Hi Forum!
Hardware:
Quectel RM500U-EA
(in a ZBTlink ZBT-Z8105AX)
Problem:
After Reboot sometimes a Cell Tower and a Signal% are reported but ‘No Service’.
Then No Service and No Cell tower and No Signal either permanently.
And I never get an Internet connection.
Parameters:
Location: New Zealand
Provider: Vodafone
The SIM card is taken from my old 4G modem/router and is working (verified back and forth).
Service available:
- 4G - 700MHz (Band 28)
- 4G - 1800MHz (Band 3)
- 4G - 2100MHz (Band 1)
- 4G - 2600MHz (Band 7)
- 5G Band N7 (NR 2600MHz)
- 5G Band 78 (NR 3500MHz)-NSA
Diagnostic is hard because of the constant interference of the active shell scripts.
ATI
Quectel
RM500U-EA
Revision: RM500UEAAAR03A13M2G
AT+QICSGP=1
+QICSGP: 1,“vodafone”,“”,“”,0
AT+QNWPREFCFG=“mode_pref”
+QNWPREFCFG: “mode_pref”,LTE
AT+QNWPREFCFG=“gw_band”
+QNWPREFCFG: “gw_band”,2
AT+QNWPREFCFG=“lte_band”
+QNWPREFCFG: “lte_band”,1:3:7:28
AT+QNWPREFCFG=“nr5g_band”
+QNWPREFCFG: “nr5g_band”,77:78
AT+QCFG=“CLAT”
+QCFG: “clat”,0
AT+QCFG=“nat”
+QCFG: “nat”,0
+CPIN: READY
Result of Reset Bands, Network Search Auto:
| Module | Quectel RM500U-EA |
| IMEI | xxx |
| ICCID | xxx |
| APN | vodafone |
| PIN | READY |
| NetSearch mode | AUTO |
| BAND | 3G: 1:2:5:8 4G: 1:2:3:4:5:7:8:20:28:40:41:66 5G: 1:3:5:7:8:20:28:66:38:40:41:77:78 |
| Current Freq Band | +QNWINFO: No Service |
| Cell Info | Cell Physical ID: 95 |
| ISP | No Service |
| Signal | 72% |
Question: I need a reliable way to diagnose the module.
I can’t find anything in the FAQs besides
Debug level output with
AT+QCFG=“dbgctl”,0
which seems to be ignored/has no effect?
Also a more recent firmware may help?
Thanks in Advance.