Hi,
I have RTL8720D and I tried to use some Neopixel with it. Neopixel is WS2812 and I connected it to pin 10. This is the sketch:
#include <Adafruit_NeoPixel.h>
#define PIN 10
Adafruit_NeoPixel strip = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);
void setup() {
strip.begin();
strip.setBrightness(50);
strip.show(); // Initialize all pixels to 'off'
}
void loop() {
colorWipe(strip.Color(0, 255, 0), 1000); // Green
//colorWipe(strip.Color(255, 0, 0), 1000); // Green
//colorWipe(strip.Color(0, 0, 255), 1000); // Green
colorWipe(strip.Color(0, 0, 0), 1000); // white
}
// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
for(uint16_t i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, c);
strip.show();
delay(wait);
}
}
With this setup, my Neopixel does not work. What am I doing wrong? I use Arduino IDE. I can blink regular LED on that pin. What could be wrong with Neopixel? Should I use some other pin?
Dear @dekip,
Thanks for your question. Currently, the Ameba Arduino SDK (which includes RTL8720DN) is not supporting WS2812 yet. Alternatively, you may proceed to our Github and requesting for this feature.
No worries, previously, some error issues were solved and updated on GitHub. You may post your enquires here again should you encounter any errors when you are back working on the project.
Started my project again.
But still no luck getting neopixel or any kind of WS28xx to work.
Even the example for “WS2812B.h” is not compiling here???
I use windows 10
Arduino IDE v2.0.3
BW16(RTL8720DN)
error text here to download: Dropbox - File Deleted - Simplify your life
#include “WS2812B.h”
#define NUM_OF_LEDS 8
// There are mutiple choice of SPI_MOSI pins depends on different boards. The default is SPI_MOSI/SPI1_MOSI
// AMB21/AMB22 pin 11/ pin21
// AMB23 pin 9/ pin 4
// BW16/BW16 Type C pin 12
// AW-CU488 ThingPlus pin 1/ pin 14
WS2812B led(SPI_MOSI, NUM_OF_LEDS);
void setup() {
Serial.begin(115200);
Serial.println(“WS2812B test”);
led.begin();
//Set a specific LED with a certain color
led.setPixelColor(0, 50, 0, 0);
led.setPixelColor(1, 0, 50, 0);
led.setPixelColor(2, 0, 0, 50);
led.show();
delay(1000);
//Fill the entire LED strip with the same color
led.fill(60, 0, 25, 0, 8);
led.show();
}
mmmm, it does work, but I get random spikes on the LED’s. All cables are very short.
I will investigate more tomorrow.
Here is my code.
#include "WS2812B.h"
#define NUM_OF_LEDS 170
// BW16/BW16 Type C pin 12
WS2812B led(SPI_MOSI, NUM_OF_LEDS);
#include <WiFi.h>
#include <WiFiUdp.h>
char ssid[] = "TP-ollie003"; // your network SSID (name)
char pass[] = "12341234"; // your network password
IPAddress ip(2, 0, 1, 101); // desired IP address
IPAddress gateway(2, 0, 1, 254); // gateway of my network
IPAddress subnet(255, 0, 0, 0); // subnet mask of my network
IPAddress dns(2, 1, 1, 1); // dns of my network
WiFiUDP Udp;
#define DMX_SUBNET 0
#define DMX_UNIVERSE 201 //**Start** universe
unsigned int localPort = 5568; // local port to listen on
#define ETHERNET_BUFFER 638 //540 is artnet leave at 636 for e1.31
unsigned char packetBuffer[ETHERNET_BUFFER];
int c = 4;
int status = WL_IDLE_STATUS; // the Wifi radio's status
byte Univ;
int VALuniv[513];
//**************************************************
void setup() {
pinMode(10, OUTPUT);
for (int i =0 ; i<20 ; i++){
digitalWrite(10, LOW);
delay(50);
digitalWrite(10, HIGH);
delay(50);
}
digitalWrite(10, LOW);
led.begin();
Serial1.begin(115200);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
if (WiFi.status() == WL_NO_SHIELD) {
Serial1.println("WiFi shield not present");
while (true);
}
WiFi.config(ip, dns, gateway, subnet);
while (status != WL_CONNECTED) {
Serial1.print("Attempting to connect to WPA SSID: ");
Serial1.println(ssid);
status = WiFi.begin(ssid, pass);
delay(1000);
}
Serial1.println();
Serial1.print("You're connected to the network");
digitalWrite(10, HIGH);
Udp.begin(localPort);
}
//**************************************************
int checkACNHeaders(unsigned char* messagein, int messagelength) {
if ( messagein[1] == 0x10 && messagein[4] == 0x41 && messagein[12] == 0x37) {
int addresscount = (byte) messagein[123] * 256 + (byte) messagein[124]; // number of values plus start code
return addresscount -1; //Return how many values are in the packet.
}
return 0;
}
//**************************************************
void loop() {
int packetSize = Udp.parsePacket(); //Read UDP packet count
if(packetSize){
Udp.read(packetBuffer,ETHERNET_BUFFER); //read UDP packet
int count = checkACNHeaders(packetBuffer, packetSize);
if (count) {
sacnDMXReceived(packetBuffer, count, c); //process data function
}
}
}
//**************************************************
void Send_To_Led(byte Univnr) {
if (Univnr==1){
for (int i =0 ; i<171 ; i++){
led.setPixelColor(i, VALuniv[(i*3)+1], VALuniv[(i*3+1)+1], VALuniv[(i*3+2)+1]);
}
led.show();
}
}
//**************************************************
void sacnDMXReceived(unsigned char* pbuff, int count, int unicount) {
byte b = pbuff[113]; //DMX Subnet
if ( b == DMX_SUBNET) {
b = pbuff[114]; //DMX Universe
// byte s = pbuff[111]; //sequence
if ( b ==DMX_UNIVERSE) {
if ( pbuff[125] == 0 ) { //start code must be 0
for (int i = 126;i < 126+512; i++){
VALuniv[i-125]=pbuff[i];
}
Univ=1;
Send_To_Led(Univ);
}
}
if ( b == DMX_UNIVERSE+1 ) {
if ( pbuff[125] == 0 ) { //start code must be 0
for (int i = 126;i < 126+512; i++){
VALuniv[i-125]=pbuff[i];
}
Univ=2;
Send_To_Led(Univ);
}
}
if ( b == DMX_UNIVERSE+2 ) {
if ( pbuff[125] == 0 ) { //start code must be 0
for (int i = 126;i < 126+512; i++){
VALuniv[i-125]=pbuff[i];
}
Univ=3;
Send_To_Led(Univ);
}
}
if ( b == DMX_UNIVERSE+3) {
if ( pbuff[125] == 0 ) { //start code must be 0
for (int i = 126;i < 126+512; i++){
VALuniv[i-125]=pbuff[i];
}
Univ=4;
Send_To_Led(Univ);
}
}
}
}
