AssertionError
Stefan213 opened this issue · comments
My project has worked 4 months ago, but i haven't used it since. I am now using a PCB and when i execute the test_lora.py programm i get following error:
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FAIL: test_mode (main.TestSX127x)
Traceback (most recent call last):
File "test_lora.py", line 43, in wrapper
func(self)
File "test_lora.py", line 62, in test_mode
self.assertEqual(lora.get_mode(), m)
AssertionError: 128 != 129
Thank you in advance.
The assertion tests whether the chip is indeed in the state it should be in. When that is not the case usually there is a SPI communication problem.
Do you know how to pin down the problem?
Back to basics: Directly use Wiring-Pi (I assume it's a rasp) and write, then read, some register, e.g. the mode register.
I tested this and everything works. I also tested the transceiver with an Arduino and it worked perfectly fine. On the Raspberry it still does not work.
If i run rx_cont there are no errors but i dont receive any packets.
I don't really know how to debug this for you remotely. I can only repeat what I already said: Ignore the library for the moment and try to establish communication on the Raspberry using the simplest setup possible.
I checked the SPI Communications with an Oscilloscope and everything was as it should be.
Have they maybe brought out a new chip version? (What Raspberry are you using anyway? I'm sitting on a collection of Rasp 2s and 3s. Rasp 4 isn't that appealing to me so I don't even have one.)
It doesn't seem like there is a new version. I am using a Raspberry 3B+.
I actually ran into similar issue the other day. Thought that the module itself is faulty, but connecting a new one to RPi and running the test, I got the same assertion error. However, this doesn't cause any issues with creating a communication link between two modules -- so in your case, maybe the problem lies somewhere else as well?
I finally found the error. I was testing another transceiver and it worked, so i took a closer look on the other one and the crystal oscillator was missing. I wonder why it was missing.
Thank you for your support, i am very happy that i finally can close this issue.