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@8:f819de1946a7, 2014-12-19 (annotated)

Committer:: sschocke
Date:: Fri Dec 19 09:08:56 2014 +0000
Revision:: 8:f819de1946a7
Parent:: 7:f15c81074400
Child:: 9:319aeb6e0123

8 LED firmware with support for F302 Nucleo added

Who changed what in which revision?

User	Revision	Line number	New 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	7:f15c81074400	21	void rxint(void) {
sschocke	7:f15c81074400	22	server.rxint();
sschocke	0:d21e3e1c0a4b	23	}
sschocke	0:d21e3e1c0a4b	24
tomvdb	4:4a502f72cbe3	25	void setColor( uint8_t r, uint8_t g, uint8_t b )
tomvdb	4:4a502f72cbe3	26	{
tomvdb	4:4a502f72cbe3	27	for ( int c = 0; c < LED_COUNT; c++ )
tomvdb	4:4a502f72cbe3	28	{
tomvdb	4:4a502f72cbe3	29	colors[c].red = r;
tomvdb	4:4a502f72cbe3	30	colors[c].green = g;
tomvdb	4:4a502f72cbe3	31	colors[c].blue = b;
tomvdb	4:4a502f72cbe3	32	}
tomvdb	4:4a502f72cbe3	33
tomvdb	4:4a502f72cbe3	34	ledStrip.write(colors, LED_COUNT);
tomvdb	4:4a502f72cbe3	35	}
tomvdb	4:4a502f72cbe3	36
sschocke	0:d21e3e1c0a4b	37	int main() {
sschocke	0:d21e3e1c0a4b	38	pc.printf("WiFi Lamp Test...\r\n");
tomvdb	4:4a502f72cbe3	39
tomvdb	4:4a502f72cbe3	40	setColor( 250, 0, 0);
tomvdb	4:4a502f72cbe3	41
sschocke	0:d21e3e1c0a4b	42	wifiCHPD = 0;
sschocke	0:d21e3e1c0a4b	43	wifiReset = 0;
sschocke	0:d21e3e1c0a4b	44	wifiSerial.baud(9600);
sschocke	0:d21e3e1c0a4b	45	wifiSerial.attach(&rxint);
sschocke	7:f15c81074400	46	#ifdef DEBUG_WIFI
sschocke	7:f15c81074400	47	server.debugSerial = &pc;
sschocke	7:f15c81074400	48	#endif
sschocke	0:d21e3e1c0a4b	49	wait_ms(1000);
sschocke	0:d21e3e1c0a4b	50
sschocke	0:d21e3e1c0a4b	51	pc.printf("Powering WiFi...\r\n");
sschocke	0:d21e3e1c0a4b	52	wifiCHPD = 1;
sschocke	0:d21e3e1c0a4b	53	wait_ms(250);
sschocke	0:d21e3e1c0a4b	54	pc.printf("Hardware Reset WiFi...\r\n");
sschocke	0:d21e3e1c0a4b	55	wifiReset = 1;
sschocke	0:d21e3e1c0a4b	56	wifiOn = 1;
sschocke	0:d21e3e1c0a4b	57
sschocke	7:f15c81074400	58	pc.printf("Starting Web Server...\r\n");
sschocke	7:f15c81074400	59	server.Initialize();
sschocke	0:d21e3e1c0a4b	60	pc.printf("Done\r\n");
sschocke	0:d21e3e1c0a4b	61
tomvdb	4:4a502f72cbe3	62	setColor( 0, 250, 0);
tomvdb	4:4a502f72cbe3	63	wait_ms(500);
tomvdb	4:4a502f72cbe3	64	setColor( 0, 0, 0);
tomvdb	4:4a502f72cbe3	65
sschocke	0:d21e3e1c0a4b	66	while(true) {
sschocke	7:f15c81074400	67	if( server.GetRequest() == true ) {
sschocke	7:f15c81074400	68	pc.printf("HTTP %s %s\r\n", server.Method.c_str(), server.URI.c_str());
sschocke	7:f15c81074400	69	std::string httpReply;
sschocke	7:f15c81074400	70	if( server.URI == "/" ) {
sschocke	7:f15c81074400	71	httpReply = "<html><head><title>WiFi Lamp</title></head><body><h1>The WiFi Lamp is alive(<a href='/red'>Red</a>)</h1></body></html>";
sschocke	7:f15c81074400	72	setColor(0,0,0);
sschocke	7:f15c81074400	73	server.SendHTMLReply(server.LinkID, httpReply);
sschocke	7:f15c81074400	74	} else if( server.URI == "/red" ) {
sschocke	7:f15c81074400	75	httpReply = "<html><head><title>WiFi Lamp</title></head><body><h1>The WiFi Lamp(Red) is alive(<a href='/'>Off</a>)</h1></body></html>";
sschocke	7:f15c81074400	76	setColor(100, 0, 0);
sschocke	7:f15c81074400	77	server.SendHTMLReply(server.LinkID, httpReply);
sschocke	7:f15c81074400	78	} else if ( server.URI.substr(0, 9) == "/setcolor" ) {
tomvdb	4:4a502f72cbe3	79
sschocke	7:f15c81074400	80	int r=0, g=0, b=0;
sschocke	7:f15c81074400	81
sschocke	7:f15c81074400	82	r = atoi( server.URI.substr( 12,3 ).c_str() );
sschocke	7:f15c81074400	83	g = atoi( server.URI.substr( 18,3 ).c_str() );
sschocke	7:f15c81074400	84	b = atoi( server.URI.substr( 24,3 ).c_str() );
sschocke	7:f15c81074400	85
sschocke	7:f15c81074400	86	pc.printf( "Set color to (%i, %i, %i)\r\n", r,g,b);
sschocke	0:d21e3e1c0a4b	87
sschocke	7:f15c81074400	88	setColor( r,g,b );
sschocke	7:f15c81074400	89
sschocke	7:f15c81074400	90	httpReply = "<html><head><title>WiFi Lamp</title></head><body>ok</body></html>";
sschocke	7:f15c81074400	91	server.SendHTMLReply(server.LinkID, httpReply);
sschocke	7:f15c81074400	92	} else {
sschocke	7:f15c81074400	93	server.Send404Reply(server.LinkID);
sschocke	0:d21e3e1c0a4b	94	}
sschocke	7:f15c81074400	95	pc.printf("\r\nHTTP Reply Sent\r\n");
sschocke	0:d21e3e1c0a4b	96	}
sschocke	1:f07afcffeb5a	97
sschocke	0:d21e3e1c0a4b	98	wait_ms(10);
sschocke	0:d21e3e1c0a4b	99	}
sschocke	0:d21e3e1c0a4b	100	}