AirPrime and HL7548 AT Commands Interface Guide Rev10 0

Table Of Contents
4116303 Rev 10.0 August 10, 2017 302
AT Commands Interface Guide
Appendix
16.9. Switch Data/Command Mode DTR +++ ATO
Behavior Table
When the module is in data mode and the connection encounters an error, NO CARRIER terminal
response is shown and the module is switched back to command mode.
The following table shows the behavior when trying to switch mode (when connection is running
properly):
Case 1: "+++" is used to switch from data mode to command mode, and the service is
suspended.
Case 2: If AT&D1 is set, "DTR drop" is used to switch from data mode to command mode, but the
service is suspended.
Case 3: If AT&D2 is set, "DTR drop" is used to switch from data mode to command mode, and
the service is stopped.
Case 4: If AT&D0 is set, "DTR drop" has no any impact on the mode switch.
Case 5: ATO[n] is used to switch from command mode to data mode.
Case1/Case5
+++/ATO[n]
Case2/Case5
DTR1/ATO[n]
Case3/Case5
DTR2/ATO[n]
Case4/Case5
DTR0
TCP/UDP:
+KTCPSND: Send data
+KTCPRCV: Receive data
+KUDPSND: Send data
+KUDPRCV: Receive data
+KTCPSTART: Direct data flow
OK/CONNECT
OK/CONNECT
NO CARRIER/
NO CARRIER
(disconnect)
NO IMPACT
FTP:
+KFTPRCV: Download FTP files
+KFTPSND: Upload FTP files
OK/
NO CARRIER
(disconnect)
OK/
NO CARRIER
(disconnect)
NO CARRIER/
NO CARRIER
(disconnect)
NO IMPACT
HTTP:
+KHTTPGET: Get information
+KHTTPHEAD: Get head of
information
+KHTTPPOST: Send data
+KHTTPHEADER: Set the HTTP
Request Header
OK/
NO CARRIER
(disconnect)
OK/
NO CARRIER
(disconnect)
NO CARRIER/
NO CARRIER
(disconnect)
NO IMPACT
HTTPS:
+KHTTPSGET: Get information
+KHTTPSHEAD: Get head of
information
+KHTTPSPOST: Send data
+KHTTPSHEADER: Set the HTTPS
Request Header
OK/
NO CARRIER
(disconnect)
OK/
NO CARRIER
(disconnect)
NO CARRIER/
NO CARRIER
(disconnect)
NO IMPACT
SSL:
+KCERTSTORE: Store root CA
+KPRIVKSTORE: Store private key
OK/
NO CARRIER
(abort)
OK/
NO CARRIER
(abort)
NO CARRIER/
NO CARRIER
(abort)
NO IMPACT