Please help! Arduino UNO + RFM69HW (TSM:INIT:TSP FAIL)

[mfalkvidd]

@vladimir yes, either replace with a 3.3V board or use a level converter.

[vladimir]

@mfalkvidd I'm not properly connected? In the photo above. He's turned over there.

[gohan]

That is the voltage regulator like the one on the arduino that supplies the 3.3v pin, but the Arduino is using 5v also on the other GPIO pins and that usually could kill the RFM69 that should operate at 3.5V max on data pins

[vladimir]

@gohan what regulator can you advise? Can you show an example?

[gohan]

search for "logic level shifter"

[mfalkvidd]

@vladimir the shopping guide at https://www.mysensors.org/build/connect_radio lists a logic level shifter.

[vladimir]

@gohan thank you very much for your help! :raised_hands:

[vladimir]

@mfalkvidd thank you very much for your help! :+1: :v:

[gohan]

I hope you didn't fry the rfm69, so in case you are still having problems with the level shifter connected try with another module

[vladimir]

@gohan I'm afraid that they suffered greatly during my experiments. I'll try with the new ones. Can you tell me how to connect the converter?

[mfalkvidd]

https://learn.sparkfun.com/tutorials/bi-directional-logic-level-converter-hookup-guide and https://learn.adafruit.com/neopixel-levelshifter/shifting-levels are pretty extensive guides

[vladimir]

@mfalkvidd Thank you! I hope I can figure it out. To regret, my knowledge of English is not very great. As I understand it, the connection scheme will be the most similar to this:

I'm right?

[mfalkvidd]

@vladimir yes, that looks great (except for the brown cable that doesn't go through the level shifter)

[vladimir]

@mfalkvidd So I do not like the converter for 4 channels?
Here this is indicated by the link you gave me above

It will take 5? More precisely 8-channel version?

[mfalkvidd]

@vladimir you will need to shift all signals. You can use multiple 4x boards, or a bigger board.

Edit: maybe miso and dio0 don't need to be shifted, since the Arduino only reads from it. But I am not 100% sure.

[vladimir]

@mfalkvidd Thank you! :raised_hands: I'll try tomorrow.

[gohan]

4ch is enough as the brown cable is the interrupt signal so it's just an input on the arduino

[vladimir]

@gohan @mfalkvidd Tell me please, can I connect the converter like this? If not, please explain why.

Let me remind you, in the example was like this:

[gohan]

No you can't, because 3.3v are needed to power the level shifter and the radio module. Level shifter is not a voltage regulator.

[vladimir]

@gohan Thanks for clarifying!