Your checksums look fine to me. I found an nmea checksum calculator online and checked a few. I just hook it to the USB converters, no Arduino on the boat. The only difficulty I have had is with getting the settings saved by auto config to work, and problems saving things on USB tab. Don't need USB tab, cut out middle man, use the port Linux assigns the USB adapter.
I had trouble with my nasamarine unit flooding. Their support was helpful and sent me a new circuit board and a different gasket at a reasonable price. I used silicone and sealed the thing up tight and it has been fine since. I hope they have improved their product.
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Nevermind what I said about checksums.
I don't know why you get such varied results from different USB adapters.
Ftdi are supposed to be better than Prolific.
If you had consistent failures I would say take it up with nasamarine. If checksums are wrong it isn't conforming to standard and it should. Their support is said to be better than their quality.
Another thing, when my circuit board was wet I had strangeness too, until it corroded out and stopped working.
Sent from my Moto G (5) Plus using Tapatalk
I had trouble with my nasamarine unit flooding. Their support was helpful and sent me a new circuit board and a different gasket at a reasonable price. I used silicone and sealed the thing up tight and it has been fine since. I hope they have improved their product.
Sent from my Moto G (5) Plus using Tapatalk
Nevermind what I said about checksums.
I don't know why you get such varied results from different USB adapters.
Ftdi are supposed to be better than Prolific.
If you had consistent failures I would say take it up with nasamarine. If checksums are wrong it isn't conforming to standard and it should. Their support is said to be better than their quality.
Another thing, when my circuit board was wet I had strangeness too, until it corroded out and stopped working.
Sent from my Moto G (5) Plus using Tapatalk