SwiCago wrote:Hi Chris,
Here is a working sample...The only thing I could not test is the actual ws2812 update, but the color from web and converting it to numbers that the NeoPixelBus understands works.
I had to make my own hex string to int converter, because of strtol causing the esp to crash.Code: Select all#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <NeoPixelBus.h>
#define pixelCount 4 //number of pixels in RGB strip
NeoPixelBus strip = NeoPixelBus(pixelCount, 0); //GPIO 0
const char* ssid = "MY_ROUTER";
const char* password = "MY_PASSWD";
IPAddress apIP(192, 168, 1, 1); //FOR AP mode
IPAddress netMsk(255,255,255,0); //FOR AP mode
const char* html = "<html><head><style></style></head>"
"<body><form action='/' method='GET'><input type='color' name='color' value='#000000'/>"
"<input type='submit' name='submit' value='Update RGB Strip'/></form></body></html>";
ESP8266WebServer server(80);
void setup() {
Serial.begin(115200);
strip.Begin();
strip.Show();
//***************WIFI client************************//
WiFi.begin(ssid, password);
Serial.print("\n\r \n\rWorking to connect");
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
//***************WIFI ACCESS POINT******************//
/* WiFi.mode(WIFI_AP);
WiFi.softAPConfig(apIP,apIP,netMsk);
WiFi.softAP(ssid);//,password); //leave password away for open AP
Serial.print("SSID: ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.softAPIP()); */
//**************************************************//
server.on("/", handle_root); //root page
server.onNotFound(handleNotFound); //page if not found
server.begin();
Serial.println("HTTP server started");
}
void loop() {
server.handleClient();
}
void handleNotFound() {
Serial.print("\t\t\t\t URI Not Found: ");
Serial.println(server.uri());
server.send ( 200,"text/plain","URI Not Found" );
}
void handle_root() {
String toSend = html;
if (server.hasArg("color")) {
String rgbStr = server.arg("color"); //get value from html5 color element
rgbStr.replace("%23","#"); //%23 = # in URI
toSend.replace("#000000",rgbStr); //replace our default black with new color, so when page loads our new color shows
int rgb[3]; //define rgb pointer for ws2812
getRGB(rgbStr,rgb); //convert RGB string to rgb ints
updateEntireStrip(rgb[0], rgb[1], rgb[2]); //update strip
}
server.send(200, "text/html", toSend);
delay(100);
}
void getRGB(String hexRGB, int *rgb) {
hexRGB.toUpperCase();
char c[7];
hexRGB.toCharArray(c,8);
rgb[0] = convertToInt(c[1],c[2]); //red
rgb[1] = convertToInt(c[3],c[4]); //green
rgb[2] = convertToInt(c[5],c[6]); //blue
}
int convertToInt(char upper,char lower)
{
int uVal = (int)upper;
int lVal = (int)lower;
uVal = uVal >64 ? uVal - 55 : uVal - 48;
uVal = uVal << 4;
lVal = lVal >64 ? lVal - 55 : lVal - 48;
return uVal + lVal;
}
void updateEntireStrip(int red, int blue, int green) {
RgbColor rgb = RgbColor(red, blue, green);
for(int i=0; i < pixelCount; i++) {
strip.SetPixelColor(i,rgb);
}
strip.Show();
}
Thanks for this sample code! It works without a problem on newest lib and Arduino 1.6.5