This is a demo Ingenuity Micro Nexus client (based on the Netduino example for my RFM9XLoRaNetMF library) that uploads temperature and humidity data to my Azure IoT Hubs/Central or AdaFruit.IO on Raspberry PI field gateways
Bill of materials (Prices June 2019).
- Nexus USD24.95
- Seeedstudio Temperature&Humidity Sensor USD11.50 NZD20
- 5CM 4 Pin buckled cable USD1.90 NZD34.75
// <copyright file="client.cs" company="devMobile Software">
// Copyright ® 2019 Feb devMobile Software, All Rights Reserved
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE"
//
// </copyright>
namespace devMobile.IoT.Nexus.FieldGateway
{
using System;
using System.Text;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using devMobile.IoT.NetMF.ISM;
using devMobile.NetMF.Sensor;
using IngenuityMicro.Nexus;
class NexusClient
{
private Rfm9XDevice rfm9XDevice;
private readonly TimeSpan dueTime = new TimeSpan(0, 0, 15);
private readonly TimeSpan periodTime = new TimeSpan(0, 0, 60);
private readonly SiliconLabsSI7005 sensor = new SiliconLabsSI7005();
private readonly Led _led = new Led();
private readonly byte[] fieldGatewayAddress = Encoding.UTF8.GetBytes("LoRaIoT1");
private readonly byte[] deviceAddress = Encoding.UTF8.GetBytes("Nexus915");
public NexusClient()
{
rfm9XDevice = new Rfm9XDevice(SPI.SPI_module.SPI3, (Cpu.Pin)28, (Cpu.Pin)15, (Cpu.Pin)26);
_led.Set(0, 0, 0);
}
public void Run()
{
rfm9XDevice.Initialise(frequency: 915000000, paBoost: true, rxPayloadCrcOn: true);
rfm9XDevice.Receive(deviceAddress);
rfm9XDevice.OnDataReceived += rfm9XDevice_OnDataReceived;
rfm9XDevice.OnTransmit += rfm9XDevice_OnTransmit;
Timer humidityAndtemperatureUpdates = new Timer(HumidityAndTemperatureTimerProc, null, dueTime, periodTime);
Thread.Sleep(Timeout.Infinite);
}
private void HumidityAndTemperatureTimerProc(object state)
{
_led.Set(0, 128, 0);
double humidity = sensor.Humidity();
double temperature = sensor.Temperature();
Debug.Print(DateTime.UtcNow.ToString("hh:mm:ss") + " H:" + humidity.ToString("F1") + " T:" + temperature.ToString("F1"));
rfm9XDevice.Send(fieldGatewayAddress, Encoding.UTF8.GetBytes("t " + temperature.ToString("F1") + ",H " + humidity.ToString("F0")));
}
void rfm9XDevice_OnTransmit()
{
_led.Set(0, 0, 0);
Debug.Print("Transmit-Done");
}
void rfm9XDevice_OnDataReceived(byte[] address, float packetSnr, int packetRssi, int rssi, byte[] data)
{
try
{
string messageText = new string(UTF8Encoding.UTF8.GetChars(data));
string addressText = new string(UTF8Encoding.UTF8.GetChars(address));
Debug.Print(DateTime.UtcNow.ToString("HH:MM:ss") + "-Rfm9X PacketSnr " + packetSnr.ToString("F1") + " Packet RSSI " + packetRssi + "dBm RSSI " + rssi + "dBm = " + data.Length + " byte message " + @"""" + messageText + @"""");
}
catch (Exception ex)
{
Debug.Print(ex.Message);
}
}
}
}
Overall the development process was good with no modifications to my RFM9X.NetMF library or SI7005 library (bar removing a Netduino I2C work around) required
