• BG95/BG96
• EG21-G
• EG25-G

Firmware updates for Quectel cellular modules are typically available through Quectel support. Please reach out to your Quectel representative or Quectel Support for assistance with firmware updates.

Please refer to the main Knowlegdebase page for modem-independent configuration tips.

Initialization

If you are connecting via LTE, only configure the modem's Radio Access Technology (RAT) preference to Cat-M1: issue the Quectel-specific command AT+QCFG="iotopmode" with its default setting, 0, the first numeric parameter of the command below.

AT+QCFG="iotopmode",0,1

If you wish to limit comms to LTE only, i.e., disable 2G (GSM), issue:

AT+QCFG="nwscanmode",3,1

The first numeric parameter, 3, indicates LTE only; a value of 1 sets the modem to GSM only. The default, 0, tells the modem to select the RAT automatically. The setting is applied immediately.

Data-centric attach mode

To set the modem to force data-centric attachment — ie., do not make circuit-switched attachments — issue AT+QCFG="servicedomain",1,1.

The first numeric parameter is the mode:

• 1 = Packet Switch (PS) attach only.
• 2 = Circuit Switch and Packet Switch (CS/PS) attach.

This setting is non-volatile.

Configure the URC UART

To configure the Unsolicited Result Code (URC) serial (UART) delivery channel to uart1, issue AT+QURCCFG="urcport","uart1".

Perform a ping

To perform a ping to a remote host, issue AT+QPING=1,"<TARGET_IP_ADDRESS_OR_NAME>". This will yield, for example:

1
+QPING: 0,"8.8.8.8",32,93,255
2
+QPING: 0,"8.8.8.8",32,78,255
3
+QPING: 0,"8.8.8.8",32,80,255
4
+QPING: 0,"8.8.8.8",32,80,255
5
+QPING: 0,4,4,0,78,93,82

Perform an HTTP GET

To issue an HTTP GET request using the built-in HTTP client, run the following commands:

1. Set the PDP context ID: AT+QHTTPCFG="contextid",1
2. Enable output of HTTP response headers: AT+QHTTPCFG="responseheader",1
3. Activate the PDP context: AT+QIACT=1
4. Set the target URL: AT+QHTTPURL=21This sets the modem to receive, prompted by the output CONNECT. The first parameter is the number of bytes the modem should expect to receive: it will end input after receiving this number of characters. The value of 21 comes from the URL below. The URL you provide must include the protocol, ie. http://.
5. Upon CONNECT, enter the URL. For example: http://ifconfig.co/ip
6. Issue a GET request: AT+QHTTPGET
7. View the request: AT+QHTTPREAD

The request will look like this:

1
HTTP/1.1 200 OK
2
Date: Sat, 28 Nov 2020 18:38:52 GMT
3
Content-Type: text/plain; charset=utf-8
4
Content-Length: 15
5
Connection: keep-alive
6
Set-Cookie: __cfduid=d33c30006be23245591d83133631425031606588732; expires=Mon, 28-Dec-20 18:38:52 GMT; path=/; domain=.ifconfig.co; HttpOnly; SameSite=Lax
7
Strict-Transport-Security: max-age=15768000; includeSubdomains; preload
8
CF-Cache-Status: DYNAMIC
9
cf-request-id: 06b1bfaa91000025ed8fa46000000001
10
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report?s=8eYWG5vobibOeI8xWFxNSGJpELSCSthW9aAclBXw3esKOGBsYPT4izdckGI2kpOW%2BA7KOhi3OFk%2FLUab3RpQvKu5EYYWLD%2B2fSxV4Q%3D%3D"}],"group":"cf-nel","max_age":604800}
11
NEL: {"report_to":"cf-nel","max_age":604800}
12
Server: cloudflare
13
CF-RAY: 5f96355748c225ed-IAD
14

15
99.84.181.20
16

17
OK
18
+QHTTPREAD: 0

Perform an HTTPS GET

To issue an HTTPS GET request using the built-in HTTP client, follow the same procedure outlined above but with extra steps to configure SSL.

1. Set the PDP context ID: AT+QHTTPCFG="contextid",1
2. Enable output of HTTP response headers: AT+QHTTPCFG="responseheader",1
3. Activate the PDP context if it is not already active: AT+QIACT=1
4. Select the SSL context ID for this PDP context ID: AT+QHTTPCFG="sslctxid",1
5. Set the SSL version. Choose TLS 1.2: AT+QSSLCFG="sslversion",1,3
6. Set the SSL cipher suite. Choose all types: AT+QSSLCFG="ciphersuite",1,0xFFFF
7. For testing, set the SSL verification level to 0, i.e., no CA certificate is required: AT+QSSLCFG="seclevel"=0
8. Set the target URL: AT+QHTTPURL=70This sets the modem to receive, prompted by the output CONNECT. The parameter is the number of bytes the modem should expect to receive: it will end input after receiving this number of characters. The value of 70 comes from the URL below. The URL you provide must include the protocol, ie. https://.
9. Upon receiving CONNECT, enter the URL. For example: https://twilio-cms-prod.s3.amazonaws.com/documents/super-sim-test.json
10. Issue a GET request: AT+QHTTPGET
11. View the response: AT+QHTTPREAD

The request will look something like this:

1
HTTP/1.1 200 OK
2
Date: Thu, 19 May 2022 10:23:25 GMT
3
Last-Modified: Thu, 19 May 2022 10:05:25 GMT
4
Accept-Ranges: bytes
5
Content-Type: application/json
6
Server: AmazonS3
7
Content-Length: 128
8

9
{
10
   "userId": 1,
11
   "id": 5,
12
   "title": "laboriosam mollitia et enim quasi adipisci quia provident illum",
13
   "completed": false                                                                                                                         }
14
OK
15

16
+QHTTPREAD: 0

Perform an HTTP(S) POST

Sending data from the modem to an Internet-hosted API follows the paths outlined above for the HTTP and HTTPS protocols: call AT+QHTTPOST instead of AT+QHTTPGET.

Optionally, the QHTTPOST command takes a parameter indicating the amount of data you are sending. The modem uses this to read that number of bytes via the UART over which your application is communicating with it. If you are providing a custom HTTP request header, remember to include its length too.

Low-power modes

While the BG95 and 96 support low-power modes for eDRX and PSM, support for these features will vary by visited network and location. The commands to enable for each of these are:

1
AT+CEDRXS=1
2
AT+CPSMS=1

See also AT+QPTWEDRXS and AT+CEDRXRDP in the BG95/96 AT Commands Manual for further options.

Using these features, but especially PSM, can make the modem inaccessible to the terminal during its sleep time. It's best to experiment with these features locally. To disable all power saving, send:

1
AT+CEDRXS=0
2
AT+CPSMS=0

You can learn more about implementing these modes in our low-power usage documentation.

Known issues

The BG95 and BG96 will connect to 2G if they are unable to connect to Cat-M1 and 2G has not been disabled. Unfortunately, if Cat-M1 coverage is restored, or the device moves into an area where Cat-M1 is available, the modem will nonetheless continue to connect to 2G. This is because Quectel modems favor the most recently used RAT when they reconnect, and this value is persisted in non-volatile memory.

To avoid this issue, you can use the following AT command in your application to clear the stored RAT by resetting the modem's RAT searching sequence:

AT+QCFG="nwscanseq",020103,1

The parameter 020103 represents the RAT sequence: 02 is Cat-M1, 01 is GSM, and 03 is NB-IoT. Super SIM is not compatible with NB-IoT, so this is placed last.

The final 1 forces the sequence to be applied immediately, avoiding the need to reboot the modem. Leave this parameter off, or set it to 0, to impose the new sequence on the next power cycle.

Additional resources

• BG96 AT Commands Manual Quectel sign-in required • BG95, BG77, and BG600L Series AT Commands Manual Quectel sign-in required

Initialization

If you wish to limit communications to LTE only, i.e., to disable 2G (GSM), issue this command:

AT+QCFG="nwscanmode",3

This setting will be applied immediately.

Data-centric attach mode

To instruct the modem to initiate data-centric attachments only — ie., not to make voice-oriented circuit-switched attachments too, which is the default — issue:

AT+QCFG="servicedomain",1

This setting will be applied immediately.

Configure the URC UART

To configure the Unsolicited Result Code (URC) serial (UART) delivery channel to uart1, issue AT+QURCCFG="urcport","uart1".

Perform a ping

To perform a ping to a remote host, issue AT+QPING=1,"<TARGET_IP_ADDRESS_OR_NAME>". This will yield, for example:

1
+QPING: 0,"8.8.8.8",32,172,255
2
+QPING: 0,"8.8.8.8",32,212,255
3
+QPING: 0,"8.8.8.8",32,376,255
4
+QPING: 0,"8.8.8.8",32,174,255
5
+QPING: 0,4,4,0,172,376,233

Perform an HTTP GET

To issue an HTTP GET request using the built-in HTTP client, run the following commands:

1. Set the PDP context ID: AT+QHTTPCFG="contextid",1
2. Enable output of HTTP response headers: AT+QHTTPCFG="responseheader",1
3. Activate the PDP context: AT+QIACT=1
4. Set the target URL: AT+QHTTPURL=21This sets the modem to receive, prompted by the output CONNECT. The first parameter is the number of bytes the modem should expect to receive: it will end input after receiving this number of characters. The URL you provide must include the protocol, ie. http://.
5. Upon CONNECT, enter the URL. For example: http://ifconfig.co/ip
6. Issue a GET request: AT+QHTTPGET
7. View the request: AT+QHTTPREAD

The request will look like this:

1
HTTP/1.1 200 OK
2
Date: Sat, 28 Nov 2020 18:38:52 GMT
3
Content-Type: text/plain; charset=utf-8
4
Content-Length: 15
5
Connection: keep-alive
6
Set-Cookie: __cfduid=d33c30006be23245591d83133631425031606588732; expires=Mon, 28-Dec-20 18:38:52 GMT; path=/; domain=.ifconfig.co; HttpOnly; SameSite=Lax
7
Strict-Transport-Security: max-age=15768000; includeSubdomains; preload
8
CF-Cache-Status: DYNAMIC
9
cf-request-id: 06b1bfaa91000025ed8fa46000000001
10
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report?s=8eYWG5vobibOeI8xWFxNSGJpELSCSthW9aAclBXw3esKOGBsYPT4izdckGI2kpOW%2BA7KOhi3OFk%2FLUab3RpQvKu5EYYWLD%2B2fSxV4Q%3D%3D"}],"group":"cf-nel","max_age":604800}
11
NEL: {"report_to":"cf-nel","max_age":604800}
12
Server: cloudflare
13
CF-RAY: 5f96355748c225ed-IAD
14

15
99.84.181.20
16

17
OK
18
+QHTTPREAD: 0

Perform an HTTPS GET

To issue an HTTPS GET request using the built-in HTTP client, follow the same procedure outlined above but with extra steps to configure SSL.

1. Set the PDP context ID: AT+QHTTPCFG="contextid",1
2. Enable output of HTTP response headers: AT+QHTTPCFG="responseheader",1
3. Activate the PDP context if it is not already active: AT+QIACT=1
4. Select the SSL context ID for this PDP context ID: AT+QHTTPCFG="sslctxid",1
5. Set the SSL version. Choose TLS 1.2: AT+QSSLCFG="sslversion",1,3
6. Set the SSL cipher suite. Choose all types: AT+QSSLCFG="ciphersuite",1,0xFFFF
7. For testing, set the SSL verification level to 0, i.e., no CA certificate is required: AT+QSSLCFG="seclevel"=0
8. Set the target URL: AT+QHTTPURL=70This sets the modem to receive, prompted by the output CONNECT. The parameter is the number of bytes the modem should expect to receive: it will end input after receiving this number of characters. The value of 70 comes from the URL below. The URL you provide must include the protocol, ie. https://.
9. Upon receiving CONNECT, enter the URL. For example: https://twilio-cms-prod.s3.amazonaws.com/documents/super-sim-test.json
10. Issue a GET request: AT+QHTTPGET
11. View the response: AT+QHTTPREAD

The request will look something like this:

1
HTTP/1.1 200 OK
2
Date: Thu, 19 May 2022 10:23:25 GMT
3
Last-Modified: Thu, 19 May 2022 10:05:25 GMT
4
Accept-Ranges: bytes
5
Content-Type: application/json
6
Server: AmazonS3
7
Content-Length: 128
8

9
{
10
   "userId": 1,
11
   "id": 5,
12
   "title": "laboriosam mollitia et enim quasi adipisci quia provident illum",
13
   "completed": false                                                                                                                         }
14
OK
15

16
+QHTTPREAD: 0

Perform an HTTP(S) POST

Sending data from the modem to an Internet-hosted API follows the paths outlined above for the HTTP and HTTPS protocols: call AT+QHTTPOST instead of AT+QHTTPGET.

Optionally, the QHTTPOST command takes a parameter indicating the amount of data you are sending. The modem uses this to read that number of bytes via the UART over which your application is communicating with it. If you are providing a custom HTTP request header, remember to include its length too.

Low-power modes

The EG21-G does not support eDRX and PSM.

Additional resources

• EG21-G AT Commands Manual Quectel sign-in required

Initialization

If you wish to limit communications to LTE only, i.e., to disable 2G (GSM), issue this command:

AT+QCFG="nwscanmode",3

This setting will be applied immediately.

Data-centric attach mode

To instruct the modem to initiate data-centric attachments only — ie., not to make voice-oriented circuit-switched attachments too, which is the default — issue:

AT+QCFG="servicedomain",1

This setting will be applied immediately.

Configure the URC UART

To configure the Unsolicited Result Code (URC) serial (UART) delivery channel to uart1, issue AT+QURCCFG="urcport","uart1".

Perform a ping

To perform a ping to a remote host, issue AT+QPING=1,"<TARGET_IP_ADDRESS_OR_NAME>". This will yield, for example:

1
+QPING: 0,"8.8.8.8",32,167,255
2
+QPING: 0,"8.8.8.8",32,162,255
3
+QPING: 0,"8.8.8.8",32,164,255
4
+QPING: 0,"8.8.8.8",32,162,255
5
+QPING: 0,4,4,0,162,167,163

Perform an HTTP GET

To issue an HTTP GET request using the built-in HTTP client, run the following commands:

1. Set the PDP context ID: AT+QHTTPCFG="contextid",1
2. Enable output of HTTP response headers: AT+QHTTPCFG="responseheader",1
3. Activate the PDP context: AT+QIACT=1
4. Set the target URL: AT+QHTTPURL=21This sets the modem to receive, prompted by the output CONNECT. The first parameter is the number of bytes the modem should expect to receive: it will end input after receiving this number of characters. The URL you provide must include the protocol, ie. http://.
5. Upon CONNECT, enter the URL. For example: http://ifconfig.co/ip
6. Issue a GET request: AT+QHTTPGET
7. View the request: AT+QHTTPREAD

The request will look like this:

1
HTTP/1.1 200 OK
2
Date: Fri, 20 May 2022 08:52:56 GMT
3
Content-Type: text/plain; charset=utf-8
4
Content-Length: 13
5
Connection: keep-alive
6
CF-Cache-Status: DYNAMIC
7
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=9fl%2B3t%2FRMhY2tMyWQDFAIM1mfFem0zLc7aONeXJ%2Fg4a%2FJPKFl%2BeGYElL5zwwuxi7%2BIfqx}
8
NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
9
Server: cloudflare
10
CF-RAY: 70e3d6ceb8cc5b17-IAD
11
alt-svc: h3=":443"; ma=86400, h3-29=":443"; ma=86400
12

13
44.204.32.40
14

15
OK
16

17
+QHTTPREAD: 0

Perform an HTTPS GET

To issue an HTTPS GET request using the built-in HTTP client, follow the same procedure outlined above but with extra steps to configure SSL.

1. Set the PDP context ID: AT+QHTTPCFG="contextid",1
2. Enable output of HTTP response headers: AT+QHTTPCFG="responseheader",1
3. Activate the PDP context if it is not already active: AT+QIACT=1
4. Select the SSL context ID for this PDP context ID: AT+QHTTPCFG="sslctxid",1
5. Set the SSL version. Choose TLS 1.2: AT+QSSLCFG="sslversion",1,3
6. Set the SSL cipher suite. Choose all types: AT+QSSLCFG="ciphersuite",1,0xFFFF
7. For testing, set the SSL verification level to 0, i.e., no CA certificate is required: AT+QSSLCFG="seclevel"=0
8. Set the target URL: AT+QHTTPURL=70This sets the modem to receive, prompted by the output CONNECT. The parameter is the number of bytes the modem should expect to receive: it will end input after receiving this number of characters. The value of 70 comes from the URL below. The URL you provide must include the protocol, ie. https://.
9. Upon receiving CONNECT, enter the URL. For example: https://twilio-cms-prod.s3.amazonaws.com/documents/super-sim-test.json
10. Issue a GET request: AT+QHTTPGET
11. View the response: AT+QHTTPREAD

The request will look something like this:

1
HTTP/1.1 200 OK
2
Date: Thu, 19 May 2022 10:23:25 GMT
3
Last-Modified: Thu, 19 May 2022 10:05:25 GMT
4
Accept-Ranges: bytes
5
Content-Type: application/json
6
Server: AmazonS3
7
Content-Length: 128
8

9
{
10
   "userId": 1,
11
   "id": 5,
12
   "title": "laboriosam mollitia et enim quasi adipisci quia provident illum",
13
   "completed": false                                                                                                                         }
14
OK
15

16
+QHTTPREAD: 0

Perform an HTTP(S) POST

Sending data from the modem to an Internet-hosted API follows the paths outlined above for the HTTP and HTTPS protocols: call AT+QHTTPOST instead of AT+QHTTPGET.

Optionally, the QHTTPOST command takes a parameter indicating the amount of data you are sending. The modem uses this to read that number of bytes via the UART over which your application is communicating with it. If you are providing a custom HTTP request header, remember to include its length too.

Low-power modes

While the EG21-G supports low-power modes for eDRX and PSM, support for these features will vary by visited network and location. The commands to enable for each of these are:

1
AT+CEDRXS=1
2
AT+CPSMS=1

Using these features, but especially PSM, can make the modem inaccessible to the terminal during its sleep time. It's best to experiment with these features locally. To disable all power saving, send:

1
AT+CEDRXS=0
2
AT+CPSMS=0

You can learn more about implementing these modes in our low-power usage documentation.

Additional resources

• EG25-G AT Commands Manual Quectel sign-in required