4G_2G DTU Products Function
- 47 -
◼
Parameter:
◆
url: Upgrade url address.
Ex:
AT+GOTA=http://download.iotworkshop.com/iotbridge/firmwares/4GLTE/4G_V1.575_7ed2afca1cf4919f40346f3f23403594.bin
There is upgrade status information.
2.4.2.39.
AT+GETIP
◼
Function: Query the IP address of the specified domain name.
◼
Format:
◆
Query Operation
AT+GETIP<CR>
+ok=<
”domain_name”
><CR><LF><CR><LF>
◼
Parameter:
◆
“domain_name”
: The domain name that needs to be queried for the IP address.
2.4.2.40.
AT+PING
◼
Function: Query Whether the Address is Reachable.
◼
Format:
◆
Query Operation:
AT+PING=<IP><CR>
+ok=<value><CR><LF><CR><LF>
◼
Parameter:
◆
iP: IP address or domain name.
◆
value: Success or failure
⚫
success: Success.
⚫
fail: Failure.
2.4.2.41.
AT+GSLQ
◼
Function: Query GPRS Signal Strength.
◼
Format:
◆
Query Operation:
AT+GSLQ<CR>
+ok=<status,ret><CR><LF><CR><LF>
◼
Parameter:
◆
state: Signal strength description, including:
⚫
0: Disconnect.
⚫
1: Connect.
◆
ret: Signal strength value, the range is 0-31.
2.4.2.42.
AT+GSMST
◼
Function: Query GSM status.
◼
Format: