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

[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!