LANC and WiFi Remote control for Canon XA25 HD Camcorder

The Netlinx NI-700 controller and the AXP-PLV touchscreen and joystick control panel

Version 1

When upgrading my video production equipment to HD I had to find a replacement for my two Sony BRC300 Pan-Tilt-Zoom cameras.
There are several brands and models of HD PTZ cameras available but as I mostly do this as a hobby, I’d rather use the money for
other stuff so when Canon released their XA25 HD camcorder with HD-SDI output I bought one and mounted it on an old AXB-PT10
Pan-Tilt-head from AMX. The PT10 is controlled from a AMX NI-700 control system and a AXP-PLV touchscreen and joystick camera
controller that was bought cheap from EBay.

Canon XA25 camera monted on AMX (Panja) AXB-PT10 Pan-Tilt unit

Pan and Tilt movement was now working but still no Zoom and Focus. The PT10 head was used with CCTV cameras with regular
motorized lenses but as the XA25 is a compact camcorder there was no way to connect drive signals to the lens.
The XA25 however can be remote controlled in three ways, some controls by LANC, some by IR and many more functions by WiFi
and a builtin web-remote.

For some reason the PT10 head has a RS232 serial connector as a second way of controlling the camera!

After some modifications to the Netlinx program that the AMX system is running I managed to get it to send Zoom and Focus
commands to the serial port. The serial port was then connected to an Arduino Micro that runs code to convert the Zoom and
Focus commands to the LANC protocol that the camera can understand.

The small box in top of the PT10 contains the Arduino Micro that converts
RS232 commands to LANC.

This setup was used mostly as a proof of concept for a few concerts that I made the video production for and it worked great!
I also had a small WiFi to TP bridge close to the camera and a CAT5 cable to a computer that could be used to run the built in
web-remote in the camera from a distance. This was used to control all the less time critical but still important things that
couldn’t be controlled by LANC, mostly white-balance, iris and gain.

Version 2

As everything can be improved, I started to think about controlling all the camera functions from the AMX touchscreen. Another
“problem” was that I'm planning on buying another camera, and the camera WiFi remote just seems to be an access point with
a fixed IP-address for the camera. This made it harder to connect more than one camera without doing some kind of NAT to be
able to “move” one of the cameras to another IP. Instead I’m now working on another solution.

The Arduino Micro that did the RS232 to LANC conversion was replaced with an Arduino Mega with a WiFi shield. I then added
a few pages and buttons to the AMX touch screen and once again modified the control system software to send serial commands
for my new buttons.

The new "Mode" menu. First row selects "Recording Program"
Second row selects White-Balance mode.
The big textbox contains responses from the Arduino.
Far right buttons are used to power the camera on or off.

"Kelvin menu" - Manual white balance

Gain & Exposure menu

Then the little bit tricky part began. I started to reverse engineer the XA25 web-remote. Wireshark was used to record the TCP
packets as I clicked thru all the functions in the remote.

The client sends HTTP GET requests and the camera responds with json formatted data.

A cookie named “acid” (in the range 0x0000 to 0xFFFF is sent by the camera in the first response and is then used for session control.

To keep the connection, a “request status” packet must be sent every 10 seconds or so. As for now I think that the sequence
counter in the “request status” package doesn’t matter. I just set it to "1" all the time.

All the commands:

Arduino Mega, WiFi Shield, "Mega Extension Shield", RS232-driver.
The led will be replaced with a relay that controls camera power.
The LANC circut wasn't connected when this picture was taken, It will probably
be built on the spare pads on my "Mega Extension Shield" (built for an earlier project).

An early and dirty but working version of the Arduino sketch:

/* Gateway AMX AXB-PT10 ---> Canon XA25 LANC + WEB/API (C) By DETKON Christian Mohr 2013-2014 www.detkon.se */ #include <SPI.h> #include <WiFi.h> IPAddress server(192,168,0,80); char ssid[] = "XA-xxxx_Canonxx"; char pass[] = "xxxxxxxx"; int status = WL_IDLE_STATUS; WiFiClient client; byte led1 = 9; byte XA25PWRpin = 2; #define cmdPin A2 #define lancPin A3 boolean LANCenabled = true; boolean debug = false; int c_led; int z_tout; int f_tout; int z_state; int f_state; byte inchar[3]; int seq = 0; long lastping = 0; // XA25 Ethernet API uint8_t buffmax = 35; String sbuff; String cookie; // lanc vars int cmdRepeatCount; int bitDuration = 104; //Duration of one LANC bit in microseconds. //Zoom in from slowest to fastest speed boolean ZOOM_IN_0[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,LOW,LOW,LOW,LOW,LOW}; //28 00 boolean ZOOM_IN_1[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,LOW,LOW,LOW,HIGH,LOW}; //28 02 boolean ZOOM_IN_2[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,LOW,LOW,HIGH,LOW,LOW}; //28 04 boolean ZOOM_IN_3[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,LOW,LOW,HIGH,HIGH,LOW}; //28 06 boolean ZOOM_IN_4[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,LOW,HIGH,LOW,LOW,LOW}; //28 08 boolean ZOOM_IN_5[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,LOW,HIGH,LOW,HIGH,LOW}; //28 0A boolean ZOOM_IN_6[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,LOW,HIGH,HIGH,LOW,LOW}; //28 0C boolean ZOOM_IN_7[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,LOW,HIGH,HIGH,HIGH,LOW}; //28 0E //Zoom out from slowest to fastest speed boolean ZOOM_OUT_0[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,HIGH,LOW,LOW,LOW,LOW}; //28 10 boolean ZOOM_OUT_1[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,HIGH,LOW,LOW,HIGH,LOW}; //28 12 boolean ZOOM_OUT_2[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,HIGH,LOW,HIGH,LOW,LOW}; //28 14 boolean ZOOM_OUT_3[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,HIGH,LOW,HIGH,HIGH,LOW}; //28 16 boolean ZOOM_OUT_4[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,HIGH,HIGH,LOW,LOW,LOW}; //28 18 boolean ZOOM_OUT_5[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,HIGH,HIGH,LOW,HIGH,LOW}; //28 1A boolean ZOOM_OUT_6[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,HIGH,HIGH,HIGH,LOW,LOW}; //28 1C boolean ZOOM_OUT_7[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,LOW,LOW,HIGH,HIGH,HIGH,HIGH,LOW}; //28 1E //Focus control. Camera must be switched to manual focus boolean FOCUS_NEAR[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,HIGH,LOW,LOW,LOW,HIGH,HIGH,HIGH}; //28 47 boolean FOCUS_FAR[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,HIGH,LOW,LOW,LOW,HIGH,LOW,HIGH}; //28 45 boolean FOCUS_AUTO[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,HIGH,LOW,LOW,LOW,LOW,LOW,HIGH}; //28 41 boolean FOCUS_PUSH[] = {LOW,LOW,HIGH,LOW,HIGH,LOW,LOW,LOW, LOW,HIGH,LOW,LOW,LOW,LOW,HIGH,HIGH}; //28 43 /* MEMORY USAGE: * This can be used to track free memory. * Include "MemoryFree.h" and use the following line * Serial << F("freeMemory()=") << freeMemory() << "\n"; * in your code to see available memory. */ #include <MemoryFree.h> // no-cost stream operator as described at // http://arduiniana.org/libraries/streaming/ template<class T> inline Print &operator <<(Print &obj, T arg) { obj.print(arg); return obj; } */ LANC communication by Martin Koch 2011 http://controlyourcamera.blogspot.com/2011/02/arduino-controlled-video-recording-over.html */ void lancCommand(boolean lancBit[]) { if ( LANCenabled ) { cmdRepeatCount = 4; while (cmdRepeatCount < 5) { //repeat 5 times to make sure the camera accepts the command while (pulseIn(lancPin, HIGH) < 5000) { //"pulseIn, HIGH" catches any 0V TO +5V TRANSITION and waits until the LANC line goes back to 0V //"pulseIn" also returns the pulse duration so we can check if the previous +5V duration was long enough (>5ms) to be the pause before a new 8 byte data packet //Loop till pulse duration is >5ms } //LOW after long pause means the START bit of Byte 0 is here delayMicroseconds(bitDuration); //wait START bit duration //Write the 8 bits of byte 0 //Note that the command bits have to be put out in reverse order with the least significant, right-most bit (bit 0) first for (int i=7; i>-1; i--) { digitalWrite(cmdPin, lancBit[i]); //Write bits. delayMicroseconds(bitDuration); } //Byte 0 is written now put LANC line back to +5V digitalWrite(cmdPin, LOW); delayMicroseconds(10); //make sure to be in the stop bit before byte 1 while (digitalRead(lancPin)) { //Loop as long as the LANC line is +5V during the stop bit } //0V after the previous stop bit means the START bit of Byte 1 is here delayMicroseconds(bitDuration); //wait START bit duration //Write the 8 bits of Byte 1 //Note that the command bits have to be put out in reverse order with the least significant, right-most bit (bit 0) first for (int i=15; i>7; i--) { digitalWrite(cmdPin,lancBit[i]); //Write bits delayMicroseconds(bitDuration); } //Byte 1 is written now put LANC line back to +5V digitalWrite(cmdPin, LOW); cmdRepeatCount++; //increase repeat count by 1 /*Control bytes 0 and 1 are written, now don’t care what happens in Bytes 2 to 7 and just wait for the next start bit after a long pause to send the first two command bytes again.*/ }//While cmdRepeatCount < 5 } } void XA25_setMode( char m ) { client.print("GET /api/cam/setprop?recp="); switch ( m ) { case 'p' : client.print("P"); break; case 'm' : client.print("M"); break; case 'a' : client.print("Av"); break; case 't' : client.print("Tv"); break; case 's' : client.print("SCN"); break; } client.println(" HTTP/1.1"); client.print("Cookie: acid="); client.println(cookie); client.println(); } void XA25_setWBMode( char m ) { client.print("GET /api/cam/setprop?wbm="); switch ( m ) { case 'a' : client.print("Automatic"); break; case '1' : client.print("PresetA"); break; case '2' : client.print("PresetB"); break; case 'k' : client.print("Kelvin"); break; } client.println(" HTTP/1.1"); client.print("Cookie: acid="); client.println(cookie); client.println(); } void XA25_setWBPreset( void ) { client.println("GET /api/cam/getprop?r=wbv HTTP/1.1"); client.print("Cookie: acid="); client.println(cookie); client.println(); } void XA25_setKelvin( char m1, char m2 ) { // 2000 - 15000 byte tmp = 0; int kelvin; if ( (m1>='0') && (m1<='9') ) { tmp = tmp + ((m1-48)*16); } if ( (m1>='A') && (m1<='F') ) { tmp = tmp + ((m1-55)*16); } if ( (m2>='0') && (m2<='9') ) { tmp = tmp + (m2-48); } if ( (m2>='A') && (m2<='F') ) { tmp = tmp + (m2-55); } if (tmp % 2) { tmp--; } kelvin = 2000 + (tmp * 50); client.print("GET /api/cam/setprop?wbv="); client.print(kelvin); client.println(" HTTP/1.1"); client.print("Cookie: acid="); client.println(cookie); client.println(); } void XA25_setShutter( char m1, char m2 ) { byte tmp = 0; if ( (m1>='0') && (m1<='9') ) { tmp = tmp + ((m1-48)*16); } if ( (m1>='A') && (m1<='F') ) { tmp = tmp + ((m1-55)*16); } if ( (m2>='0') && (m2<='9') ) { tmp = tmp + (m2-48); } if ( (m2>='A') && (m2<='F') ) { tmp = tmp + (m2-55); } tmp = tmp / 8; client.print("GET /api/cam/setprop?av="); switch ( tmp ) { case 1 : client.print("2.2"); break; case 2 : client.print("2.4"); break; case 3 : client.print("2.6"); break; case 4 : client.print("2.8"); break; case 5 : client.print("3.2"); break; case 6 : client.print("3.4"); break; case 7 : client.print("3.7"); break; case 8 : client.print("4.0"); break; case 9 : client.print("4.0N1/1.2"); break; case 10 : client.print("4.0N1/1.4"); break; case 11 : client.print("4.0N1/1.7"); break; case 12 : client.print("4.0N1/2"); break; case 13 : client.print("4.0N1/2.4"); break; case 14 : client.print("4.0N1/2.8"); break; case 15 : client.print("4.0N1/3.4"); break; case 16 : client.print("4.0N1/4"); break; case 17 : client.print("4.0N1/4.8"); break; case 18 : client.print("4.0N1/5.7"); break; case 19 : client.print("4.0N1/6.7"); break; case 20 : client.print("4.0N1/8"); break; case 21 : client.print("4.4N1/8"); break; case 22 : client.print("4.8N1/8"); break; case 23 : client.print("5.2N1/8"); break; case 24 : client.print("5.6N1/8"); break; case 25 : client.print("6.2N1/8"); break; case 26 : client.print("6.7N1/8"); break; case 27 : client.print("7.3N1/8"); break; case 28 : client.print("8.0N1/8"); break; } client.println(" HTTP/1.1"); client.print("Cookie: acid="); client.println(cookie); client.println(); } void XA25_setGain( char m1, char m2 ) { byte tmp = 0; if ( (m1>='0') && (m1<='9') ) { tmp = tmp + ((m1-48)*16); } if ( (m1>='A') && (m1<='F') ) { tmp = tmp + ((m1-55)*16); } if ( (m2>='0') && (m2<='9') ) { tmp = tmp + (m2-48); } if ( (m2>='A') && (m2<='F') ) { tmp = tmp + (m2-55); } client.print("GET /api/cam/setprop?gcv="); if ( (tmp>=0) && (tmp<=24) ) { client.print(tmp); client.print(".0"); } else if (tmp==25) { client.print("MAX"); } client.println(" HTTP/1.1"); client.print("Cookie: acid="); client.println(cookie); client.println(); } void XA25_setExComp( char m1, char m2 ) { float tmp = 0; if ( (m1>='0') && (m1<='9') ) { tmp = tmp + ((m1-48)*16); } if ( (m1>='A') && (m1<='F') ) { tmp = tmp + ((m1-55)*16); } if ( (m2>='0') && (m2<='9') ) { tmp = tmp + (m2-48); } if ( (m2>='A') && (m2<='F') ) { tmp = tmp + (m2-55); } tmp = tmp / 4; tmp = tmp - 3; client.print("GET /api/cam/setprop?ev="); if (debug) Serial.print("GET /api/cam/setprop?ev="); char buff[8]; dtostrf(tmp,4,2,buff); if (buff[0]=='-') { if (buff[4]=='0') { buff[4] = 0; } } else { if (buff[3]=='0') { buff[3] = 0; } } client.print(buff); if (debug) Serial.print(buff); client.println(" HTTP/1.1"); if (debug) Serial.println(" HTTP/1.1"); client.print("Cookie: acid="); client.println(cookie); client.println(); } void XA25_ping( void ) { client.print("GET /api/cam/getcurprop?seq=1"); if (debug) Serial.print("GET /api/cam/setcurprop?seq=1"); client.println(" HTTP/1.1"); if (debug) Serial.println(" HTTP/1.1"); client.print("Cookie: acid="); client.println(cookie); client.println(); } void printWifiStatus() { // print the SSID of the network you're attached to: Serial.print("SSID: "); Serial.println(WiFi.SSID()); // print your WiFi shield's IP address: IPAddress ip = WiFi.localIP(); Serial.print("IP Address: "); Serial.println(ip); // print the received signal strength: long rssi = WiFi.RSSI(); Serial.print("Signal strength (RSSI):"); Serial.print(rssi); Serial.println(" dBm"); } void setup() { // Setup I/O-pins pinMode(led1, OUTPUT); pinMode(lancPin, INPUT); //listens to the LANC line pinMode(cmdPin, OUTPUT); //writes to the LANC line digitalWrite(cmdPin, LOW); //set LANC line to +5V pinMode(XA25PWRpin, OUTPUT); digitalWrite(XA25PWRpin, HIGH); bitDuration = bitDuration - 8; //Writing to the digital port takes about 8 microseconds so only 96 microseconds are left for each bit Serial.begin(9600); Serial << F("\n- - - - - - - -\nSerial Started\n"); Serial3.begin(9600); Serial3 << "BOOT\n"; // check for the presence of the shield: if (WiFi.status() == WL_NO_SHIELD) { Serial << "WLAN Shield not detected, halting.\n"; Serial3 << "NOWL\n"; // don't continue: while(true); } // attempt to connect to Wifi network: while (status != WL_CONNECTED) { Serial << "Searching for SSID: " << ssid << "...\n"; Serial3 << "SSID\n"; // Connect to WPA/WPA2 network. Change this line if using open or WEP network: status = WiFi.begin(ssid, pass); // wait 5 seconds for connection: delay(5000); } Serial << "WLAN Connected OK\n"; Serial3 << "WLOK\n"; printWifiStatus(); delay(1000); //Wait for camera to power up completly digitalWrite(led1, HIGH); delay(200); digitalWrite(led1, LOW); delay(500); digitalWrite(led1, HIGH); delay(200); digitalWrite(led1, LOW); z_tout = 0; f_tout = 0; } void loop() { byte incoming; if (Serial3.available() > 0) { incoming = Serial3.read(); // Packet complete, Identify & Execute command if (incoming==' ') { if ( (inchar[0]==0) && (inchar[1]=='Z') && (inchar[2]>='1') && (inchar[2]<='8') ) { z_tout = 3000; z_state = (inchar[2]-48); if (debug) Serial << F("ZCMD: +") << (inchar[2]-48) << F("\n"); } if ( (inchar[0]==0) && (inchar[1]=='z') && (inchar[2]>='1') && (inchar[2]<='8') ) { z_tout = 3000; z_state = -(inchar[2]-48); if (debug) Serial << F("ZCMD: -") << (inchar[2]-48) << F("\n"); } if ( (inchar[0]==0) && ( (inchar[1]=='Z') || (inchar[1]=='z') ) && (inchar[2]=='S') ) { z_tout = 0; z_state = 0; if (debug) Serial << F("ZCMD: STOP!\n"); } if ( (inchar[0]==0) && (inchar[1]=='F') && (inchar[2]>='1') && (inchar[2]<='8') ) { f_tout = 3000; f_state = (inchar[2]-48); if (debug) Serial << F("FCMD: +") << (inchar[2]-48) << F("\n"); } if ( (inchar[0]==0) && (inchar[1]=='f') && (inchar[2]>='1') && (inchar[2]<='8') ) { f_tout = 3000; f_state = -(inchar[2]-48); if (debug) Serial << F("FCMD: -") << (inchar[2]-48) << F("\n"); } if ( (inchar[0]==0) && ( (inchar[1]=='F') || (inchar[1]=='f') ) && (inchar[2]=='S') ) { f_tout = 0; f_state = 0; if (debug) Serial << F("FCMD: STOP!\n"); } if ( (inchar[0]==0) && (inchar[1]=='A') && (inchar[2]=='F') ) { f_tout = 300; f_state = 1000; if (debug) Serial << F("FCMD: AFPUSH\n"); } if ( (inchar[0]==0) && (inchar[1]=='P') && ( (inchar[2]=='p') || (inchar[2]=='m') || (inchar[2]=='a') || (inchar[2]=='t') ) ) { XA25_setMode(inchar[2]); if (debug) Serial << F("XA25_setMode: ") << char(inchar[2]) << F("\n"); } if ( (inchar[0]==0) && (inchar[1]=='C') && ( (inchar[2]=='a') || (inchar[2]=='1') || (inchar[2]=='2') || (inchar[2]=='k') ) ) { XA25_setWBMode(inchar[2]); if (debug) Serial << F("XA25_setWBMode: ") << char(inchar[2]) << F("\n"); } if ( (inchar[0]==0) && (inchar[1]=='C') && (inchar[2]=='x') ) { XA25_setWBPreset(); if (debug) Serial << F("XA25_setWBPreset!\n"); } if ( (inchar[0]=='K') && ( ( (inchar[1]>='0') && (inchar[1]<='9') ) || ( (inchar[1]>='A') && (inchar[1]<='F') ) ) && ( ( (inchar[2]>='0') && (inchar[2]<='9') ) || ( (inchar[2]>='A') && (inchar[2]<='F') ) ) ) { XA25_setKelvin(inchar[1],inchar[2]); if (debug) Serial << F("XA25_setKelvin: ") << char(inchar[1]) << char(inchar[2]) << F("\n"); } if ( (inchar[0]=='B') && ( ( (inchar[1]>='0') && (inchar[1]<='9') ) || ( (inchar[1]>='A') && (inchar[1]<='F') ) ) && ( ( (inchar[2]>='0') && (inchar[2]<='9') ) || ( (inchar[2]>='A') && (inchar[2]<='F') ) ) ) { XA25_setShutter(inchar[1],inchar[2]); Serial << F("XA25_setShutter: ") << char(inchar[1]) << char(inchar[2]) << F("\n"); } if ( (inchar[0]=='G') && ( ( (inchar[1]>='0') && (inchar[1]<='9') ) || ( (inchar[1]>='A') && (inchar[1]<='F') ) ) && ( ( (inchar[2]>='0') && (inchar[2]<='9') ) || ( (inchar[2]>='A') && (inchar[2]<='F') ) ) ) { XA25_setGain(inchar[1],inchar[2]); Serial << F("XA25_setGain: ") << char(inchar[1]) << char(inchar[2]) << F("\n"); } if ( (inchar[0]=='E') && ( ( (inchar[1]>='0') && (inchar[1]<='9') ) || ( (inchar[1]>='A') && (inchar[1]<='F') ) ) && ( ( (inchar[2]>='0') && (inchar[2]<='9') ) || ( (inchar[2]>='A') && (inchar[2]<='F') ) ) ) { XA25_setExComp(inchar[1],inchar[2]); Serial << F("XA25_setExComp: ") << char(inchar[1]) << char(inchar[2]) << F("\n"); } if ( (inchar[0]==0) && (inchar[1]=='O') && (inchar[2]=='n') ) { digitalWrite(XA25PWRpin, HIGH); if (debug) Serial << F("XA25_Power: ON\n"); } if ( (inchar[0]==0) && (inchar[1]=='O') && (inchar[2]=='f') ) { digitalWrite(XA25PWRpin, LOW); if (debug) Serial << F("XA25_Power: OFF\n"); } if (debug) Serial << F("IN CMD: ") << char(inchar[0]) << char(inchar[1]) << char(inchar[2]) << F("\n"); if (debug) Serial << F("Z-STATE: ") << z_state << F("\n"); if (debug) Serial << F("F-STATE: ") << f_state << F("\n"); inchar[0] = 0; inchar[1] = 0; inchar[2] = 0; Serial3 << "SEQ: " << seq; ++seq; } else { inchar[0] = inchar[1]; inchar[1] = inchar[2]; inchar[2] = incoming; } } // Send LANC commands if (z_state == 1) { lancCommand(ZOOM_IN_0); } if (z_state == 2) { lancCommand(ZOOM_IN_1); } if (z_state == 3) { lancCommand(ZOOM_IN_2); } if (z_state == 4) { lancCommand(ZOOM_IN_3); } if (z_state == 5) { lancCommand(ZOOM_IN_4); } if (z_state == 6) { lancCommand(ZOOM_IN_5); } if (z_state == 7) { lancCommand(ZOOM_IN_6); } if (z_state == 8) { lancCommand(ZOOM_IN_7); } if (z_state == -1) { lancCommand(ZOOM_OUT_0); } if (z_state == -2) { lancCommand(ZOOM_OUT_1); } if (z_state == -3) { lancCommand(ZOOM_OUT_2); } if (z_state == -4) { lancCommand(ZOOM_OUT_3); } if (z_state == -5) { lancCommand(ZOOM_OUT_4); } if (z_state == -6) { lancCommand(ZOOM_OUT_5); } if (z_state == -7) { lancCommand(ZOOM_OUT_6); } if (z_state == -8) { lancCommand(ZOOM_OUT_7); } if (z_tout > 0) { --z_tout; if (z_tout == 0) { z_state = 0; if (debug) Serial << F("Z-Timeout!\n\n"); } } if ( (f_state >= 1) && (f_state <= 8) ) { lancCommand(FOCUS_NEAR); } if ( (f_state <=-1) && (f_state >=-8) ) { lancCommand(FOCUS_FAR); } if (f_state == 1000) { lancCommand(FOCUS_PUSH); if (debug) Serial << F("Sending AF\n"); } if (f_tout > 0) { --f_tout; if (f_tout == 0) { f_state = 0; if (debug) Serial << F("F-Timeout!\n\n"); } } if (c_led > 0) { --c_led; if (c_led == 0) { digitalWrite(led1, LOW); } else { digitalWrite(led1, HIGH); } } // Login to camera if( !client.connected() ) { if (debug) Serial.println("Connecting..."); Serial3 << "DOCN\n"; if (client.connect(server, 80)) { if (debug) Serial.println("Connected, get Cookie..."); Serial3 << "GETC\n"; client.println("GET /api/acnt/login HTTP/1.1"); client.println(); lastping = millis(); } else { if (debug) Serial.println("Connection failed!"); Serial3 << "NOCN\n"; client.stop(); } } else { // Send keep-alive if (millis() > lastping + 10000) { if (debug) Serial << "Ping!\n"; Serial3 << "PING\n"; lastping = millis(); XA25_ping(); } } // Get Answer from camera if (client.available()) { char c = client.read(); if (debug) Serial.print(c); if ( c == '\n' ) { // Cookie int t = -1; t = sbuff.indexOf("acid="); if ( t != -1 ) { cookie = sbuff.substring(t+5,t+9); if (debug) Serial << "Cookie Found: " << cookie << "!\n"; Serial3 << "COKI\n"; sbuff = ""; } t = sbuff.indexOf("\"res\":\"ok\",\"seq\":"); if ( t != -1 ) { if (debug) Serial << "Seq found: " << sbuff.substring(t+17,t+19) << "!\n"; sbuff = ""; } lastping = millis(); } // New Line else { sbuff += c; if ( sbuff.length() > buffmax ) { sbuff = sbuff.substring(1); } } } }

The LANC code is based on the work of Martin Koch: "Arduino powered simple LANC remote"

More great information on the LANC protocol can be found HERE