Test command
| Command | Response | Parameter |
|---|---|---|
| AT | OK | – |
Reset
| Command | Response | Parameter |
|---|---|---|
| AT+RST | OK | – |
Get firmware version
| Command | Response | Parameter |
|---|---|---|
| AT+GMR | VERSION:<Param>
OK |
Param : firmware version |
WiFi mode
| Command | Response | Parameter |
|---|---|---|
| AT+CWMODE=? | +CWMODE:(1-3)
OK |
– |
| AT+CWMODE? | +CWMODE: <Param>
OK |
Param:
1 — station mode (client) 2 — AP mode (host) 3 — AP+station mode |
| AT+CWMODE=<Param> | OK | Same as above |
List APs
| Command | Response | Parameter |
|---|---|---|
| AT+CWLAP | AT+CWLAP: <Param1>,<Param2>,<Param3>,<Param4>,<Param5>
OK |
Param1 — auth (authentication)
0 — OPEN 1 — WEP 2 — WPA_PSK 3 — WPA2_PSK 4 — WPA_WPA2_PSK Param2 — ssid Param3 — rssi (signal strength) Param4 — mac (MAC address) |
| AT+CWLAP=<Param1>,<Param2>,<Param3> | AT+CWLAP: <Param1>,<Param2>,<Param3>,<Param4>,<Param5>
OK |
Same as above |
Example Response:
+CWLAP:(3,”this_is_my_wifi”,-65,”40-8D-5C-E8-EB-49”,11)
Connect to AP
| Command | Response | Parameter |
|---|---|---|
| AT+CWJAP? | +CWJAP: <Param1>
OK |
Param1 — ssid
Param2 — password |
| AT+CWJAP=<Param1>,<Param2> | OK | Same as above |
Example:
AT+CWJAP=”this_is_my_wifi”,”1234”
Disconnect from AP
| Command | Response | Parameter |
|---|---|---|
| AT+CWQAP | OK | – |
Enable Multiple Connections
| Command | Response | Parameter |
|---|---|---|
| AT+CIPMUX=<Param> | OK | Param — mode
0 — single connection 1 — multiple connection (up to 4) |
| AT+CIPMUX? | +CIFSR:<Param>
OK |
Same as above |
Configure SoftAP
| Command | Response | Parameter |
|---|---|---|
| AT+CWSAP? | +CWSAP: <Param1>, <Param2>, <Param3>,<Param4>
OK |
Param1 — ssid
Param2 — password Param3– channel Param4 — auth 0 — OPEN 2 — WPA_PSK 3 — WPA2_PSK 4 — WPA_WPA2_PSK |
| AT+CWSAP=<Param1>,<Param2>, <Param3>, <Param4> | OK | Same as above |
Example:
AT+CWSAP=”this_is_my_wifi”,”1234”,11,3
Show Clients Connected to SoftAP
| Command | Response | Parameter |
|---|---|---|
| AT+CWLIF | [<Param1>, <Param2>]
OK |
Param1 — IP address
Param2 — mac address (32-bit for ESP-01, 8-bit for ESP-12) |
Example Response:
AT+CWLIF 192.168.1.5, 3fff5040:3fff508D:3fff505C:3fff50E8:3fff50EB:3fff5049
Set IP Address in SoftAP Mode
| Command | Response | Parameter |
|---|---|---|
| AT+CIPAP? | +CIPAP?: <Param1>
+CIPAP?: <Param2> +CIPAP?: <Param3> OK |
Param1 — IP address
Optional: Param2 — gateway address Param3 — netmask address |
| AT+CIPAP=<Param1>,[<Param2>,<Param3>] | OK | Same as above |
Example:
AT+CIPAP=”192.168.1.5”,”192.168.1.1”,”255.255.255.0”
Set IP Address in Station Mode
| Command | Response | Parameter |
|---|---|---|
| AT+CIPSTA? | +CIPSTA?: <Param1>
+CIPSTA?: <Param2> +CIPSTA?: <Param3> OK |
Param1 — IP address
Optional: Param2 — gateway address Param3 — netmask address |
| AT+CIPSTA=<Param1>,[<Param2>,<Param3>] | OK | Same as above |
Example:
AT+CIPSTA=”192.168.1.3”,”192.168.1.1”,”255.255.255.0”
Set MAC Address in Station Mode
| Command | Response | Parameter |
|---|---|---|
| AT+CIPSTAMAC? | +CIPSTAMAC?: <Param>
OK |
Param — mac address |
| AT+CIPSTAMAC=<Param> | OK | Same as above |
Example:
AT+CIPSTAMAC=”40-8C-5C-E8-EA-48”
Notes:
- When setting the MAC address of the ESP8266, make sure that LSB (bit 0) of each byte is not 1 (see example MAC address above)
- The SoftAP MAC address must be different from the Station Mode MAC address
Set MAC Address in SoftAP Mode
| Command | Response | Parameter |
|---|---|---|
| AT+CIPAPMAC? | +CIPSTAMAC?: <Param>
OK |
Param — mac address |
| AT+CIPAPMAC=<Param> | OK | Same as above |
Example:
AT+CIPAPMAC=”40-8C-5C-E8-EA-48”
See same notes on previous command
Get Connection Status
| Command | Response | Parameter |
|---|---|---|
| AT+CIPSTATUS | STATUS: <Param1>
+CIPSTATUS: <Param2>, <Param3>, <Param4>, <Param5>, <Param6> OK |
Param1 — status
2 — Has IP 3 — Connected 4 — Not Connected Param2 — id (0 to 4) Param3 — type (“TCP” or “UDP”) Param4 — IP address Param5 — port number Param6 — tetype 0 — running as client 1 — running as server |
| AT+CIPSTATUS=? | OK | – |
Start Connection
| Command | Response | Parameter |
|---|---|---|
| Single TCP Connection (AT+CIPMUX=0):
AT+CIPSTART=<Param1>,<Param2>,<Param3>,[<Param4>] |
OK
or ERROR or Already Connected |
Param1 — type (“TCP or UDP”)
Param2 — IP address Param3 — port number Optional: Param4 — TCP keep alive 0 — disable TCP keep alive 1 — 1-7200 seconds detection time interval |
| Multiple TCP Connection (AT+CIPMUX=1):
AT+CIPSTART=<Param1>,<Param2>,<Param3>,<Param4>,[<Param5>] |
OK
or ERROR or Already Connected |
Param1 — link ID (0 to 4)
Param2 — type (“TCP or UDP”) Param3 — IP address Param4 — port number Optional: Param5 — TCP keep alive 0 — disable TCP keep alive 1 -7200 — seconds detection time interval |
| Single UDP Connection (AT+CIPMUX=1):
AT+CIPSTART=<Param1>,<Param2>,[<Param3>,<Param4>] |
OK
or ERROR or Already Connected |
Param1 — type (“TCP or UDP”)
Param2 — IP address Param3 — port number Optional: Param4 — UDP local port Param5 — UDP mode |
| Multiple UDP Connection (AT+CIPMUX=1):
AT+CIPSTART=<Param1>,<Param2>,<Param3>,[<Param4>,<Param5>] |
OK
or ERROR or Already Connected |
Param1 — link ID (0 to 4)
Param2 — type (“TCP or UDP”) Param3 — IP address Param4 — port number Optional: Param5 — UDP local port Param6 — UDP mode |
Example:
AT+CIPSTART=”TCP”,”teachmemicro.com”,8080
AT+CIPSTART=”TCP”,”172.180.2.3”,80,5000
AT+CIPSTART=”UDP”,192.168.10.110”,1000,1001,1
Send Data
| Command | Response | Parameter |
|---|---|---|
| Single Connection (AT+CIPMUX=0):
AT+CIPSEND=<Param> |
Wrap return > after the Set Command. Begin
receiving serial data. When data length defined by <length> is met, the transmission of data starts. If the connection cannot be established or gets disrupted during data transmission, the system returns: ERROR If data is transmitted successfully, the system returns: SEND OK If it failed, the system returns: SEND FAIL |
Param — data length (up to 2048 bytes) |
| Multiple Connection (AT+CIPMUX=1):
AT+CIPSEND=<Param1>,<Param2> |
Same response as above | Param1 — link ID (0 to 4)
Param2 — data length (up to 2048 bytes) |
Close Connection
| Command | Response | Parameter |
|---|---|---|
| Single Connection:
AT+CIPCLOSE |
OK | – |
| Multiple Connection:
AT+CIPCLOSE=<Param> |
OK | Param — id of connection to close. Id = 5 closes all connection |
Enter deep-sleep mode
| Command | Response | Parameter |
|---|---|---|
| AT+GLSP=<Param> | <Param>
OK |
Param : time in milliseconds |
Example:
AT+GLSP=1000
Note: Reset pin should be high
Enable/Disable echo:
| Command | Response | Parameter |
|---|---|---|
| ATE0 | OK | – |
| ATE1 | OK | – |
Note: turning on echo sends back the command you sent
Enable/Disable DHCP
| Command | Response | Parameter |
|---|---|---|
| AT+CWDHCP=<Param1>, <Param2> | OK | Param1 — mode:
0 — set as SoftAP 1 — set as station 2 — set as SoftAP + station Param2 — enable: 0 — enable DHCP 1 — disable DHCP |
Get Local IP Address
| Command | Response | Parameter |
|---|---|---|
| AT+CIFSR | +CIFSR:<Param>
OK |
Param — IP address |
Configure Device as Server
| Command | Response | Parameter |
|---|---|---|
| AT+CIPSERVER = <Param1>,[<Param2>] | OK | Param1 — mode
0 — delete server 1 — create server Optional: Param2 — port number (default:333) |
Note: Server creation is allowed only if multiple connections is enabled (AT+CIPMUX=1)
Set Max Connections to the Server
| Command | Response | Parameter |
|---|---|---|
| AT+CIPSERVERMAXCONN = <Param> | OK | Param — number of connections (1 to 5) |
Set Transmission Mode
| Command | Response | Parameter |
|---|---|---|
| AT+CIPMODE = <Param> | OK | Param — mode
0 — normal transmission 1 — transparent transmission (UART-WiFi passthrough) |
Note: Setting transmission mode is allowed only for single TCP connection or UDP mde where both remote IP and port do not change
Ping
| Command | Response | Parameter |
|---|---|---|
| AT+PING = <Param> | +<time>
OK |
Param — IP address or host name
time — response time of ping |
Example:
AT+PING = “teachmemicro.com”
Typical AT Command Sequence for Getting a Webpage
AT+CIPMUX=1 AT+CWMODE=3 AT+CWJAP=”this_is_my_wifi”,”1234” AT+CIPSTART=0,"TCP","teachmemicro.com","80” AT+CIPSEND=0,16 >GET / HTTP/1.1
