# Response Time in GSM modem RC7620 for Some of AT commands **URL:** \ **Category:** Uncategorized\ **Created:** [September 22, 2025, 7:00am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512 "2025-09-22T07:00:08Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 22, 2025, 7:00am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/1 "2025-09-22T07:00:08Z")
For some of AT commands what is response time need to wait ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 22, 2025, 7:01am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/2 "2025-09-22T07:01:08Z")
commands like AT,AT+CSQ?,AT\_+CREG,AT+CGATT ect ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 22, 2025, 7:07am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/3 "2025-09-22T07:07:03Z")
please see RC76xx AT command user guide- Section “A.3 Command Timeout and Other Information”: [https://source.sierrawireless.com/resources/airprime/software/rc76xx-at-command-reference-guide/#sthash.HIcRE0bm.dpbs](https://source.sierrawireless.com/resources/airprime/software/rc76xx-at-command-reference-guide/#sthash.HIcRE0bm.dpbs) ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 22, 2025, 9:20am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/4 "2025-09-22T09:20:18Z")
Thank you for Refering this section,with this i have query of for sending just at command ,i have to wait 2 second to get response as OK from gsm modem ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 22, 2025, 9:28am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/5 "2025-09-22T09:28:19Z")
this is just the maximum value for timeout ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 22, 2025, 9:29am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/6 "2025-09-22T09:29:33Z")
okay with minimum time how fast i can get response for AT command ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 22, 2025, 9:47am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/7 "2025-09-22T09:47:28Z")
I just tried in UART: ```auto [2025-09-22 17:46:54.320] at [2025-09-22 17:46:54.603] OK [2025-09-22 17:46:55.449] ati3 [2025-09-22 17:46:55.877] Manufacturer: Sierra Wireless, Incorporated [2025-09-22 17:46:55.877] Model: RC7620-1 [2025-09-22 17:46:55.877] Revision: SWI9X07H_00.09.10.00 85890e jenkins 2023/09/25 03:16:56 [2025-09-22 17:46:55.893] IMEI: 353635110212345 [2025-09-22 17:46:55.893] IMEI SV: 29 [2025-09-22 17:46:55.893] FSN: 7T118701512345 [2025-09-22 17:46:55.893] +GCAP: +CGSM [2025-09-22 17:46:55.893] [2025-09-22 17:46:55.893] OK ``` ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 22, 2025, 11:35am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/8 "2025-09-22T11:35:40Z")
from above reference its taking around 300 ms for getting response for AT command ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 24, 2025, 4:19am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/9 "2025-09-24T04:19:48Z")
is ther any possibility to get at command response in micro second ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 24, 2025, 4:22am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/10 "2025-09-24T04:22:25Z")
if you use USB AT port, the response will be faster: ```auto [2025-09-24 12:21:31.934] at [2025-09-24 12:21:32.066] OK [2025-09-24 12:21:32.887] ati3 [2025-09-24 12:21:32.890] Manufacturer: Sierra Wireless, Incorporated [2025-09-24 12:21:32.890] Model: RC7620-1 [2025-09-24 12:21:32.890] Revision: SWI9X07H_00.09.10.00 85890e jenkins 2023/09/25 03:16:56 [2025-09-24 12:21:32.890] IMEI: 353635110212435 [2025-09-24 12:21:32.890] IMEI SV: 29 [2025-09-24 12:21:32.890] FSN: 7T118701512345 [2025-09-24 12:21:32.890] +GCAP: +CGSM [2025-09-24 12:21:32.890] [2025-09-24 12:21:32.890] OK ``` ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 24, 2025, 4:37am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/11 "2025-09-24T04:37:43Z")
for USB port also its taking around 130 ms ,is it any way to read response in micro second ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 24, 2025, 4:40am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/12 "2025-09-24T04:40:37Z")
did you do any test on your side with USB port? Tried again with tera term with USB port by directly pasting AT commands instead of typing manually: ```auto [2025-09-24 12:39:39.962] AT [2025-09-24 12:39:39.962] OK [2025-09-24 12:39:40.780] at [2025-09-24 12:39:40.780] OK [2025-09-24 12:39:41.585] at [2025-09-24 12:39:41.585] OK [2025-09-24 12:39:42.398] at [2025-09-24 12:39:42.398] OK [2025-09-24 12:39:43.214] at [2025-09-24 12:39:43.214] OK ``` ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 24, 2025, 4:49am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/13 "2025-09-24T04:49:18Z")
Basically we are interface ths GSM modem with microcontroller through UART.in this interface i am unable to receive response in micro second ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 24, 2025, 4:55am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/14 "2025-09-24T04:55:34Z")
tried again on UART with tera term by directly pasting AT commands instead of typing manually ```auto [2025-09-24 12:54:43.413] AT [2025-09-24 12:54:43.413] OK [2025-09-24 12:54:44.245] at [2025-09-24 12:54:44.245] OK [2025-09-24 12:54:45.028] at [2025-09-24 12:54:45.045] OK [2025-09-24 12:54:45.845] at [2025-09-24 12:54:45.845] OK [2025-09-24 12:54:46.661] at [2025-09-24 12:54:46.661] OK ``` ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 25, 2025, 4:01am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/15 "2025-09-25T04:01:38Z")
BTW, you might also need to increase UART baud rate (e.g. 921600) by AT+IPR command and see if there is any improvement. ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 25, 2025, 4:09am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/16 "2025-09-25T04:09:08Z")
> [@jyijyi](#): > > AT+IPR this command was unable to find in data sheet ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 25, 2025, 4:10am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/17 "2025-09-25T04:10:14Z")
can u please refer datasheet for RC7620 gsm modem with all command included ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 25, 2025, 4:24am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/18 "2025-09-25T04:24:24Z")
AT+IPR is a standard command from 3GPP specification: [https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1515](https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1515) RC76 AT command user guide will not include all the standard command usage, but you can have a look here: [https://m2msupport.net/m2msupport/general-at-commands/](https://m2msupport.net/m2msupport/general-at-commands/) ---
**Author:** ![santosh.naik](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@santosh.naik](https://forum.sierrawireless.com/u/santosh.naik)\ **Post date:** [September 25, 2025, 4:34am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/19 "2025-09-25T04:34:24Z")
okay Thank you. currently I’m using UDP packet transfer protocol. which are the essential command i need to check every time before sending data to server. currently i am using AT+CSQ to check signal strength AT+CREG? to check network registered to home or its roaming AT+CGATT? for modem status attached with gprs for me these commands taking near 1 second ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 25, 2025, 4:44am UTC](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512/20 "2025-09-25T04:44:52Z")
here is my testing in UART: ```auto [2025-09-25 12:43:04.046] AT+CSQ [2025-09-25 12:43:04.046] +CSQ: 26,99 [2025-09-25 12:43:04.046] [2025-09-25 12:43:04.046] OK [2025-09-25 12:43:04.864] AT+CREG? [2025-09-25 12:43:04.864] +CREG: 2,1,"FFFE","16E8A17",7 [2025-09-25 12:43:04.864] [2025-09-25 12:43:04.864] OK [2025-09-25 12:43:05.663] AT+CGATT? [2025-09-25 12:43:05.663] +CGATT: 1 [2025-09-25 12:43:05.663] [2025-09-25 12:43:05.663] OK [2025-09-25 12:44:17.307] at+CSQ;+CREG?;+CGATT? [2025-09-25 12:44:18.044] +CSQ: 24,99 [2025-09-25 12:44:18.044] [2025-09-25 12:44:18.044] +CREG: 2,1,"FFFE","16E8A17",7 [2025-09-25 12:44:18.044] [2025-09-25 12:44:18.044] +CGATT: 1 [2025-09-25 12:44:18.044] [2025-09-25 12:44:18.044] OK ``` [Next page](https://forum.sierrawireless.com/t/response-time-in-gsm-modem-rc7620-for-some-of-at-commands/35512.md?page=2)