private async Task <bool> DetermineIfFramecounterIsFromNewlyStartedDeviceAsync(LoRaDevice loRaDevice, uint payloadFcnt, ILoRaDeviceFrameCounterUpdateStrategy frameCounterStrategy)
{
var isFrameCounterFromNewlyStartedDevice = false;
if (payloadFcnt <= 1)
{
if (loRaDevice.IsABP)
{
if (loRaDevice.IsABPRelaxedFrameCounter && loRaDevice.FCntUp >= 0 && payloadFcnt <= 1)
{
// known problem when device restarts, starts fcnt from zero
// We need to await this reset to avoid races on the server with deduplication and
// fcnt down calculations
await frameCounterStrategy.ResetAsync(loRaDevice, payloadFcnt, this.configuration.GatewayID);
isFrameCounterFromNewlyStartedDevice = true;
}
}
else if (loRaDevice.FCntUp == payloadFcnt && payloadFcnt == 0)
{
// Some devices start with frame count 0
isFrameCounterFromNewlyStartedDevice = true;
}
}
return(isFrameCounterFromNewlyStartedDevice);
}
private static bool DetermineIfFramecounterIsFromNewlyStartedDevice(LoRaDevice loRaDevice, uint payloadFcnt, ILoRaDeviceFrameCounterUpdateStrategy frameCounterStrategy)
{
var isFrameCounterFromNewlyStartedDevice = false;
if (payloadFcnt <= 1)
{
if (loRaDevice.IsABP)
{
if (loRaDevice.IsABPRelaxedFrameCounter && loRaDevice.FCntUp >= 0 && payloadFcnt <= 1)
{
// known problem when device restarts, starts fcnt from zero
_ = frameCounterStrategy.ResetAsync(loRaDevice);
isFrameCounterFromNewlyStartedDevice = true;
}
}
else if (loRaDevice.FCntUp == payloadFcnt && payloadFcnt == 0)
{
// Some devices start with frame count 0
isFrameCounterFromNewlyStartedDevice = true;
}
}
return(isFrameCounterFromNewlyStartedDevice);
}