RAK5860 LTE-M AT command set

JeroenKl · January 20, 2021, 5:56pm

I need to know which AT-command set I can use in order to change/make the Cellular_Ping example script configuration usable for KPN provider. (LTE-M)

I already changed the setting for KPN to:

AT+CGDCONT=1,“IP”,“kpnthings.iot”

BR,
Jeroen

JeroenKl · January 21, 2021, 5:41am

Dear @beegee,

Could you pinpoint me to the correct working related command set?

BR,
Jeroen

beegee · January 21, 2021, 7:00am

Please be patient.
In my country is no CAT-M or NB-IoT available, so I cannot test anything. But I will loop in one of my team members.

JeroenKl · January 21, 2021, 2:26pm

If you need help for testing purposes, please let me know.

marcio · January 21, 2021, 2:54pm

Hello @JeroenKl,
To help solve the problem could you please share the output of the serial console? After sending the command AT+QNWINFO

JeroenKl · January 21, 2021, 8:09pm

I’m testing with this code in order to get a LTE-M connection:

// should result in +CPIN: READY, if not sim pin is required
bg77_at(“AT+CPIN?”, 500);
delay(2000);
// frequency band
bg77_at(“AT+QCFG="band",1,80000,80000,1”, 500);
delay(2000);
// mode of operation
bg77_at(“AT+QCFG="iotopmode",0,1”, 500);
delay(2000);
// networkscan sequence
bg77_at(“AT+QCFG="nwscanseq",020202,1”, 500);
delay(2000);
// netwerk scan mode
bg77_at(“AT+QCFG="nwscanmode",3,1”, 500);
delay(2000);
// Roaming service (NOT WORKING)
//bg77_at(“AT+QCFG="roamservice",2,1”, 500);
//delay(2000);

// KPN (Dutch provider) LTE-M APN
bg77_at(“AT+CGDCONT=1,"IP","kpnthings.iot"”, 500);
delay(2000);
// operator selection (auto)
bg77_at(“AT+COPS=0,2”, 500);
delay(2000);
// restart modem
bg77_at(“AT+CFUN=1,1”, 500);
delay(2000);

// registration status: +CREG: 0,1 means registered
bg77_at(“AT+CREG?”, 500);
delay(2000);
// connected? +CGATT: 1 means connected
bg77_at(“AT+CGATT?”, 500);
delay(2000);
// bg77_at(“AT+CGATT=1”, 500);
// delay(2000);
// IP address (NOT WORKING)
bg77_at(“AT+CGPADDR?”, 500);
delay(2000);

bg77_at(“AT+QNWINFO”, 500);
delay(2000);
bg77_at(“AT+QCSQ”, 500);
delay(2000);
// Signal level like: +CSQ: 24,99 (not: 99,99)
bg77_at(“AT+CSQ”, 500);
delay(2000);
bg77_at(“AT+QIACT=1”, 500);
delay(2000);
}

Serial Output (NOT STABLE):

18:28:44.206 → RAK4630 Cellular TEST With KPN NL LTE-M sim card!
18:28:48.196 → BG77 power up!
18:28:48.715 →
18:28:48.715 → RDY
18:28:48.715 → ATI

18:28:48.715 → Quectel
18:28:48.715 → BG77
18:28:48.715 → Revision: BG77LAR02A02
18:28:48.715 →
18:28:48.715 → OK
18:28:48.715 →
18:28:51.208 →
18:28:53.696 →
18:28:53.696 → RDY
18:28:53.696 →
18:28:56.185 →
18:28:56.185 → RDY
18:28:56.185 → AT+QCFG=“iotopmode”,0,1

18:28:56.185 → OK
18:28:56.185 →
18:28:58.680 →
18:28:58.680 → RDY
18:28:58.680 →
18:29:01.173 →
18:29:03.669 →
18:29:03.669 → RDY
18:29:03.669 →
18:29:06.160 →
18:29:06.160 → RDY
18:29:06.160 → AT+CGDCONT=1,“IP”,“kpnthings.iot”

18:29:06.160 → OK
18:29:06.160 →
18:29:08.699 →
18:29:11.192 →
18:29:11.192 → RDY
18:29:11.192 →
18:29:13.670 →
18:29:13.670 → RDY
18:29:13.670 → AT+CREG?

18:29:13.670 → +CREG: 0,2
18:29:13.670 →
18:29:13.670 → OK
18:29:13.670 →
18:29:16.181 →
18:29:16.181 → APP RDY
18:29:16.181 →
18:29:18.665 →
18:29:18.665 → RDY
18:29:18.665 → AT+CGATT=1

18:29:21.182 →
18:29:21.182 → OK
18:29:21.182 → AT+CGPADDR?

18:29:21.182 → ERROR
18:29:21.182 →
18:29:23.675 → AT+QNWINFO

18:29:23.675 → +QNWINFO: “eMTC”,“20408”,“LTE BAND 20”,6400
18:29:23.675 →
18:29:23.675 → OK

18:29:26.168 → AT+QCSQ

18:29:26.168 → +QCSQ: “eMTC”,-80,-109,118,-13
18:29:26.168 →
18:29:26.168 → OK
18:29:26.168 →
18:29:28.666 → AT+CSQ

18:29:28.666 → +CSQ: 17,99
18:29:28.666 →
18:29:28.666 → OK
18:29:28.666 →
18:29:33.618 → AT+QIACT=1

18:29:33.618 → OK
18:29:33.618 →
18:29:35.586 → Begin receive packet from www.kpn.nl!
18:29:45.375 → AT+QPING=1,”1.1.1.1”,4,4

18:29:45.375 → ERROR

any advice?

BR,

Jeroen

marcio · January 21, 2021, 9:06pm

Hello @JeroenKl,
I can’t found the at command AT+QICSGP to configure APN

For example: Using hologram sim card

marcio · January 21, 2021, 9:15pm

@JeroenKl

“apn_name”, username, password

Set the APN to “hologram” with no username or password.

AT+QICSGP=1,1,"hologram","","",1

Then Activate the PDP context.

AT+QIACT=1

If ok you then you can establish the TCP connection and send AT+QPING

JeroenKl · January 22, 2021, 5:44am

Hi @marcio,

It looks like ‘Hologram’ isn’t the correct way in order to set the APN for KPN provider in the Netherlands. I made progress with:
AT+CGDCONT=1,“IP”,“kpnthings.iot” and AT+CGACT=1,1

Now I’m getting an IP address but still not able to ping the WAN network:

21:42:46.685 → AT+CGATT=1
21:42:46.685 → OK

21:42:51.196 → AT+CGDCONT=1,“IP”,“kpnthings.iot”
21:42:51.196 → OK

21:42:55.716 → AT+CGACT=1,1
21:42:55.716 → OK

21:43:00.194 → AT+CGPADDR=1
21:43:00.194 → +CGPADDR: 1,10.11.1.231
21:43:00.194 → OK

21:43:04.706 → AT+QNWINFO
21:43:04.706 → +QNWINFO: “eMTC”,“20408”,“LTE BAND 20”,6400
21:43:04.706 → OK

21:43:09.180 → AT+QCSQ
21:43:09.180 → +QCSQ: “eMTC”,-83,-111,117,-12
21:43:09.180 → OK

21:43:13.694 → AT+CSQ
21:43:13.694 → +CSQ: 15,99
21:43:13.694 → OK

21:43:18.205 → AT+QIACT=1
21:43:18.205 → OK

21:43:22.202 → Begin receive packet from www.kpn.nl!
21:43:31.945 → AT+QPING=1,”8.8.8.8”

21:43:31.945 → ERROR
21:43:31.945 →
21:43:32.976 → Begin receive packet from www.kpn.nl!

Why can I not ping to WAN (yet)?

BR,
Jeroen

carlrowan · January 22, 2021, 7:40am

Hi @JeroenKl,

Can you try “internet” as the APN? Where did you find “kpnthings.iot” as the APN for KPN?

JeroenKl · January 22, 2021, 8:25am

This APN is provided by KPN together with 2 test LTE-M sims I received.

carlrowan · January 22, 2021, 9:48am

I see. It seems if you will use their standard cellular connection (2G, 3G, LTE), you can use “internet” but you got an IoT sim for LTE-M that’s why you need to use kpnthings.iot. That’s how I understand it, I might be wrong.

Also, on your screenshot, you have multiple RDY replies from module. That can be an indicator that the module doesn’t not have a good power source.

marcio · January 22, 2021, 9:50am

Hello @JeroenKl,
Hologram is global sim card.
(Hologram
KPNThings has another APN.
Have you tested kpn sim card on cell phone?
For hologram sim card you need to activate it before using.

JeroenKl · January 22, 2021, 10:02am

I do not have Hologram SIM, but I have KPN LTE-M Sims with KPN APN which I need to use according KPN.
It is activated, I get a connection and IP address but cannot ping (error message)

JeroenKl · January 22, 2021, 10:03am

You are right, this is the case

JeroenKl · January 22, 2021, 10:06am

I’m using the Cellular_ping INO which requires a terminal connection. So the device is hooked up to my laptop.
I can change the setting so the device will run without a serial connection but then I cannot see if the ping is working.

I think it is time to provide a ‘example, solution’ script (INO)

JeroenKl · January 23, 2021, 7:10am

Hi @carlrowan,

Could you please check if the LTE-M (CAT-M1) functionality is tested thoroughly and confirmed it should work according specs?

BR,
Jeroen

carlrowan · January 23, 2021, 9:03am

Hi @JeroenKl,

Marcio already tested it on his hologram sim and it works. Quectel forum is a good reference as well if a user from Netherlands successfully used KPN LTE-M1 connection using BG77.

JeroenKl · January 23, 2021, 10:20am

Hi @carlrowan,

Thanks, of course I will not rest to have the KPN fixed so I’ll investigate further and keep you updated.
Any topic on Quectel forum you can pinpoint me regarding KPN LTE-M1?

Br,
Jeroen

marcio · January 25, 2021, 10:51am

@JeroenKl
The error message does not help much. You can add AT+CMEE=2 command to get more error details.
I also used the command AT+CFUN=1,0 before activate the PDP context.