Added Frequency reading. Also install new libraryies in README.md

.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

README.md

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+# Libraries:
+SoftwareSerial (pio lib install 7212)

src/main.cpp

@@ -1,11 +1,90 @@
 #include <Arduino.h>
+#include <SoftwareSerial.h>
 
+SoftwareSerial ft817 = SoftwareSerial(2, 3);
 
+String getMode(uint8_t byte);
+unsigned long bcdtoi(uint8_t bcd);
 
 void setup() {
   // put your setup code here, to run once:
+  ft817.begin(9600);
+  Serial.begin(9600);
 }
 
 void loop() {
   // put your main code here, to run repeatedly:
+  uint8_t bytes[] = {0x00,0x00,0x00,0x00,0x03};
+
+  for (unsigned int i = 0; i < sizeof(bytes); i++){
+    ft817.write(bytes[i]);
+    Serial.print(String(bytes[i]));
+    delay(1);
+  }
+  Serial.println();
+  uint8_t buffer[5];
+  ft817.readBytes(&buffer[0], sizeof(buffer));
+
+  String mode = getMode(buffer[4]);
+
+  //int freq = getFreq(buffer[0], buffer[1], buffer[2], buffer[3]);
+  /*char buf[10];
+  for(int i = 0; i<4; i++) {
+    snprintf(buf, sizeof(buf), "%x ", buffer[i]);
+    Serial.print(buf);
+  }*/
+
+  //Serial.println();
+  unsigned long actualFrequency = 0;
+  actualFrequency = bcdtoi(buffer[0]) * 1000000;
+  actualFrequency += (bcdtoi(buffer[1]) * 10000);
+  actualFrequency += (bcdtoi(buffer[2]) * 100);
+  actualFrequency += bcdtoi(buffer[3]);
+
+  
+  Serial.print(actualFrequency);
+
+  Serial.write(0x20);
+  Serial.println(mode);
+
+  delay(2000);
+  //String freq = Serial.readString();
+  
+
+}
+
+String getMode(uint8_t byte){
+  switch (byte)
+  {
+  case 0x00:
+    return "LSB";
+    break;
+  case 0x01:
+    return "USB";
+    break;
+  case 0x02:
+    return "CW";
+  case 0x03:
+    return "CWR";
+  case 0x04:
+    return "AM";
+  case 0x06:
+    return "WFM";
+  case 0x08:
+    return "FM";
+  case 0x0A:
+    return "DIG";
+  case 0x0C:
+    return "PKT";
+  default:
+    return "IDENTIFICATION FAILURE";
+    break;
+  }
+}
+
+unsigned long bcdtoi(uint8_t bcd){
+  int byte = (bcd & 0xF0) >> 4;
+  byte *= 10;
+  byte += bcd & 0x0F;
+  return byte;
 }