56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
#include <Wire.h>
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#define I2C_DEV_ADDR 0x55 // Must match slave
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void setup() {
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Serial.begin(115200);
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Wire.begin(); // default pins for ESP32-C3: SDA=8, SCL=9
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Serial.println("Enter number of pixels:");
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}
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void loop() {
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static int numPixels = 0;
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static bool pixelsSet = false;
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// Step 1: Get number of pixels from user
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if (!pixelsSet && Serial.available()) {
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numPixels = Serial.parseInt();
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if (numPixels > 0 && numPixels <= 100) { // reasonable limit
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Wire.beginTransmission(I2C_DEV_ADDR);
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Wire.write(0x01); // Command: set pixel count
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Wire.write(numPixels);
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Wire.endTransmission();
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pixelsSet = true;
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Serial.println("Enter command: (example: ALL 255 0 0 128) or (PIXEL 3 0 255 0 255)");
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Serial.println("Format:");
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Serial.println("ALL R G B I");
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Serial.println("PIXEL N R G B I");
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} else {
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Serial.println("Invalid pixel count. Try again.");
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}
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}
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// Step 2: Get lighting commands from user
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if (pixelsSet && Serial.available()) {
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String cmd = Serial.readStringUntil('\n');
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cmd.trim();
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if (cmd.startsWith("ALL")) {
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int r, g, b, i;
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sscanf(cmd.c_str(), "ALL %d %d %d %d", &r, &g, &b, &i);
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Wire.beginTransmission(I2C_DEV_ADDR);
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Wire.write(0x02); // Command: set all pixels
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Wire.write(r); Wire.write(g); Wire.write(b); Wire.write(i);
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Wire.endTransmission();
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} else if (cmd.startsWith("PIXEL")) {
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int n, r, g, b, i;
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sscanf(cmd.c_str(), "PIXEL %d %d %d %d %d", &n, &r, &g, &b, &i);
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Wire.beginTransmission(I2C_DEV_ADDR);
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Wire.write(0x03); // Command: set one pixel
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Wire.write(n); Wire.write(r); Wire.write(g); Wire.write(b); Wire.write(i);
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Wire.endTransmission();
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}
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Serial.println("Command sent.");
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}
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}
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