John Mickey
Published © MIT

Elephant edge

ML Models using edge impulse and STM32L475 MCU board

BeginnerFull instructions providedOver 3 days644
Elephant edge

Things used in this project

Hardware components

USB-A to Micro-USB Cable
USB-A to Micro-USB Cable
×1
stm32 discover kit
×1

Software apps and online services

Avnet Things
Avnet Things
USED TO Create the dashboard
Edge Impulse Studio
Edge Impulse Studio

Story

Read more

Schematics

IOT connect dashboard

This is where you monitor the movement of an asset from device data

Code

Adding device to Avnet

C#
using IOTConnectSDK;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Newtonsoft.Json;

namespace IOTConnect_SDK_Sample
{
    class Program
    {
        static SDKClient client;
        static void Main(string[] args)
        {
            //Get your ENV and CPID from the portal key vaults module or visit https://help.iotconnect.io SDK section.
            string cpId = "14cf4939849c4183ac5c74660ca9ab27", uniqueId = "elephantedge1", env = "Avnet";

            if (string.IsNullOrWhiteSpace(cpId))
            {
                Console.WriteLine("cpId can not be blank.");
                return;
            }

            if (string.IsNullOrWhiteSpace(uniqueId))
            {
                Console.WriteLine("uniqueId can not be blank.");
                return;
            }

            //Initialize device sdk client to connect device. 
            client = new SDKClient(cpId, uniqueId, DeviceCallback, TwinUpdateCallBack, env);

            //Prepare device data with valid format.[Type1]
            var deviceData = "[{\"uniqueId\":\"<deviceUniqueId>\",\"time\":\"2020-02-14T12:18:23.5499042Z\",\"d\":[{\"humidity\":13}]}]";

            //Send data to device using SendData method.
            client.SendData(deviceData);

            Console.ReadLine();
        }

        private static Task TwinUpdateCallBack(Dictionary<string, object> arg)
        {
            //TODO : TwinUpdateCallBack
            //NOTE: To update twin using sdk method
            //client.UpdateTwin("twinName", "value");
            return Task.CompletedTask;
        }

        private static Task DeviceCallback(string message)
        {
            /* Received command format for DeviceCommand from IOTConnect.Net SDK version < 2.0 */
            //{"cpId":"<cpid>","guid":"00000000-0000-0000-0000-000000000000","uniqueId":"<deviceUniqueId>","command":"<Command> Command_Text","value":null,"ack":true,"ackId":"00000000-0000-0000-0000-000000000000"}

            /* Received command format for Firmware/OTA update from IOTConnect.Net SDK version < 2.0 */
            //{"cpId":"<cpid>","guid":"00000000-0000-0000-0000-000000000000","uniqueId":"<deviceUniqueId>","command":"<Command> OTA_Update_Url","value":null,"ack":false,"ackId":"00000000-0000-0000-0000-000000000000"}

            /* Received command format for DeviceCommand from IOTConnect.Net SDK version 2.0 */
            //{"cpId":"<cpid>","guid":"00000000-0000-0000-0000-000000000000","uniqueId":"<deviceUniqueId>","command":"<Command> Command_Text","value":null,"ack":true,"ackId":"00000000-0000-0000-0000-000000000000","cmdType": "0x01"}

            /* Received command format for Firmware/OTA update from IOTConnect.Net SDK version 2.0 */
            //{"cpId":"<cpid>","guid":"00000000-0000-0000-0000-000000000000","uniqueId":"<deviceUniqueId>","command":"<Command>","value":null,"ack":false,"ackId":"00000000-0000-0000-0000-000000000000","cmdType": "0x02","urls": [{"url": "<URL1>"}, {"url": "<URL2>"}]}


            //"mt" = 5 - DeviceCommandAck, 11 - OtaAck/FirmwareUpgradeAck
            //"st" = 4 - Failed, 6 - ExecutedAck[DeviceCommandAck], 7 - Success[OtaAck/FirmwareUpgradeAck]
            try
            {
                var commandData = JsonConvert.DeserializeObject<CommandData>(message);

                DeviceAckModel ackDetails = new DeviceAckModel()
                {
                    AckId = commandData.AcknowledgeId,
                    ChildId = ""
                };

                //IOTConnect.Net SDK version < 2.0
                bool isOta = (commandData != null && !string.IsNullOrWhiteSpace(commandData.Command) && commandData.Command.StartsWith("<CommandPrefix> ", StringComparison.CurrentCultureIgnoreCase));

                //IOTConnect.Net SDK version >= 2.0
                isOta = commandData.CommandType.Equals("0x02", StringComparison.CurrentCultureIgnoreCase);

                if (isOta)
                {
                    //TODO : download and save ota file from url [commandData.Command]
                    ackDetails.Msg = "OTA updated successfully.";
                    ackDetails.Status = 7;
                }
                else
                {
                    ackDetails.Msg = "Device command received successfully.";
                    ackDetails.Status = 6;
                }

                var dataOta = JsonConvert.SerializeObject(ackDetails);

                //NOTE: SendAck method have different arguments as per the SDK version. Choose accordingly.
                //IOTConnect.Net SDK version < 2.0
                //client.SendAck(dataOta, isOta ? 11 : 5);

                //IOTConnect.Net SDK version >= 2.0
                client.SendAck(dataOta, "2020-02-14T12:19:33.7769262Z", isOta ? 11 : 5);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

            return Task.CompletedTask;
        }
    }

    public class DeviceAckModel
    {
        [JsonProperty("ackId")]
        public string AckId { get; set; }
        [JsonProperty("st")]
        public int Status { get; set; }
        [JsonProperty("msg")]
        public string Msg { get; set; }
        [JsonProperty("childId")]
        public string ChildId { get; set; }
    }

    public class CommandData
    {
        [JsonProperty("cpId")]
        public string CpId { get; set; }

        [JsonProperty("guid")]
        public string Guid { get; set; } //Device Guid

        [JsonProperty("uniqueId")]
        public string UniqueId { get; set; } //Device unique id

        [JsonProperty("command")]
        public string Command { get; set; }

        [JsonProperty("value")]
        public string Value { get; set; }

        [JsonProperty("ack")]
        public bool Acknowledge { get; set; }

        [JsonProperty("ackId")]
        public string AcknowledgeId { get; set; }

        [JsonProperty("cmdType")]
        public string CommandType { get; set; }

        [JsonProperty("urls")]
        public object Urls { get; set; }
    }
}

Credits

John Mickey

John Mickey

1 project • 1 follower

Comments