433-json-transmitter.ino

#include <Arduino.h>
// same version as dronebot 433 video
#include <RH_ASK.h>
#include <SPI.h>

RH_ASK rf_driver;

void setup() {
  rf_driver.init();
  Serial.begin(9600);
}

void loop() {
  if (Serial.available()) {                // check for incoming serial data
    String command = Serial.readString();  // read command from serial port

    if (command.indexOf("open") > -1) {
      Serial.println("Sending 'open'");
      String commandStr = "{\"command\": \"open\"}";
      static char *msg = commandStr.c_str();
      rf_driver.send((uint8_t *)msg, strlen(msg));
      rf_driver.waitPacketSent();
    } else if (command.indexOf("shut") > -1) {
      Serial.println("Sending 'shut'");
      String commandStr = "{\"command\": \"shut\"}";
      static char *msg = commandStr.c_str();
      rf_driver.send((uint8_t *)msg, strlen(msg));
      rf_driver.waitPacketSent();
    } else {
      Serial.print("Received unknown serial command:");
      Serial.println(command);
    }
  }
}