Implement URC Handling. (IDFGH-8812) #180

diplfranzhoepfinger · 2022-11-24T12:17:23Z

also discussed in:

#156

#168

#179

diplfranzhoepfinger · 2022-11-24T12:17:46Z

@david-cermak

franz-ms-muc · 2022-12-01T08:45:28Z

also in the Modem Console URC might be helpful:
see here:

issuing a extra cmd AT does not really look smart.

david-cermak · 2022-12-01T17:56:07Z

This could be implemented the same way as #156, i.e. installing a permanent callback which would check for a global set of URC first and only after that for replies to requests. So we could still create a DCE class that's command-able (=could add commands) and at the same time handles the URCs.

I'll prepare a simple demo.

franz-ms-muc · 2022-12-01T19:51:03Z

Thanks so much. Meisterschulen am Ostbahnhof Mühldorfstr. 6 81671 München Tel.: 089 416002 - 0 Fax: 089 416002 - 111 Internet: www.meisterschulen-münchen.de<http://www.meisterschulen-mchn.de>

franz-ms-muc · 2022-12-13T09:04:04Z

I'll prepare a simple demo.

any Progress @david-cermak ?

david-cermak · 2022-12-19T10:45:06Z

Added as c61fe1f

it's very simple and WIP. It only adds a user callback that could handle all received data. (needs to be removed before switching modes and applied again after)

The other option is to reuse CMUX mode for that, we already have two virtual terminals, so we could make another one for handling URC. Unfortunately the DTE/CMUX classes are not fully designed to support variable number of virtual terminals, but that would be an interesting addition.

diplfranzhoepfinger · 2023-01-13T08:05:47Z

i will test it.
have a Good Test-case here:

a SIMCOM A7672E-FASE

we can send here a AT+CGNSSPWR=1 command,
and it will answer with a URC of +CGNSSPWR: READY!

will test now...

diplfranzhoepfinger · 2023-01-13T08:29:08Z

your URC Handler works:

franz-ms-muc · 2023-02-20T14:14:30Z

Hi,

Question: (from Vasil Nikolov)

I understand the URC implementation following way:

You can switch on/off the reaction on URC
a. This is nice
ESP Modem receives all of the URC
a. For me it is important to understand how modem implementation differentiates between URCs and a normal response to AT commands
i. There are commands which require longer time until a response is received.
b. Can we receive URCs while we are waiting for a response to a certain AT Command?
i. If yes then how can we be sure that responses to the AT Commands are forwarded to the URC handler instead to the command handler
In our user code we shall define one URC handler with a switch case based on the data and length of received URC
a. This is a nice approach, we have full control over all URCs we are interested in

VasilNikolovRilabs · 2023-02-28T11:48:41Z

@david-cermak could you please provide some feedback about the last questions from Franz?
We would like to really assure that the URC implementation wont impact the normal AT command request/response handling

Thank you!

david-cermak · 2023-03-02T16:14:08Z

Hi Franz and Vasil,

sorry for not responding earlier.
The example of injecting a URC callback doesn't really change anything in the esp_modem layers, it just overrides the default command implementation using these two methods:

Traditional method for sending commands makes the class command-able, so it could be employed by the command library to run all/defined AT commands:

esp-protocols/components/esp_modem/examples/modem_console/main/my_module_dce.cpp

Line 51 in c61fe1f

    
           command_result Shiny::DCE::command(const std::string &cmd, got_line_cb got_line, uint32_t time_ms, const char separator)

The data callback that processes the replies

esp-protocols/components/esp_modem/examples/modem_console/main/my_module_dce.cpp

Line 70 in c61fe1f

command_result Shiny::DCE::handle_data(uint8_t *data, size_t len)

This way, we're able to

first call the user urc-callback (and after that)
continue with processing the replies by the command library

a. For me it is important to understand how modem implementation differentiates between URCs and a normal response to AT commands

we process the user callback first

esp-protocols/components/esp_modem/examples/modem_console/main/my_module_dce.cpp

Lines 73 to 75 in c61fe1f

    
           if (handle_urc) { 
        
               handle_urc(data, len); 
        
           }

...and then let the command library to parse the same data.

esp-protocols/components/esp_modem/examples/modem_console/main/my_module_dce.cpp

Lines 76 to 87 in c61fe1f

    
           if (handle_cmd) { 
        
               auto ret = handle_cmd(data, len); 
        
               if (ret == esp_modem::command_result::TIMEOUT) { 
        
                   return command_result::TIMEOUT; 
        
               } 
        
               if (ret == esp_modem::command_result::OK) { 
        
                   signal.set(1); 
        
               } 
        
               if (ret == esp_modem::command_result::FAIL) { 
        
                   signal.set(2); 
        
               } 
        
           }

i. There are commands which require longer time until a response is received.

You need to be aware that the urc handler would still received all the replies, including the ones that belong to unrelated commands issued by the command library (by user)

b. Can we receive URCs while we are waiting for a response to a certain AT Command?

Yes, the urc-handler gets always called (if enabled). The other part (lib-command processing) is called only if an AT command is in progress.

i. If yes then how can we be sure that responses to the AT Commands are forwarded to the URC handler instead to the command handler

This works like a fork (tee command in bash :-), we pass the same data to two handlers

The only trouble might be the time, physically spent on processing the urc responses, since it actually delays processing the simultaneously active AT command. This wouldn't delay data reception, but might influence timeouts of the defined commands.
(for example, if we're sending AT+CGC\r with timeout of 500ms and spend 600ms on urc processing, then it would fail, but should still work if we spend like 450ms on urc-processing, as the actual reply would simply queue so the data handler should make it in time)

VasilNikolovRilabs · 2023-03-02T16:45:19Z

Hello David, thank you for the detailed explanation, what you really describe is a very good approach for the URC and it really makes sure that the command handling will not be broken. As last takeout from your notes – we need to make sure that the URC handler is a very short and thus we will not impact the timeout handling of the AT commands. Thank you again for the support! Best Regards, Vasil Nikolov CEO and CO-Founder Email: ***@***.******@***.***> Phone: +359 888 200510 Banat 1 1407 Sofia Bulgaria ***@***.*** www.rilabs.io<http://www.rilabs.io/> From: david-cermak ***@***.***> Sent: Thursday, March 2, 2023 6:14 PM To: espressif/esp-protocols ***@***.***> Cc: Vasil Nikolov ***@***.***>; Comment ***@***.***> Subject: Re: [espressif/esp-protocols] Implement URC Handling. (IDFGH-8812) (Issue #180) Hi Franz and Vasil, sorry for not responding earlier. The example of injecting a URC callback doesn't really change anything in the esp_modem layers, it just overrides the default command implementation using these two methods: 1. Traditional method for sending commands makes the class command-able, so it could be employed by the command library to run all/defined AT commands: https://github.com/espressif/esp-protocols/blob/c61fe1f5f915b2d39dda81ea8ce701660991194c/components/esp_modem/examples/modem_console/main/my_module_dce.cpp#L51 1. The data callback that processes the replies https://github.com/espressif/esp-protocols/blob/c61fe1f5f915b2d39dda81ea8ce701660991194c/components/esp_modem/examples/modem_console/main/my_module_dce.cpp#L70 This way, we're able to * first call the user urc-callback (and after that) * continue with processing the replies by the command library

…

________________________________ a. For me it is important to understand how modem implementation differentiates between URCs and a normal response to AT commands we process the user callback first https://github.com/espressif/esp-protocols/blob/c61fe1f5f915b2d39dda81ea8ce701660991194c/components/esp_modem/examples/modem_console/main/my_module_dce.cpp#L73-L75 ...and then let the command library to parse the same data. https://github.com/espressif/esp-protocols/blob/c61fe1f5f915b2d39dda81ea8ce701660991194c/components/esp_modem/examples/modem_console/main/my_module_dce.cpp#L76-L87 i. There are commands which require longer time until a response is received. You need to be aware that the urc handler would still received all the replies, including the ones that belong to unrelated commands issued by the command library (by user) b. Can we receive URCs while we are waiting for a response to a certain AT Command? Yes, the urc-handler gets always called (if enabled). The other part (lib-command processing) is called only if an AT command is in progress. i. If yes then how can we be sure that responses to the AT Commands are forwarded to the URC handler instead to the command handler This works like a fork (tee command in bash :-), we pass the same data to two handlers The only trouble might be the time, physically spent on processing the urc responses, since it actually delays processing the simultaneously active AT command. This wouldn't delay data reception, but might influence timeouts of the defined commands. (for example, if we're sending AT+CGC\r with timeout of 500ms and spend 600ms on urc processing, then it would fail, but should still work if we spend like 450ms on urc-processing, as the actual reply would simply queue so the data handler should make it in time) — Reply to this email directly, view it on GitHub<#180 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AISW2OROTO7EKPSAGUUAFNTW2DBNXANCNFSM6AAAAAASKKZCCY>. You are receiving this because you commented.Message ID: ***@***.******@***.***>>

franz-ms-muc · 2023-03-12T15:08:20Z

https://gist.github.com/franz-ms-muc/b28a70d42a86bb2ed292e638a11fa152

i test the URC HAndler now in the CMUX Sample.
it is installed in this Line:
https://gist.github.com/franz-ms-muc/b28a70d42a86bb2ed292e638a11fa152#file-gistfile1-txt-L257

but then never called. However, as i have extended Logging active, i see the URCs are coming in.

however when i was testing it with the Console Sample it was working.

think there is something to fix still.

franz-ms-muc · 2023-03-12T15:41:54Z

another Log with Net:
https://gist.github.com/franz-ms-muc/454ecbf8fbbfabfaeb27f68b54ea98b3

franz-ms-muc · 2023-03-21T16:11:45Z

@david-cermak did you look into this ?

david-cermak · 2023-03-21T16:56:24Z

@franz-ms-muc Could you please also share the code where you install the handler?
Note that the change has already been merged to master (and release as modem-v1.0.0), so you should be able to play with URC directly in the console example. Does it work for you in the default example?

franz-ms-muc · 2023-03-21T16:57:56Z

Ah, thanks, i will look into the new master. Cool. Von: david-cermak ***@***.***> Gesendet: Dienstag, 21. März 2023 17:57 An: espressif/esp-protocols ***@***.***> Cc: Franz Höpfinger ***@***.***>; Mention ***@***.***> Betreff: Re: [espressif/esp-protocols] Implement URC Handling. (IDFGH-8812) (Issue #180) @franz-ms-muc<https://github.com/franz-ms-muc> Could you please also share the code where you install the handler? Note that the change has already been merged to master (and release as modem-v1.0.0<https://github.com/espressif/esp-protocols/releases/tag/modem-v1.0.0>), so you should be able to play with URC directly in the console example. Does it work for you in the default example<https://github.com/espressif/esp-protocols/tree/master/components/esp_modem/examples/modem_console>? — Reply to this email directly, view it on GitHub<#180 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AQSZUH2UNRFN3WNLQAD346DW5HMUHANCNFSM6AAAAAASKKZCCY>. You are receiving this because you were mentioned.Message ID: ***@***.******@***.***>> [https://www.meisterschulen-mchn.de/images/meisterschulen/allgemein/4-logos/logofc.jpg] Meisterschulen am Ostbahnhof Mühldorfstr. 6 81671 München Tel.: 089 416002 - 0 Fax: 089 416002 - 111 Internet: www.meisterschulen-münchen.de<http://www.meisterschulen-mchn.de>

david-cermak · 2023-03-24T15:59:05Z

Could you please close this issue if it work for you? Or comment and share the details if URC handling doesn't work as expected.

diplfranzhoepfinger · 2023-03-31T10:16:59Z

hi,

i tested like this:

use this Commit:
diplfranzhoepfinger@0a33ce5

and the Outcome is this Log:
https://gist.github.com/diplfranzhoepfinger/73da3e69cbee3edbaaa61def2f50eba1

+CGNSSPWR: READY!

is a URC.
it is not handeled by the URC Handler.

diplfranzhoepfinger · 2023-03-31T10:19:30Z

making another Try:

https://gist.github.com/diplfranzhoepfinger/6a3062d8861535f2b3927cdc6e5d299f

there the URC Handler works.

it seems the URC HAndler only works on "cmd xx"
and not on "build in" commands.

pls look into this.
Thanks !
Franz

diplfranzhoepfinger · 2023-04-22T08:37:15Z

@david-cermak can you have a look into this ?

Thanks!

diplfranzhoepfinger · 2023-05-19T15:22:43Z

so, Test also URC Handling with latest Sample:

https://github.com/diplfranzhoepfinger/esp-protocols-tree-master-components-esp_modem-examples-simple_cmux_client

diplfranzhoepfinger · 2023-05-19T16:31:51Z

at least seems working:

https://github.com/diplfranzhoepfinger/esp-protocols-tree-master-components-esp_modem-examples-simple_cmux_client/tree/feature/URC_Handling

diplfranzhoepfinger · 2023-05-19T16:32:23Z

https://gist.github.com/diplfranzhoepfinger/359e821d89635118333169d75226fe55

diplfranzhoepfinger · 2023-05-19T16:54:26Z

with the A7672 it does not work:

see https://github.com/diplfranzhoepfinger/esp-protocols-tree-master-components-esp_modem-examples-simple_cmux_client/tree/feature/A7672_gnss

diplfranzhoepfinger · 2023-05-19T17:00:57Z

Try to switch to "Shiny" again:

https://github.com/diplfranzhoepfinger/esp-protocols-tree-master-components-esp_modem-examples-simple_cmux_client/tree/feature/shiny_again

diplfranzhoepfinger · 2023-05-19T17:04:18Z

so we have:

URC Handler working:

https://github.com/diplfranzhoepfinger/esp-protocols-tree-master-components-esp_modem-examples-simple_cmux_client/tree/feature/shiny_again

URC Handler not working:

https://github.com/diplfranzhoepfinger/esp-protocols-tree-master-components-esp_modem-examples-simple_cmux_client/tree/feature/A7672_gnss

diplfranzhoepfinger · 2023-06-15T09:12:19Z

and YEAH !!!! the URC Handler runs on the A7672

log here:

https://gist.github.com/diplfranzhoepfinger/2d663b68e47f5cbf7a11a980548166ee

i think it is a cool Feature !

now must implement the 2nd Layer above the URC Handler, a "URC Handler Parser"

diplfranzhoepfinger · 2023-06-15T09:20:19Z

@timbo100 you can see my Cmux - Example, there i got it working.

timbo100 · 2023-06-15T15:18:56Z

@diplfranzhoepfinger and team, thanks.

while connected to a SIM7600 modem, I changed modem type to SHINY and it worked... I got connected, IP address, and tested the comm with mqtt broker.

I really want to test sending an SMS Text message, does anyone know how to use the console to do this since that command is rather complicated???

It's unclear to me, other than new functionality added to custom modem, what the difference is between a SIM7600 vs SHINY. It would seem then that the Generic Modem is very close to SIM7600(?).

Very much appreciated.

pavellevitsky · 2023-11-14T11:49:50Z

Switch modem from SIM76000 to SHINY - how?
Using menuconfig (Development Framework Configuration) --> Connect configuration ?
There is no SHINY in the list...

david-cermak · 2023-11-28T16:41:37Z

While this is supported in the example by creating a custom module, it's not very user friendly.
I've added a new milestone and will support URC in a better way, directly in the library.

diplfranzhoepfinger · 2023-12-13T09:15:22Z

Hi @david-cermak

Added as c61fe1f

it's very simple and WIP. It only adds a user callback that could handle all received data. (needs to be removed before switching modes and applied again after)

this was working well with the CMUX Example.
but now we switched to the Dual Channel USB Example.
how to add the same URC Handler in this Example ?

https://github.com/espressif/esp-protocols/tree/master/components/esp_modem/examples/pppos_client

I mean one Problem is it is C, so the Syntax will be different.
But we would more like to stay in C.

Thanks,
Franz

david-cermak · 2023-12-21T06:41:43Z

Hi Franz,

If you want to use the idea in the modem example, you'd have to stay with C++.
You can use Dual channel mode in C++, just need to create the DTE and DCE separately (same as in other C++ examples). You can check the USB example and the C-API wrappers.

(as mentioned above, I'd like to add URC handler support to the library itself, so those overrides and customized factories won't be needed, planned for modem-v1.2 )

diplfranzhoepfinger · 2024-02-06T12:49:23Z

does this mean:
if we want to stay with C, it will be possible with 1.2
if we swith the pppos_client Sample to C++ we can do it like now.

david-cermak · 2024-02-09T07:42:10Z

does this mean: if we want to stay with C, it will be possible with 1.2 if we swith the pppos_client Sample to C++ we can do it like now.

Yes, it means that the URC will be an official API. The solution I offered before was just a workaround, and since the C++ implementation is very modular, we were able to simply inject a handler without changing the library code (100% user space)

Closes espressif#180

VasilNikolovRilabs · 2024-09-17T08:50:55Z

Hello, Could you please check which URC solution was proposed by ESP? Best Regards, Vasil Nikolov CEO and CO-Founder Email: ***@***.******@***.***> Phone: +359 888 200510 Banat 1 1407 Sofia Bulgaria ***@***.*** www.rilabs.io<http://www.rilabs.io/> From: david-cermak ***@***.***> Sent: Tuesday, September 17, 2024 10:55 AM To: espressif/esp-protocols ***@***.***> Cc: Vasil Nikolov ***@***.***>; Comment ***@***.***> Subject: Re: [espressif/esp-protocols] Implement URC Handling. (IDFGH-8812) (Issue #180) Closed #180<#180> as completed via #620<#620>. — Reply to this email directly, view it on GitHub<#180 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AISW2ORFBS7OKYY5IXEUQSTZW7N35AVCNFSM6AAAAAASKKZCC2VHI2DSMVQWIX3LMV45UABCJFZXG5LFIV3GK3TUJZXXI2LGNFRWC5DJN5XDWMJUGI4DMMRXGIYDOMQ>. You are receiving this because you commented.Message ID: ***@***.******@***.***>>

Closes espressif#180

1.2.0 Features - Add support for guessing mode (52598e5) - Delete CMUX internal implementation even if terminal exit fails (0e0cbd6) - Add support for handling URC (1b6a3b3, espressif#180) - add ability to change ESP_MODEM_C_API_STR_MAX from Kconfig (1790989) - Added target test config with CHAP authentication (f8ae7de) - example add esp32p4 usb support (adafeae) - Publish mbedtls component (0140455) - host test support of the latest ESP-IDF release (3f74b4e) Bug Fixes - Fix console example to use urc/detect features (1a9eaf3) - Update target test builds to use external Catch2 (554f022) - Fix arguments names when spawn esp_modem_xxx declarations (b6792c5) - Remove catch dependency (c348076) - Examples: use local configs for MQTT topic/data (f5c13b9) - Fixed clang-tidy warnings (70fa3af) - Fix CI build per IDFv5.3 (d0c17ef) - Fixed UART task to check for buffered data periodically (4bdd90c, espressif#536) - Cleanup unused configs from PPPoS example (08a62cc) - Update CMUX example with SIM7070_gnss cleaned-up (56fe532) - Update console example with SIM7070_gnss format comments (5baaf54) - Fix remaining print format warnings (3b80181) Updated - docs(modem): Fix esp_modem_at_raw() description (C-API) (492a6a0) - ci(common): updated github actions(checkout, upload, download) v3 to 4, Ubuntu 20.04 to v22.04 (a23a002)

diplfranzhoepfinger · 2024-11-17T12:21:18Z

Hello @david-cermak
i do not find the C-API URC Handler for ESP-Modem in Version 1.2.0
did you forget to add it ?

Thanks,
Franz

diplfranzhoepfinger · 2024-11-17T12:23:09Z

@david-cermak

also next, we need to implement a URC Parser.
so that we can react on the received URCs.

Thanks,
Franz

david-cermak · 2024-11-18T15:36:45Z

i do not find the C-API URC Handler for ESP-Modem in Version 1.2.0
did you forget to add it ?

I did forget, sorry. Reopening -- will create v1.2.1 this week.

david-cermak · 2024-11-18T15:40:46Z

@diplfranzhoepfinger Franz, since you're a regular user and also a contributor to esp-modem I'd like to ask you to check this PR: #685
Did you or your team have any problem using IDE navigation and auto code expansion with the defined AT commands?

1.2.1 Bug Fixes - Use higher GPIO range to support new chips (428fdbb, espressif#558) - Remove tests and support for IDFv4.4, added IDFv5.4 (433a033) - Fix typo GENETIC -> GENERIC in mode types (090b1ff, espressif#667) - Add support for URC handler into C-API (295d99d, espressif#180)

skibz · 2024-11-20T15:52:17Z

This is an epic addition to the C API and is going to drastically simplify several systems I'm maintaining. Thank you @david-cermak ! 🙏 🎉

espressif-bot added the Status: Opened label Nov 24, 2022

github-actions bot changed the title ~~Implement URC Handling.~~ Implement URC Handling. (IDFGH-8812) Nov 24, 2022

espressif-bot added the Awaiting Response label Mar 24, 2023

david-cermak added this to the modem-v1.2.0 milestone Nov 28, 2023

david-cermak added a commit to david-cermak/esp-protocols that referenced this issue Jul 24, 2024

feat(modem): Add support for handling URC

090294b

Closes espressif#180

david-cermak mentioned this issue Jul 24, 2024

[modem]: Add support for handling URC #620

Merged

1 task

david-cermak added a commit to david-cermak/esp-protocols that referenced this issue Sep 16, 2024

feat(modem): Add support for handling URC

1b6a3b3

Closes espressif#180

david-cermak closed this as completed in #620 Sep 17, 2024

embedcat pushed a commit to embedcat/esp-protocols that referenced this issue Sep 17, 2024

feat(modem): Add support for handling URC

76a9e4e

Closes espressif#180

espressif-bot added Status: Done Resolution: Done labels Sep 30, 2024

david-cermak mentioned this issue Nov 7, 2024

[modem]: bump: 1.1.0 -> 1.2.0 #688

Merged

david-cermak reopened this Nov 18, 2024

david-cermak mentioned this issue Nov 20, 2024

[modem]: Support for URC handler in C-API -> v1.2.1 #698

Merged

david-cermak closed this as completed in 295d99d Nov 20, 2024

Implement URC Handling. (IDFGH-8812) #180

Implement URC Handling. (IDFGH-8812) #180

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franz-ms-muc commented Dec 1, 2022 via email •

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franz-ms-muc commented Dec 13, 2022 •

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