SLM 2.4.0 + RAI

Ofir_A over 1 year ago

Hi,

We want to use RAI with SLM FW and not sure how to add it
I've read some tickets regarding it but still no walkthrough.

Here are the steps we do now:

1. Receive GPS fix

2. Connect to out server

3. Send data and GPS

4. Check shadow

5. Close connection

6. Send Sleep=2 command

After the sleep command there is a time when the modem is still active and consuming power, and when the network is release the current drops to what it should be (happen the same with PSM or EDRX)

We want to know how to add the RAI (in code or AT commands) that immediate after Sleep=2 the modem will go idle

Any guide regarding this issue?

We connect with MQTT (LTE-M)

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0 Øyvind over 1 year ago
Hello!

I've read some tickets regarding it but still no walkthrough.

No, there is no good walk-through, there is this blog post on DevZone Maximizing battery lifetime in cellular IoT: An analysis of eDRX, PSM, and AS-RAI .

We want to know how to add the RAI (in code or AT commands) that immediate after Sleep=2 the modem will go idle

There are two possible ways to enable RAI:

%XRAI = "CP-RAI" (only for NB-IoT, but not a really useful feature in practice)

%RAI = "AS-RAI" (Release 14 feature, saves a lot of power consumption by skipping the rrc inactivity timer)

When we are talking about RAI we are referring to the release 14 feature (enabled by %RAI)

You should be able to use AT command Release assistance indication %RAI to enable RAI on your device. And you can test this with a simple sample that my colleague Charlie made here.

Let me know how that works for you.

Kind regards,
Øyvind
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0 Ofir_A over 1 year ago in reply to Øyvind

Øyvind said:
When we are talking about RAI we are referring to the release 14 feature (enabled by %RAI)

You should be able to use AT command Release assistance indication %RAI to enable RAI on your device

I've already tried this with no effect

we don't know how and where to add the socket so I can inform it is the last message.

We do send sleep=2 when we finished so I want it to send the RAI too.

Øyvind said:
And you can test this with a simple sample that my colleague Charlie made here.

It is not relevant, we use TCP
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0 Øyvind over 1 year ago in reply to Ofir_A

Ofir_A said:
It is not relevant, we use TCP

The test would possibly confirm that you are able to enable RAI on your device i.e. that the network does allow RAI.

Ofir_A said:
I've already tried this with no effect

Please provide a modem trace for our modem team to look at.

Thank you.

Kind regards,
Øyvind
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0 Øyvind over 1 year ago in reply to Ofir_A

Ofir_A said:
It is not relevant, we use TCP

The test would possibly confirm that you are able to enable RAI on your device i.e. that the network does allow RAI.

Ofir_A said:
I've already tried this with no effect

Please provide a modem trace for our modem team to look at.

Thank you.

Kind regards,
Øyvind
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0 Ofir_A over 1 year ago in reply to Øyvind

Øyvind said:
Please provide a modem trace for our modem team to look at.

It's a little problematic with our product to get modem trace
will check something with the SW engineer and let you know on sunday
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0 Øyvind over 1 year ago in reply to Ofir_A

Yes, that is true. Hope that you are able to get one in an easy manner. You could also the sample that I suggested with the nRF9160DK, this should at least provide information on the network when using the same SIM card.

-Øyvind
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0 Ofir_A over 1 year ago in reply to Øyvind

Hi Øyvind,

Sorry it took time

I really tried to do all we can to get modem trace but it is not possible

The most I can give you is this:

[5/9 17:21:17:730] Ready
[5/9 17:21:19:095] [00:00:00.503,143] [0m<inf> nrf_modem_lib_trace: Trace thread ready[0m
[5/9 17:21:19:100] [00:00:00.504,699] [0m<inf> nrf_modem_lib_trace: Trace level override: 2[0m
[5/9 17:21:19:104] [00:00:00.504,730] [0m<inf> slm: Serial LTE Modem[0m
[5/9 17:21:19:110] [00:00:00.504,760] [0m<inf> slm_at_host: UART2 baud: 115200 d/p/s-bits: 3/0/1 HWFC: 1[0m
[5/9 17:21:19:119] [00:00:00.607,116] [0m<inf> slm_at_host: at_host init done[0m
[5/9 17:21:41:828] AT%REL14FEAT=0,1,0,0,0
[5/9 17:21:41:937] OK
[5/9 17:21:46:168] AT%RAI=1
[5/9 17:21:46:479] OK
[5/9 17:21:49:860] AT+CEREG=5
[5/9 17:21:51:043] OK
[5/9 17:21:55:948] AT%XBANDLOCK=2,"100"
[5/9 17:21:57:128] OK
[5/9 17:22:00:124] AT+CSCON=3
5/9 17:22:00:167] OK
[5/9 17:22:03:717] AT+CPSMS=1,"","","10100001","00001010"
[5/9 17:22:04:733] OK
[5/9 17:22:08:727] AT+CFUN=1
[5/9 17:22:09:298] OK
[5/9 17:22:10:818] +CEREG: 2,"198D","00048801",7
[5/9 17:22:10:822] +CSCON: 1,7,4
[5/9 17:22:12:342] +CEREG: 5,"198D","00048801",7,,,"00001010","11100000"
[5/9 17:22:13:992] AT#XSOCKETOPT=1,50
[5/9 17:22:15:382] ERROR
[5/9 17:22:15:382] [00:00:56.883,544] [1;31m<err> slm_sock: setsockopt(50) error: -9[0m
[5/9 17:22:21:079] AT%RAI=1
[5/9 17:22:21:467] OK
[5/9 17:22:24:486] AT#XSOCKETOPT=1,50
5/9 17:22:24:512] ERROR
[5/9 17:22:26:032] [00:01:07.378,509] [1;31m<err> slm_sock: setsockopt(50) error: -9[0m
[[5/9 17:22:27:552] +CSCON: 0,7,4
[5/9 17:31:45:717] AT+CEREG?
[5/9 17:31:45:908] +CEREG: 5,5,"198D","00048801",7,,,"00001010","11100000"
[5/9 17:31:45:912] OK
[5/9 17:31:48:583] AT+CFUN?
[5/9 17:31:48:952] +CFUN: 1
[5/9 17:31:48:952] OK
[5/9 17:32:02:597] AT#XNRFCLOUD=1
[5/9 17:32:04:167] OK
[5/9 17:32:04:167] +CSCON: 1,7,4
[5/9 17:32:06:951] AT#XSOCKETOPT=1,50
[5/9 17:32:07:212] ERROR
[5/9 17:32:07:212] [00:10:48.968,719] [0m<inf> slm_gnss: NRF_CLOUD_EVT_TRANSPORT_CONNECTED[0m
[5/9 17:32:07:216] [00:10:49.862,243] [1;31m<err> slm_sock: setsockopt(50) error: -9[0m
[5/9 17:32:08:731] #XNRFCLOUD: 1,0
[5/9 17:32:08:736] [00:10:50.305,175] [0m<inf> slm_gnss: NRF_CLOUD_EVT_READY[0m
[5/9 17:32:16:086] AT#XSOCKETOPT=1,50
[5/9 17:32:16:342] ERROR
[5/9 17:32:17:862] [00:10:58.997,436] [1;31m<err> slm_sock: setsockopt(50) error: -9[0m
5/9 17:32:25:471] +CSCON: 0,7,4
[5/9 17:32:26:152] AT+CFUN=0
[5/9 17:32:26:992] #XNRFCLOUD: 0,0
[5/9 17:32:28:516] [00:11:09.165,100] [0m<inf> slm_gnss: NRF_CLOUD_EVT_TRANSPORT_DISCONNECTED: status 3[0m
[5/9 17:32:28:521] OK
[5/9 17:32:28:521] +CSCON: 1,7,4
[5/9 17:32:28:525] +CEREG: 0
[5/9 17:32:28:525] +CSCON: 0,7,4

0 Achim Kraus over 1 year ago in reply to Ofir_A

I still consider, that AS-RAI requires much more user documentation. I don't know, why Nordic invest in advertisement for a feature, but then leaves the user without adequate documentation.

The log above shows me, that at least this user is suffering from the missing documentation.

AS-RAI in difference to CP-RAI is not something, which is configured completely ahead. In CP-RAI it's possible to enable "ONE-RESP" once and this gets then used until the configuration is changed. That's all done with %XRAI.

AS-RAI is different. It must be general enabled (using REL14FEAT and RAI), but then afterwards the application provides frequently the "LAST" or "NO DATA" via a socket option. For that socket you need to first establish the "connection". One downside I found is, that if the HTTP server already closes the connection, no AS-RAI option can be set. If you have a connection, then using the option should work.

I don't know, if XNRFCLOUD uses an socket, which is then accessible by the XSOCKETOPT cmd. If not, I guess, XNRFCLOUD doesn't support AS-RAI.
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0 Ofir_A over 1 year ago in reply to Achim Kraus

Thanks Achim

I've tried to use it when the connection is open after I exit data mode and before closing the connection and still ERROR.

Also after exiting data mode and closing connection there is still ERROR

The command AT#XSOCKETOPT=1,50 doesn't seems to work

[13/9 10:56:06:083] AT+CEREG=5
[13/9 10:56:06:814] OK
[13/9 10:56:08:973] AT+CPSMS=1,"","","10100001","00001010"
[13/9 10:56:09:858] OK
[13/9 10:56:11:033] AT+CSCON=3
[13/9 10:56:11:383] OK
[13/9 10:56:13:023] AT%REL14FEAT=0,1,0,0,0
[13/9 10:56:15:598] AT%RAI=1
[13/9 10:56:15:947] OK
[13/9 10:56:28:472] AT+CFUN=1
[13/9 10:56:29:647] OK
[13/9 10:56:31:167] +CEREG: 2,"198D","00048801",7
[13/9 10:56:31:167] +CSCON: 1,7,4
[13/9 10:56:31:172] +CEREG: 5,"198D","00048801",7,,,"00001010","11100000"
[13/9 10:56:36:177] AT#XMQTTCON=1,"..","","","..",8883,321
[13/9 10:56:40:297] OK
[13/9 10:56:40:297] #XMQTTEVT: 0,0
[13/9 10:56:43:841] AT#XMQTTPUB="..","",1
[13/9 10:56:44:861] OK
[13/9 10:56:50:381] test
[13/9 10:56:50:951] #XMQTTEVT: 3,0
[13/9 10:56:52:056] test
[13/9 10:56:53:996] #XMQTTEVT: 3,0
[13/9 10:56:58:908] +++
[13/9 10:57:00:081] #XDATAMODE: 0
[13/9 10:57:01:857] AT#XSOCKETOPT=1,50
[13/9 10:57:03:125] ERROR
[13/9 10:57:05:225] AT#XMQTTCON=0
[13/9 10:57:06:171] #XMQTTEVT: 1,0
[13/9 10:57:06:171] OK
[13/9 10:57:07:590] AT#XSOCKETOPT=1,50
[13/9 10:57:07:765] ERROR
[13/9 10:57:11:592] AT#XSLEEP=2
[13/9 10:57:12:256] OK
[13/9 10:57:14:607] low_power

Still takes 16-60 seconds to get RRC idle