WiFi

How to connect your NG to the internet

The cheap chinese ESP8266 Wifi modules can be used to establish a WLAN connection to your NG easily.

Prepare your ESP8266 module

Pin Connection

Initial settings

Connect your ESP8266 to your PC with a NGUSB or other serial UART adapter. Attach a 3,3V power supply.

Open a serial terminal (minicom, TeraTerm, Putty, …)

Find out the baudrate of your ESP8266. Try out different baudrates, reboot the ESP8266 and see if readable text appears on your terminal. Set the baudrate to 115200 . {{{ AT+CIOBAUD=115200 }}} Some firmwares need CR+LF for command confirmation. Most terminals only send LF when pressing Return. Press CTRL+M, CTRL+J after every AT command in this case.

For more details and troubleshooting, see http://www.esp8266.com/wiki/doku.php?id=getting-started-with-the-esp8266

Firmware Update

The AT+GMR command should print your firmware version: . {{{ AT+GMR 00200.9.5(b1) compiled @ Dec 25 2014 21:40:28 AI-THINKER Dec 25 2014

OK }}} Firmware binaries and update instructions can be found here: http://www.electrodragon.com/w/ESP8266_Firmware

My module is working with AI-v0.9.5.0 AT Firmware

Operate your ESP8266 at your NG

Connection

Connect the ESP8266 module to a UART of your NG. Make sure there is a 3,3V supply at the VCC pin of your NG uart. Check the soldering jumpers of your UAVP-FC.

In the NGOS settings, configure the uart to operate in esp8266 mode: . {{{ set HW.uart0.baud 115200 set HW.uart0.mode esp8266 }}}

Reboot your NG or start the WLAN module with . {{{ wlan init }}}

Show the connection state . {{{ wlan status Connection established to 192.168.4.2. }}}

Modes of Operation

There are two different modes of operation:

The module usees WPA2 PSK encryption.

Configure AP mode

In the NGOS settings, set . {{{ set WLAN.SSID <CreateAnAPName> set WLAN.pw <YourTopSecretPassword> set WLAN.NGisAP yes }}}

Configure station mode

In the NGOS settings, set . {{{ set WLAN.SSID <YourLocalSSID> set WLAN.pw <YourTopSecretPassword> set WLAN.NGisAP no set WLAN.ip <IP address of the PC you want to connect to> }}}

Connect a Linux Console to your NGOS

Using the UNIX command NC to wait on a port for incoming connections

After a WLAN connection is established, the NG tries to establish a connection to TCP port 1234.

On Linux, you can use netcat to establish a console connection to your NG . {{{ nc -l -C -p 1234 UAVP connected.

}}}

Using the UNIX command SOCAT to wait on a port for incoming connections

After a WLAN connection is established, the NG tries to establish a connection to TCP port 1234.

On Linux, you can use socat to establish a console connection to your NG . {{{ socat -d -d TCP4-LISTEN:1234,crnl READLINE,history=$HOME/.http_history UAVP connected.

}}}

Using the UNIX command SOCAT to connect to a port on the NG

. {{{ socat -d -d READLINE,history=$HOME/.http_history TCP4:172.x.y.z:1234,crnl }}}