Error during compilation

Gateways [obsolete] SCPF
1

Hello,
This is my first attempt at getting a LoRaWan gateway and node to work

The gateway is a single channel gateway based on the code from
github/things4u/ESP-1ch-Gateway written by Maarten Westenberg.
I am using an esp32 and a rfm95w radio.

I am using the arduino ide for building the project.

When buiding the project I get and error shown below:

Compiling sketch…
.
.
/home/jrm/Documents/test/ESP-sc-gway/_txRx.ino: In function ‘int buildPacket(uint8_t*, LoraUp*, bool)’:
_txRx:266:42: error: ‘checkMic’ was not declared in this scope
checkMic(message, messageLength, NwkSKey);
^
I tried searching for the checkMic routine but couldn’t find it.
Also, there are no #include files in the _txRx.ino file.

Anyone have an idea of why this could be happening?
Its kind of puzzling because the #if statement looks like this:

#if _CHECK_MIC==1
unsigned char NwkSKey[16] = _NWKSKEY;
checkMic(message, messageLength, NwkSKey);
#endif //_CHECK_MIC

and I don’t even know how _CHECK_MIC is known in the file
since there are no #include files.

Thanks for your help

2

Single channel packet forwarders harm the LoRaWAN network and are incompatible. They’re not supported on TTN and should not be used,
This forum does not provide support for them.

3

Maybe it’s not a single channel packet forwarder then. It’s a single channel gateway that doesn’t harm anything that I know. The library used is the arduino-lmic by matt. Maybe I just posted in the wrong section.

4

There is noch thing as a single channel gateway. The LoRaWAN specification requires a gateway to have multiple channels. The hardware usually used has 8.
And a module with just one channel will hurt the network.

5

Unfortunately its not a case of what you dont know does not cause any harm.

6

So why have a section for single channel gateways in the forum ?

7

Because 4 years ago it seemed a good idea, now we know about the issued caused by them.

8

Ok, thanks