$LTE_BAND NR5G_BAND=$NR5G_BAND /usr/sbin/chat -t5 -v -E -f $chat" \
ppp_generic_setup "$interface" \
noaccomp nopcomp novj nobsdcomp noauth \
set EXTENDPREFIX=1 lock crtscts 115200 "$device" return 0

Any guidance, sample chat scripts, or known working configurations for RG200U + 5G SA would be greatly appreciated.

Thanks in advance.

3

I guess it is not connected to network. Did you try extensive network scan on your setup? You must verify that there are base stations with 5G SA from your operator. Also you should check extended error codes after 30s-1min like with AT+CEER.

I test different module. We found massive problems with some SIM cards for 5G SA in different locations. May be your SIM gets rejected too.

4

Dear @Shripad_Rayewar
Please share your current firmware.
Please share your test steps of PPP.