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Poller.cs
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Poller.cs
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using System.IO.Ports;
using System.Text.Json;
using System.Text.Json.Serialization;
using Microsoft.Extensions.Options;
using Must.Modbus;
using Must.Models;
namespace Must;
public class Poller
{
private readonly Config _config;
private readonly ILogger<Poller> _logger;
public Poller(IOptions<Config> config, ILogger<Poller> logger)
{
_config = config.Value;
_logger = logger;
}
public string GetJSON()
{
try
{
using var port = new SerialPort(_config.PortName, 19200, Parity.None, 8, StopBits.One);
port.Handshake = Handshake.None;
port.DtrEnable = false;
port.RtsEnable = false;
port.ReadTimeout = 1500;
_logger.LogInformation($"Opening port {port}");
port.Open();
var wrapper = new SerialPortWrapper(
port, d => { },
d => { }
);
var reader = new ModbusReader(wrapper);
ushort[] values;
EP1800 model = new();
values = ReadValues(reader, port, 4, 10001, 8);
SensorToModelMapper.Map(10001, values, model);
values = ReadValues(reader, port, 4, 10103, 10);
SensorToModelMapper.Map(10103, values, model);
values = ReadValues(reader, port, 4, 15201, 21);
SensorToModelMapper.Map(15201, values, model);
values = ReadValues(reader, port, 4, 20000, 17);
SensorToModelMapper.Map(20000, values, model);
values = ReadValues(reader, port, 4, 20101, 43);
SensorToModelMapper.Map(20101, values, model);
values = ReadValues(reader, port, 4, 25201, 79);
SensorToModelMapper.Map(25201, values, model);
var json = JsonSerializer.Serialize<EP1800>(model, new JsonSerializerOptions()
{
DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
WriteIndented = true,
});
_logger.LogInformation("======");
_logger.LogInformation(json);
port.Close();
return json;
}
catch (Exception ex)
{
_logger.LogInformation("Error {message}", ex.Message);
throw;
}
}
private static ushort[] ReadValues(ModbusReader reader, SerialPort port, byte deviceId, ushort address, ushort count)
{
port.DiscardInBuffer();
port.DiscardOutBuffer();
double timeout = (1.0f / (double)port.BaudRate * 1000.0 * 12.0 * count * 2.0) + (count * 2) + 5.0 + 1000.0;
port.ReadTimeout = (int)timeout;
return reader.Read(deviceId, address, count);
}
}