Serial RGBDigit

#define BUF_SIZE 64

char simHubMessageBuf[BUF_SIZE];

RGBDigit rgbDigit(1, <your-pin-here>);
char gear = '-';

void setup() {
  Serial.begin(115200);

  memset(simHubMessageBuf, 0x0, BUF_SIZE);
  
  // set up rgbdigit
  rgbDigit.begin();
  rgbDigit.clearAll();
}

void loop() {
  if (Serial.available() > 0) {
    Serial.readBytesUntil('{', simHubMessageBuf, BUF_SIZE);
    int readCount = Serial.readBytesUntil('}', simHubMessageBuf, BUF_SIZE);
    simHubMessageBuf[min(readCount, BUF_SIZE - 1)] = 0x0;
    processMessage();
    memset(simHubMessageBuf, 0x0, BUF_SIZE);
  }
  
  rgbDigit.setDigit(gear, 0, 255, 255, 255);
}

void processMessage() {
  char msgType = simHubMessageBuf[0];

  switch (msgType) {
    case 'G':
      gear = simHubMessageBuf[1];
      break;
  }
}