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Topic: LoRa RFM95 (Read 409 times) previous topic - next topic

srnet

By the way I think my arduino IS able to deliver 3.3V
Its not able to deal (correctly) with 3.3V logic levels, why do you think you were advised to use a logic level converter ?

When I started in microprocessor design back in 1979, most everything was 5V logic (or -5V & +12V but thats another story) and life was a lot easier.
$50SAT is now Silent (but probably still running)
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jremington

Quote
but on my last topic I've been told I HAD to use these logic converters even with this arduino
Correct, if you insist on using a 5V Arduino (despite the fact that it has a 3.3V POWER output).

Staren

Sorry for the late answer I didn't see there was a second page on my topic.
I still don't have any 3.3V board but I'll try again with the 5V and the logical converters until I manage to make the chip work / until I receive my 3.3V board
I'll try with the first chip though, I don't want to break the second and I still don't know if I broke the first

Staren

So until now with both RFM95 when I plug the logical converters the eror is:
FF
Init failed
Sending to the server


And when I remove the logical converter ( from the chip I'm supposed to have broken ) I get the qame error but with a 0 replacing the FF

I guess it's the same with the brand new one but since the error changes I guess my first chip isn't broken
I checked and FF means 255 in decimal so maybe my chip's sending a full byte of data then init fails I don't know why

srnet

I checked and FF means 255 in decimal so maybe my chip's sending a full byte of data
More likely the LoRa device is not responding at all, and 0xFF is caused by a MOSI pin that has nothing connected to it on the other side of the logic level converter.
$50SAT is now Silent (but probably still running)
http://www.50dollarsat.info/
http://www.loratracker.uk/

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