Sebastian Schocke / Mbed 2 deprecated WiFiLamp

WiFi RGB Lamp Web Server

Dependencies:   mbed ESP8266_WebServer

RGB WiFi Lamp

Firmware

This is the official firmware repository for the BinarySpace RGB WiFi Lamp project. This firmware is still in alpha stage, and subject to change.

Planned changes include:

  • Configure the WiFi Lamp to connect onto your SSID
  • Variety of operating modes like
    • Fixed colour operation
    • Rainbow gradient
    • Time-based colour changing
    • API-based colour changing

Connecting to the WiFi lamp

To connect to the WiFi lamp web server, scan for an open WiFi network using your cellphone, tablet or laptop that begins with the letters ESP_xxxxxx. This is the automatically created SSID of the ESP8266 WiFi module used in the lamp. Your WiFi client needs to be configured to use DHCP.

Once connected, simply point your browser at http://192.168.4.1 and you should see the rudementary web interface allowing you to switch the WiFi lamp on in the red colour or off.

A second option is to enter the following URL
http://192.168.4.1/setcolor?r=x&g=x&b=x
where x is a number between 0 and 255 for the intensity of (r)ed, (g)reen and (b)lue respectively. Any of the r,g,b parts not specified will automatically default to 0

Supported Platforms

  • ST Nucleo F103RB
  • ST Nucleo F302R8
  • ST Nucleo L152RE
  • ST Nucleo F401RE

Unsupported Platforms

  • ST Nucleo F030R8 (unsupported due to insufficient registers for PololuLed library)

How to update your firmware

One of the best things about the ST Nucleo series is that they enumerate as a USB Mass Storage device when plugged in. Updating the firmware is as simple as compiling it using mbed compiler(free registration required to use) for your selected platform, plugging in your Nucleo and copying the .bin file created by the compiler to the USB drive enumerated by the Nucleo. That's it!

Code is fully Open Source

Please feel free to fork this repository and to submit pull requests if you make any cool additions/changes.

If you are developing changes to the firmware and monitoring via serial console for debugging purposes, note than you can simply comment out the #define DEBUG_WIFI line at the top of the main.cpp file to make the output much less verbose. This effectively disables debugging of the WebServer library code and echoing of communications between the Nucleo and the ESP. It also makes the web server noticeably faster, as it doesn't have to output a lot of serial data before handling requests.

LED Strip colour inconsistency

If you are experiencing problems with the LED's not all changing colour, or perhaps flickering or incorrect colour, there could be 2 potential problems we have identified.

  • Power Supply problems - If the power supply is not providing enough power, or not clean enough power, you may experience flickering or random colour changes. Ensure that your power supply can provide enough power (1A @ 5V recommended). If this does not solve your problem, soldering a capacitor over the power supply lines(5V, GND) may help to clean out any noise from the power supply. (100uF minimum)
  • Depending on cable lengths and connectors, noise on the data line may also be a problem. Try soldering a 100Ω - 500Ω resistor in line on the Din pin of the LED strip

Firmware update for the ESP8266 Module

We suggest you upgrade the firmware on the ESP8266 module to the latest official AT firmware from Espressif. Click Here for a detailed upgrade quide.

main.cpp@11:3ab606a42227, 2014-12-28 (annotated)

Committer:
sschocke
Date:
Sun Dec 28 16:04:22 2014 +0000
Revision:
11:3ab606a42227
Parent:
9:319aeb6e0123
Child:
12:fbf950985e1c
WebServer API Updates for multiple content types

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sschocke 0:d21e3e1c0a4b 1 #include "mbed.h"
sschocke 1:f07afcffeb5a 2 #include "PololuLedStrip.h"
sschocke 7:f15c81074400 3 #include "ESP8266_WebServer.h"
sschocke 0:d21e3e1c0a4b 4 #include <string>
sschocke 0:d21e3e1c0a4b 5 #define DEBUG_WIFI
sschocke 0:d21e3e1c0a4b 6
sschocke 8:f819de1946a7 7 PololuLedStrip ledStrip(D11);
sschocke 1:f07afcffeb5a 8
sschocke 8:f819de1946a7 9 #define LED_COUNT 8
sschocke 1:f07afcffeb5a 10 rgb_color colors[LED_COUNT];
sschocke 1:f07afcffeb5a 11
sschocke 0:d21e3e1c0a4b 12 DigitalOut wifiCHPD(D4);
sschocke 0:d21e3e1c0a4b 13 DigitalOut wifiReset(D9);
sschocke 0:d21e3e1c0a4b 14
sschocke 0:d21e3e1c0a4b 15 int wifiOn = 0;
sschocke 0:d21e3e1c0a4b 16
sschocke 0:d21e3e1c0a4b 17 Serial wifiSerial(D8,D2);
sschocke 0:d21e3e1c0a4b 18 Serial pc(USBTX,USBRX);
sschocke 7:f15c81074400 19 ESP8266_WebServer server(&wifiSerial);
sschocke 0:d21e3e1c0a4b 20
sschocke 11:3ab606a42227 21 const char javascript[] = "function test() { alert('Hello'); }";
sschocke 11:3ab606a42227 22 const char css[] = "body { background: #DDDDDD; }";
sschocke 11:3ab606a42227 23
sschocke 7:f15c81074400 24 void rxint(void) {
sschocke 7:f15c81074400 25 server.rxint();
sschocke 0:d21e3e1c0a4b 26 }
sschocke 0:d21e3e1c0a4b 27
tomvdb 4:4a502f72cbe3 28 void setColor( uint8_t r, uint8_t g, uint8_t b )
tomvdb 4:4a502f72cbe3 29 {
tomvdb 4:4a502f72cbe3 30 for ( int c = 0; c < LED_COUNT; c++ )
tomvdb 4:4a502f72cbe3 31 {
tomvdb 4:4a502f72cbe3 32 colors[c].red = r;
tomvdb 4:4a502f72cbe3 33 colors[c].green = g;
tomvdb 4:4a502f72cbe3 34 colors[c].blue = b;
tomvdb 4:4a502f72cbe3 35 }
tomvdb 4:4a502f72cbe3 36
tomvdb 4:4a502f72cbe3 37 ledStrip.write(colors, LED_COUNT);
tomvdb 4:4a502f72cbe3 38 }
tomvdb 4:4a502f72cbe3 39
sschocke 0:d21e3e1c0a4b 40 int main() {
sschocke 0:d21e3e1c0a4b 41 pc.printf("WiFi Lamp Test...\r\n");
tomvdb 4:4a502f72cbe3 42
tomvdb 4:4a502f72cbe3 43 setColor( 250, 0, 0);
tomvdb 4:4a502f72cbe3 44
sschocke 0:d21e3e1c0a4b 45 wifiCHPD = 0;
sschocke 0:d21e3e1c0a4b 46 wifiReset = 0;
sschocke 0:d21e3e1c0a4b 47 wifiSerial.baud(9600);
sschocke 0:d21e3e1c0a4b 48 wifiSerial.attach(&rxint);
sschocke 7:f15c81074400 49 #ifdef DEBUG_WIFI
sschocke 7:f15c81074400 50 server.debugSerial = &pc;
sschocke 7:f15c81074400 51 #endif
sschocke 0:d21e3e1c0a4b 52 wait_ms(1000);
sschocke 0:d21e3e1c0a4b 53
sschocke 0:d21e3e1c0a4b 54 pc.printf("Powering WiFi...\r\n");
sschocke 0:d21e3e1c0a4b 55 wifiCHPD = 1;
sschocke 0:d21e3e1c0a4b 56 wait_ms(250);
sschocke 0:d21e3e1c0a4b 57 pc.printf("Hardware Reset WiFi...\r\n");
sschocke 0:d21e3e1c0a4b 58 wifiReset = 1;
sschocke 0:d21e3e1c0a4b 59 wifiOn = 1;
sschocke 0:d21e3e1c0a4b 60
sschocke 7:f15c81074400 61 pc.printf("Starting Web Server...\r\n");
sschocke 7:f15c81074400 62 server.Initialize();
sschocke 0:d21e3e1c0a4b 63 pc.printf("Done\r\n");
sschocke 0:d21e3e1c0a4b 64
tomvdb 4:4a502f72cbe3 65 setColor( 0, 250, 0);
tomvdb 4:4a502f72cbe3 66 wait_ms(500);
tomvdb 4:4a502f72cbe3 67 setColor( 0, 0, 0);
tomvdb 4:4a502f72cbe3 68
sschocke 0:d21e3e1c0a4b 69 while(true) {
sschocke 9:319aeb6e0123 70 ESP8266_WebRequest* request = server.GetRequest();
sschocke 9:319aeb6e0123 71 if( request != NULL ) {
sschocke 9:319aeb6e0123 72 pc.printf("HTTP %s %s\r\n", request->Method.c_str(), request->URI.c_str());
sschocke 9:319aeb6e0123 73 for( std::map<std::string,std::string>::iterator it = request->Parameters.begin(); it!=request->Parameters.end(); ++it ) {
sschocke 9:319aeb6e0123 74 pc.printf("HTTP Parameter %s = %s\r\n", it->first.c_str(), it->second.c_str());
sschocke 9:319aeb6e0123 75 }
sschocke 7:f15c81074400 76 std::string httpReply;
sschocke 9:319aeb6e0123 77 if( request->URI == "/" ) {
sschocke 11:3ab606a42227 78 httpReply = "<html><head>";
sschocke 11:3ab606a42227 79 httpReply += "<title>WiFi Lamp</title>";
sschocke 11:3ab606a42227 80 httpReply += "<link rel='stylesheet' type='text/css' href='wifilamp.css'>";
sschocke 11:3ab606a42227 81 httpReply += "<script type='text/javascript' src='wifilamp.js'></script>";
sschocke 11:3ab606a42227 82 httpReply += "</head><body>";
sschocke 11:3ab606a42227 83 httpReply += "<h1>The WiFi Lamp is alive(<a href='/red'>Red</a>)</h1>";
sschocke 11:3ab606a42227 84 httpReply += "</body></html>";
sschocke 11:3ab606a42227 85 server.SendReply(request->LinkID, httpReply, mimeHTML);
sschocke 11:3ab606a42227 86 } else if( request->URI == "/wifilamp.js" ) {
sschocke 11:3ab606a42227 87 server.SendReply(request->LinkID, javascript, sizeof(javascript), mimeJavaScript);
sschocke 11:3ab606a42227 88 } else if( request->URI == "/wifilamp.css" ) {
sschocke 11:3ab606a42227 89 server.SendReply(request->LinkID, css, sizeof(css), mimeCSS);
sschocke 9:319aeb6e0123 90 } else if ( request->URI == "/setcolor" ) {
sschocke 7:f15c81074400 91 int r=0, g=0, b=0;
sschocke 9:319aeb6e0123 92
sschocke 9:319aeb6e0123 93 if(request->Parameters.count("r") > 0) r=atoi(request->Parameters["r"].c_str());
sschocke 9:319aeb6e0123 94 if(request->Parameters.count("g") > 0) g=atoi(request->Parameters["g"].c_str());
sschocke 9:319aeb6e0123 95 if(request->Parameters.count("b") > 0) b=atoi(request->Parameters["b"].c_str());
sschocke 7:f15c81074400 96
sschocke 7:f15c81074400 97 pc.printf( "Set color to (%i, %i, %i)\r\n", r,g,b);
sschocke 0:d21e3e1c0a4b 98
sschocke 7:f15c81074400 99 setColor( r,g,b );
sschocke 7:f15c81074400 100
sschocke 7:f15c81074400 101 httpReply = "<html><head><title>WiFi Lamp</title></head><body>ok</body></html>";
sschocke 11:3ab606a42227 102 server.SendReply(request->LinkID, httpReply, mimeHTML);
sschocke 7:f15c81074400 103 } else {
sschocke 11:3ab606a42227 104 server.Send404Error(request->LinkID);
sschocke 0:d21e3e1c0a4b 105 }
sschocke 7:f15c81074400 106 pc.printf("\r\nHTTP Reply Sent\r\n");
sschocke 9:319aeb6e0123 107 delete request;
sschocke 0:d21e3e1c0a4b 108 }
sschocke 1:f07afcffeb5a 109
sschocke 0:d21e3e1c0a4b 110 wait_ms(10);
sschocke 0:d21e3e1c0a4b 111 }
sschocke 0:d21e3e1c0a4b 112 }