Download the Ada-remoteFXTrigger_NeoTrellis_FastLED_RX code below and upload it to your controller box.
// SPDX-FileCopyrightText: 2019 Erin St. Blaine for Adafruit Industries
// SPDX-FileCopyrightText: 2019 John Edgar Park for Adafruit Industries
//
// SPDX-License-Identifier: MIT
//
//Ada_remoteFXTrigger_RX_NeoPixel
//Remote Effects Trigger Box Receiver
//by John Park & Erin St Blaine
//for Adafruit Industries
//
// Button box receiver with NeoPixels using FastLED
//
//
//MIT License
#include <FastLED.h>
#if defined(FASTLED_VERSION) && FASTLED_VERSION > 3010001
#error "FastLED 3.10.2 has known compile issues with SAMD boards. Please downgrade to FastLED 3.10.1"
#endif
#define LED_PIN 12
#define NUM_LEDS 20
#define LED_TYPE WS2812B
#define COLOR_ORDER GRB
CRGBArray<NUM_LEDS> leds;
#include <SPI.h>
#include <RH_RF69.h>
#include <Wire.h>
#define LED 13
/********** NeoPixel Setup *************/
#define UPDATES_PER_SECOND 100
CRGBPalette16 currentPalette( CRGB::Black);
CRGBPalette16 targetPalette( PartyColors_p );
TBlendType currentBlending;
int SPEEDO = 25;
int STEPS = 20;
int HUE = 200; // starting color
int SATURATION = 255;
int BRIGHTNESS = 200;
int glitter = 0;
/************ Radio Setup ***************/
// Change to 434.0 or other frequency, must match RX's freq!
#define RF69_FREQ 915.0
#if defined (__AVR_ATmega32U4__) // Feather 32u4 w/Radio
#define RFM69_CS 8
#define RFM69_INT 7
#define RFM69_RST 4
#endif
#if defined(ARDUINO_SAMD_FEATHER_M0) // Feather M0 w/Radio
#define RFM69_CS 8
#define RFM69_INT 3
#define RFM69_RST 4
#endif
#if defined (__AVR_ATmega328P__) // Feather 328P w/wing
#define RFM69_INT 3 //
#define RFM69_CS 4 //
#define RFM69_RST 2 // "A"
#endif
#if defined(ESP32) // ESP32 feather w/wing
#define RFM69_RST 13 // same as LED
#define RFM69_CS 33 // "B"
#define RFM69_INT 27 // "A"
#endif
// Singleton instance of the radio driver
RH_RF69 rf69(RFM69_CS, RFM69_INT);
bool oldState = HIGH;
void setup() {
delay( 3000 ); // power-up safety delay
FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
FastLED.setBrightness( BRIGHTNESS );
pinMode(LED, OUTPUT);
pinMode(RFM69_RST, OUTPUT);
digitalWrite(RFM69_RST, LOW);
Serial.println("Feather RFM69 RX/TX Test!");
// manual reset
digitalWrite(RFM69_RST, HIGH);
delay(10);
digitalWrite(RFM69_RST, LOW);
delay(10);
if (!rf69.init()) {
Serial.println("RFM69 radio init failed");
while (1);
}
Serial.println("RFM69 radio init OK!");
// Defaults after init are 434.0MHz, modulation GFSK_Rb250Fd250, +13dbM (for low power module)
// No encryption
if (!rf69.setFrequency(RF69_FREQ)) {
Serial.println("setFrequency failed");
}
// If you are using a high power RF69 eg RFM69HW, you *must* set a Tx power with the
// ishighpowermodule flag set like this:
rf69.setTxPower(14, true);
// The encryption key has to be the same as the one in the server
uint8_t key[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
rf69.setEncryptionKey(key);
pinMode(LED, OUTPUT);
Serial.print("RFM69 radio @"); Serial.print((int)RF69_FREQ); Serial.println(" MHz");
delay(500);
Gradient(); //So the lights come un upon startup, even if the trigger box is off
}
void loop(){
if (rf69.waitAvailableTimeout(1000)) {
// Should be a message for us now
uint8_t buf[RH_RF69_MAX_MESSAGE_LEN];
uint8_t len = sizeof(buf);
if (! rf69.recv(buf, &len)) {
Serial.println("Receive failed");
return;
}
//digitalWrite(LED, HIGH);
//rf69.printBuffer("Received: ", buf, len);
//buf[len] = 0;
//Serial.print("Got: "); Serial.println((char*)buf);
//Serial.print("RSSI: "); Serial.println(rf69.lastRssi(), DEC);
char radiopacket[20] = "Button #";//prep reply message to send
if (buf[0]=='A'){ //the letter sent from the button
ledMode(0);
radiopacket[8] = 'A';
}
else if (buf[0]=='B'){ //the letter sent from the button
ledMode(1);
radiopacket[8] = 'B';
}
else if (buf[0]=='C'){ //the letter sent from the button
ledMode(2);
radiopacket[8] = 'C';
}
else if (buf[0]=='D'){ //the letter sent from the button
ledMode(3);
radiopacket[8] = 'D';
}
else if (buf[0]=='E'){ //the letter sent from the button
ledMode(4);
radiopacket[8] = 'E';
}
else if (buf[0]=='F'){ //the letter sent from the button
ledMode(5);
radiopacket[8] = 'F';
}
else if (buf[0]=='G'){ //the letter sent from the button
ledMode(6);
radiopacket[8] = 'G';
}
else if (buf[0]=='H'){ //the letter sent from the button
ledMode(7);
radiopacket[8] = 'H';
}
else if (buf[0]=='I'){ //the letter sent from the button
ledMode(8);
radiopacket[8] = 'I';
}
else if (buf[0]=='J'){ //the letter sent from the button
ledMode(9);
radiopacket[8] = 'J';
}
else if (buf[0]=='K'){ //the letter sent from the button
ledMode(10);
radiopacket[8] = 'K';
}
else if (buf[0]=='L'){ //the letter sent from the button
ledMode(11);
radiopacket[8] = 'L';
}
else if (buf[0]=='M'){ //the letter sent from the button
ledMode(12);
radiopacket[8] = 'M';
}
else if (buf[0]=='N'){ //the letter sent from the button
ledMode(13);
radiopacket[8] = 'N';
}
else if (buf[0]=='O'){ //the letter sent from the button
ledMode(14);
radiopacket[8] = 'O';
}
else if (buf[0]=='P'){ //the letter sent from the button
ledMode(15);
radiopacket[8] = 'P';
}
else if (buf[0]=='Q'){ //the letter sent from the button
ledMode(16);
radiopacket[8] = 'Q';
}
else if (buf[0]=='R'){ //the letter sent from the button
ledMode(17);
radiopacket[8] = 'R';
}
else if (buf[0]=='S'){ //the letter sent from the button
ledMode(18);
radiopacket[8] = 'S';
}
else if (buf[0]=='T'){ //the letter sent from the button
ledMode(19);
radiopacket[8] = 'T';
}
else if (buf[0]=='Z'){ //the letter sent from the button
ledMode(20);
radiopacket[8] = 'Z';
}
/* radiopacket[9] = 0;
Serial.print("Sending "); Serial.println(radiopacket);
rf69.send((uint8_t *)radiopacket, strlen(radiopacket));
rf69.waitPacketSent(); */
digitalWrite(LED, LOW);
}
}
void ledMode(int i) {
switch(i){
case 0: HUE=0; SATURATION=255; BRIGHTNESS=200; Solid(); // red
break;
case 1: HUE=40; SATURATION=255; BRIGHTNESS=200; Solid(); // gold
break;
case 2: HUE=100; SATURATION=255; BRIGHTNESS=200; Solid(); // green
break;
case 3: HUE=140; SATURATION=255; BRIGHTNESS=200; Solid(); // Blue
break;
case 4: HUE=180; SATURATION=255; BRIGHTNESS=200; Solid(); // purple
break;
case 5: HUE=220; SATURATION=255; BRIGHTNESS=200; Solid(); // pink
break;
case 6: HUE=0; SATURATION=0; BRIGHTNESS=200; Solid(); // white
break;
case 7: HUE=0; BRIGHTNESS=0; Solid(); // off
break;
case 8: HUE=0; SATURATION=255; BRIGHTNESS=200; Gradient(); // red
break;
case 9: HUE=40; SATURATION=255; BRIGHTNESS=200; Gradient(); // gold
break;
case 10: HUE=100; SATURATION=255; BRIGHTNESS=200; Gradient(); // green
break;
case 11: HUE=140; SATURATION=255; BRIGHTNESS=200; Gradient(); // blue
break;
case 12:HUE=180; SATURATION=255; BRIGHTNESS=200; Gradient(); // purple
break;
case 13:HUE=220; SATURATION=255; BRIGHTNESS=200; Gradient(); // pink
break;
case 14:HUE=160; SATURATION=50; BRIGHTNESS=200; Gradient(); // white
break;
case 15:SATURATION=255; BRIGHTNESS=200; Rainbow_Fade(); // rainbow fade
break;
case 16:STEPS=4; SATURATION=255; BRIGHTNESS=200; Rainbow(); //rainbow 2
break;
case 17:STEPS=20; BRIGHTNESS=200; SATURATION=255; Rainbow(); // rainbow 3
break;
case 20:BRIGHTNESS=200;
break;
}
}
// GRADIENT --------------------------------------------------------------
void Gradient()
{
SetupGradientPalette();
static uint8_t startIndex = 0;
startIndex = startIndex + 1; // motion speed
FillLEDsFromPaletteColors( startIndex);
FastLED.show();
FastLED.delay(SPEEDO);
}
// SOLID ----------------------------------------------------
void Solid()
{
fill_solid(leds, NUM_LEDS, CHSV(HUE, SATURATION, BRIGHTNESS));
FastLED.show();
delay(20);
}
// RAINBOW --------------------------------------------------
void Rainbow()
{
FastLED.setBrightness( BRIGHTNESS );
currentPalette = RainbowColors_p;
static uint8_t startIndex = 0;
startIndex = startIndex + 1;
FillLEDsFromPaletteColors( startIndex);
FastLED.show();
FastLED.delay(SPEEDO);
}
// RAINBOW FADE --------------------------------------------------
void Rainbow_Fade() { //-m2-FADE ALL LEDS THROUGH HSV RAINBOW
HUE++;
if (HUE > 255) {HUE = 0;}
for(int idex = 0 ; idex < NUM_LEDS; idex++ ) {
leds[idex] = CHSV(HUE, SATURATION, BRIGHTNESS);
}
LEDS.show();
delay(SPEEDO);
}
void SetupGradientPalette()
{
CRGB light = CHSV( HUE + 25, SATURATION - 20, BRIGHTNESS);
CRGB dark = CHSV( HUE, SATURATION - 15, BRIGHTNESS);
CRGB medium = CHSV ( HUE - 25, SATURATION, BRIGHTNESS);
currentPalette = CRGBPalette16(
light, light, light, light,
medium, medium, medium, medium,
dark, dark, dark, dark,
medium, medium, medium, medium );
}
void FillLEDsFromPaletteColors( uint8_t colorIndex)
{
uint8_t brightness = BRIGHTNESS;
for( int i = 0; i < NUM_LEDS; i++) {
leds[i] = ColorFromPalette( currentPalette, colorIndex, brightness, currentBlending);
colorIndex += STEPS;
}
}
Customizing
This code allows you to tell the LEDs what to do when the command is received from the control box. This example code matches the TX code in a number of ways. There are 21 different letters set up that can be received and each letter triggers a different LED mode.
A Note about Animations
FastLED is wonderful at producing buttery smooth animations. However, this setup works much better with very little LED motion or solid colors. Every time the signal is sent from the controller box, the animation is interrupted for just a moment. If we didn't interrupt the animation then most of your button presses would be missed while the animation was busy running, making it seem the controller box was not working or that the commands weren't being received. So I've made simple animations and solids the focus of this tutorial. For example, the Rainbow_Fade() animation does fade through the rainbow but it does it very slowly due to being interrupted so much.
There are two sections of code to pay attention to. Look for this section:
if (buf[0]=='A'){ //the letter sent from the button
ledMode(0);
radiopacket[8] = 'A';
}
else if (buf[0]=='B'){ //the letter sent from the button
ledMode(1);
radiopacket[8] = 'B';
}
The radio packet being sent (A or B in this case) will cause the ledMode to change.
Further down, you'll find:
void ledMode(int i) {
switch(i){
case 0: HUE=0; SATURATION=255; BRIGHTNESS=200; Solid(); // red
break;
case 1: HUE=40; SATURATION=255; BRIGHTNESS=200; Solid(); // gold
break;
These are the different modes being triggered by each radio packet. Here is where you can change what happens on the LED strip when button 0 is pressed, sending A, and triggering LED mode 0.
Page last edited January 22, 2025
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