private async Task <modemResponse> WaitForResponseAsync(string successMatch, string failMatch)
{
Regex successR = new Regex(successMatch);
Regex errorR = new Regex(failMatch);
modemResponse r = new modemResponse();
try
{
r.responseString = await GetModemResponseAsync();
if (successR.Match(r.responseString).Success)
{
r.responseStatus = aTCommandResponse.ok;
}
else if (errorR.Match(r.responseString).Success)
{
r.responseStatus = aTCommandResponse.error;
}
else
{
r.responseStatus = aTCommandResponse.unknown;
}
return(r);
}
catch (Exception ex)
{
this.log.Error(ex.Message);
this.ViewModel.Status = ex.Message;
throw ex;
}
}
private async Task <bool> OnTickAsync()
{
bool ok = false;
string atComand;
string response;
string ss;
string jsonData;
modemResponse signalStrength = new modemResponse();
int[] signal;
string[] commands =
{
@"AT+CMEE=2",
@"AT+SAPBR=3,1,""CONTYPE"",""GPRS""",
@"AT+SAPBR=3,1,""APN"",""globaldata""", //giffgaff.com
@"AT+SAPBR=2,1", //Query GPRS context
@"AT+SAPBR=1,1", //Open GPRS context
@"AT+SAPBR=2,1", //Query GPRS context
@"AT+HTTPINIT",
@"AT+HTTPSSL=1",
@"AT+HTTPPARA=""CID"",1",
@"AT+HTTPPARA=""URL"", ""https://pflfunctions.azurewebsites.net/api/LevelMeasurement1?code=1PFxb4FHlHKcRWqWM91lPXtgtIJLl/l3F/52V7LFVHyN2gCxQJRApw==&clientId=default""",
@"AT+HTTPPARA=""CONTENT"",""application/json"""
};
try
{
//Get signal strength
atComand = @"AT+CSQ";
await WriteWithLogAsync(atComand);
signalStrength = await WaitForResponseAsync(@".+OK\s{2,}", @".+CME ERROR:\s{2,}"); //Parse for ok: "OK\r\n" and fail: "CME ERROR: operation not allowed\r\n"
//Extract signal strength value
Regex r = new Regex(@"(?:.+\+CSQ:)(\s*[\d]{1,2},[\d]{1,2}).+");
Match match = r.Match(signalStrength.responseString);
ss = match.Groups[1].Value.Trim(); //retrieve dta as "nn,mm" value
signal = ss.Split(',').Select(x => int.Parse(x)).ToArray <int>();
jsonData = $"{{\"SignalStrength\":\"({ss}) {signalStrengthConversion[signal[0]]}\"}}";
foreach (string command in commands)
{
await WriteWithLogAsync(command);
ok = await WaitForResponseAsync();
log.Info("Modem Response to command : " + command + " is " + ok.ToString());
this.ViewModel.Status = "Modem Response to command : " + command + " is " + ok.ToString();
if (!ok)
{
return(false);
}
}
//Set up download
atComand = $"AT+HTTPDATA={jsonData.Length.ToString()},60000"; //Data length is length of json data object, in this case signal strength string
await WriteWithLogAsync(atComand);
ok = await WaitForResponseAsync(@"DOWNLOAD");
//Write data
await WriteWithLogAsync(jsonData); // + "\u001A");
log.Info("Writing data: " + jsonData);
//wait for echo
response = await GetModemResponseAsync();
//POST command
atComand = @"AT+HTTPACTION=1";
await WriteWithLogAsync(atComand);
//check for HTTP OK (200)
ok = await WaitForResponseAsync(@",200,");
log.Info("Modem Response to command : " + atComand + " is " + ok.ToString());
this.ViewModel.Status = "Modem Response to command : " + atComand + " is " + ok.ToString();
//close HTTP session
atComand = @"AT+HTTPTERM";
await WriteWithLogAsync(atComand);
ok = await WaitForResponseAsync();
log.Info("Modem Response to command : " + atComand + " is " + ok.ToString());
this.ViewModel.Status = "Modem Response to command : " + atComand + " is " + ok.ToString();
//Close GPRS context
atComand = @"AT+SAPBR=0,1";
await WriteWithLogAsync(atComand);
ok = await WaitForResponseAsync();
log.Info("Modem Response to command : " + atComand + " is " + ok.ToString());
this.ViewModel.Status = "Modem Response to command : " + atComand + " is " + ok.ToString();
return(true);
}
catch (Exception ex)
{
this.log.Error(ex.Message);
this.ViewModel.Status = ex.Message;
throw ex;
}
}