RM502Q-AE failing and will not scan for networks

IoT Modules
1

I have 2 5G modules RM510Q-GL and RM502Q-AE. I use an m.2 to USB adapter connected to my laptop.

The RM510Q-GL connects and works as designed. On startup, the adapter flashes a green light indicating it is scanning for local towres for connection.

The RM502Q-AE which is brand new does not scan, the green light does not flash and will not connect.

I can send AT commands successfully. It appears there is a failure somewhere on the modem or in the firmware. I have flashed several different firmware versions all with the same result.

I have noticed running the AT commands:

AT+EGMR=0,5;+EGMR=0,7 ;+EGMR=0,10

RESULT:

+EGMR: “”

+EGMR: “867826050911296”

+EGMR: “8678260509112943”

OK

Here is a picture of the modem with the heatsink removed showing the modem ID’s.

IMG_0949
IMG_0949480×640 130 KB

Could the missing ID AT+EGMR=0,5 (Serial Number) cause the modem to fail?

2

Dear @Clinton_Phillips
DId you try to execute AT+CFUN=0 , AT+CFUN=1,then check if it will register or not.

3

AT+CFUN=0 , AT+CFUN=1

Both Commands return ERROR.

4

Dear @Clinton_Phillips
Could you try to execute AT+CFUN?
Did you do some specific procedure?like earse module during upgrade the firmware and others.Or please add serial number, then retry.

5

No Luck Connecting. Modem is not scanning for networks.

AT+CFUN=1
+CME ERROR: 0

AT+CFUN?
+CFUN: 0

OK

AT+CFUN=0
OK

Enter Serial Number as per Shield.

AT+EGMR=1,5,“MPY23CV31000730”
OK

Check Serial Number.

AT+EGMR=0,5
+EGMR: “MPY23CV31000730”

OK

Check IMEI Number

AT+EGMR=0,7
+EGMR: “867826050911296”

OK

Current Firmware Version

AT+QGMR
RM502QAEAAR13A03M4G_01.001.01.001

OK

Device Summary

T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=2c7c ProdID=0800 Rev= 4.14
S: Manufacturer=Quectel
S: Product=RM502Q-AE
S: SerialNumber=f31126f7
C:* #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=30 Driver=option
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=40 Driver=(none)
E: Ad=83(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=85(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=87(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
E: Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
E: Ad=88(I) Atr=03(Int.) MxPS= 8 Ivl=32ms
E: Ad=8e(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=0f(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms