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  • Greatpeople.me from Kroger offers all the data identified with their work. greatpeople.me is a site related to Kroger inc for its workers to find out about what’s going on at the organization. Every one of the partners of Kroger can have their entrance to this site to think about the work news and updates at Kroger. https://krogerfeedback.ninja/greatpeople-me/
  • Hi....you know how to use an Arduino our Stm32, ESp32 link a telemetry with Lora? Did see you any project like it to build a telemetry 915Mhz with Arduino?
  • 3D Robotics
    Yes, just send an arm command over serial from Arduino using MAVLink. Super easy:
    https://discuss.ardupilot.org/t/mavlink-and-arduino-step-by-step/25566
    MAVLink and Arduino: step by step
    MAVLink and Arduino by Juan Pedro López This is not a post on the details of MAVLink serial protocol. If you are interested on the protocol itself,…
    • I tried combining some code snippets to arm the Pixhawk. However, I am missing something. The code I am running is the code below. Can you please check it and tell me what is wrong? Thanks

      #include <mavlink.h>
      #include <SoftwareSerial.h>
      SoftwareSerial _MavLinkSerial(9, 10); // PIN 9=Telemetry TX->Pixhawk RX, PIN 10=Telemetry RX->Pixhawk TX

      // Mavlink variables
      unsigned long previousMillisMAVLink = 0; // will store last time MAVLink was transmitted and listened
      unsigned long next_interval_MAVLink = 1000; // next interval to count
      const int num_hbs = 60; // # of heartbeats to wait before activating STREAMS from Pixhawk. 60 = one minute.
      int num_hbs_pasados = num_hbs;

      uint8_t target_system=1;// - not really sure why this has to be at a valu of 1
      uint8_t target_component=0;
      uint16_t CMD_LONG_command=0;
      uint8_t CMD_LONG_confirmation=0;
      float CMD_LONG_param1=0;
      float CMD_LONG_param2=0;
      float CMD_LONG_param3=0;
      float CMD_LONG_param4=0;
      float CMD_LONG_param5=0;
      float CMD_LONG_param6=0;
      float CMD_LONG_param7=0;

      //Standard requireemnts for packets to have
      uint8_t system_id = 255;
      uint8_t component_id = 200;


      void setup() {
      // MAVLink interface start
      _MavLinkSerial.begin(57600);

      Serial.begin(57600);
      Serial.println("MAVLink starting.");
      }

      void loop() {

      Command_long_ARM();
      delay(10000);

      Command_long_Disarm();

      // MAVLink
      /* The default UART header for your MCU */
      int sysid = 1; ///< ID 20 for this airplane. 1 PX, 255 ground station
      int compid = 158; ///< The component sending the message
      int type = MAV_TYPE_QUADROTOR; ///< This system is an airplane / fixed wing

      // Define the system type, in this case an airplane -> on-board controller
      // uint8_t system_type = MAV_TYPE_FIXED_WING;
      uint8_t system_type = MAV_TYPE_GENERIC;
      uint8_t autopilot_type = MAV_AUTOPILOT_INVALID;

      uint8_t system_mode = MAV_MODE_PREFLIGHT; ///< Booting up
      uint32_t custom_mode = 0; ///< Custom mode, can be defined by user/adopter
      uint8_t system_state = MAV_STATE_STANDBY; ///< System ready for flight

      // Initialize the required buffers
      mavlink_message_t msg;
      uint8_t buf[MAVLINK_MAX_PACKET_LEN];

      // Pack the message
      //mavlink_msg_heartbeat_pack(sysid,compid, &msg, type, autopilot_type, system_mode, custom_mode, system_state);
      mavlink_msg_heartbeat_pack(1, 0, &msg, type, autopilot_type, system_mode, custom_mode, system_state);

      // Copy the message to the send buffer
      uint16_t len = mavlink_msg_to_send_buffer(buf, &msg);

      // Send the message with the standard UART send function
      // uart0_send might be named differently depending on
      // the individual microcontroller / library in use.
      unsigned long currentMillisMAVLink = millis();
      if (currentMillisMAVLink - previousMillisMAVLink >= next_interval_MAVLink)
      {
      // Record last HB update
      previousMillisMAVLink = currentMillisMAVLink;


      //Mav_Request_Data();
      num_hbs_pasados++;
      if (num_hbs_pasados >= num_hbs) {
      // Request streams from Pixhawk
      Serial.println("Streams requested!");
      Mav_Request_Data();
      num_hbs_pasados = 0;
      }

      }

      // Check reception buffer
      comm_receive();
      }


      void Mav_Request_Data()
      {
      mavlink_message_t msg;
      uint8_t buf[MAVLINK_MAX_PACKET_LEN];


      // To be setup according to the needed information to be requested from the Pixhawk
      const int maxStreams = 1;
      const uint8_t MAVStreams[maxStreams] = {MAV_DATA_STREAM_POSITION};
      const uint16_t MAVRates[maxStreams] = {0x02};

      for (int i = 0; i < maxStreams; i++) {
      mavlink_msg_request_data_stream_pack(6, 200, &msg, 1, 0, MAVStreams[i], MAVRates[i], 1);
      uint16_t len = mavlink_msg_to_send_buffer(buf, &msg);
      _MavLinkSerial.write(buf, len);
      }
      }

      void comm_receive() {
      mavlink_message_t msg;
      mavlink_status_t status;

      while (_MavLinkSerial.available() > 0) {
      uint8_t c = _MavLinkSerial.read();

      // Try to get a new message
      if (mavlink_parse_char(MAVLINK_COMM_0, c, &msg, &status))
      {
      Serial.print("DEBUG msgid:"); Serial.println(msg.msgid);
      // Handle message
      switch (msg.msgid)
      {
      case MAVLINK_MSG_ID_HEARTBEAT: // #0: Heartbeat
      {
      // E.g. read GCS heartbeat and go into
      // comm lost mode if timer times out
      }
      break;

      case MAVLINK_MSG_ID_SET_MODE: {
      // set mode
      }
      break;
      }
      }
      }
      }

      void Command_long_ARM(){

      // Define the system type (see mavlink_types.h for list of possible types)

      // Initialize the required buffers
      mavlink_message_t msg;
      uint8_t buf[MAVLINK_MAX_PACKET_LEN];

      CMD_LONG_param1 = 1;// to arm the damn thing
      CMD_LONG_command=MAV_CMD_COMPONENT_ARM_DISARM;//this is the type of command i.e. disamr/arm


      // Pack the message
      //uint16_t mavlink_msg_command_long_pack(uint8_t system_id, uint8_t component_id, mavlink_message_t* msg,uint8_t target_system, uint8_t target_component, uint16_t command, uint8_t confirmation, float param1, float param2, float param3, float param4, float param5, float param6, float param7)
      mavlink_msg_command_long_pack(system_id,component_id,&msg,target_system,target_component,CMD_LONG_command,CMD_LONG_confirmation,CMD_LONG_param1,CMD_LONG_param2,CMD_LONG_param3,CMD_LONG_param4,CMD_LONG_param5,CMD_LONG_param6,CMD_LONG_param7);
      // Copy the message to send buffer

      /*
      mavlink_command_long_t arm_command_msg;
      mavlink_message_t arm_msg;

      arm_command_msg.command = 40;
      arm_command_msg.target_system = 1;
      arm_command_msg.target_component = 0;
      arm_command_msg.confirmation = 0;
      arm_command_msg.param1 = 1;
      arm_command_msg.param2 = 0;
      arm_command_msg.param3 = 0;
      arm_command_msg.param4 = 0;
      arm_command_msg.param5 = 0;
      arm_command_msg.param6 = 0;
      arm_command_msg.param7 = 0;

      mavlink_msg_command_long_encode(system_id, component_id, &arm_msg, &arm_command_msg);
      */
      uint16_t len = mavlink_msg_to_send_buffer(buf, &msg);

      // Send the message (.write sends as bytes)
      Serial.write(buf, len);


      }
      void Command_long_Disarm(){

      // Define the system type (see mavlink_types.h for list of possible types)

      // Initialize the required buffers
      mavlink_message_t msg;
      uint8_t buf[MAVLINK_MAX_PACKET_LEN];


      CMD_LONG_param1 = 0;// to arm the damn thing
      CMD_LONG_command=MAV_CMD_COMPONENT_ARM_DISARM;//this is the type of command i.e. disarm/arm
      // Pack the message
      //uint16_t mavlink_msg_command_long_pack(uint8_t system_id, uint8_t component_id, mavlink_message_t* msg,uint8_t target_system, uint8_t target_component, uint16_t command, uint8_t confirmation, float param1, float param2, float param3, float param4, float param5, float param6, float param7)
      mavlink_msg_command_long_pack(system_id,component_id,&msg,target_system,target_component,CMD_LONG_command,CMD_LONG_confirmation,CMD_LONG_param1,CMD_LONG_param2,CMD_LONG_param3,CMD_LONG_param4,CMD_LONG_param5,CMD_LONG_param6,CMD_LONG_param7);
      // Copy the message to send buffer

      //int fd = serial_fd;
      //char buf[300];
      /*
      mavlink_command_long_t arm_command_msg;
      mavlink_message_t arm_msg;

      arm_command_msg.command = 40;
      arm_command_msg.target_system = 1;
      arm_command_msg.target_component = 0;
      arm_command_msg.confirmation = 0;
      arm_command_msg.param1 = 0;
      arm_command_msg.param2 = 0;
      arm_command_msg.param3 = 0;
      arm_command_msg.param4 = 0;
      arm_command_msg.param5 = 0;
      arm_command_msg.param6 = 0;
      arm_command_msg.param7 = 0;

      mavlink_msg_command_long_encode(system_id, component_id, &arm_msg, &arm_command_msg);
      */
      uint16_t len = mavlink_msg_to_send_buffer(buf, &msg);

      // Send the message (.write sends as bytes)
      Serial.write(buf, len);

      }
This reply was deleted.

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