RAK3272S - I2C Use

LPWAN Modules / EVBs RAK3172
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HI, I’m very new in all of these. I’, actually developing a custom board for my mechatronics degree and I already designed the board using the RAK3172, but I changue my mind and I want to use the RAK3272S for easy install in the board.
My question is, using the RAK3272S still need the resistors (4.7k ohms) in I2C to use that pins? I already read the guide for the design in KiCAD, but I don’t know if apply in the RAK3272S. I think that yes, but for me is better ask!

Additionally, I want to know if thew RAKDAP1 is enough for flash my own firmware on the board?

Thx for the answers!

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Welcome to RAK forum @FabioTiz ,

To answers your questions:

  1. Yes. You need the pull-up 4.7k resistors on the I2C pins.
  2. You can use RAKDAP1 but without it, you can still use any USB-UART converter and connect to UART2 to upload your custom firmware.
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Thx a lot!
I have a several questions about my PCB designs and layouts, Can you take a look on them and advice me? Please.

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Yes @FabioTiz ,

I am looking at the schematic and layout now. I will reply on the email support.

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Thank you, Carl! You’re my savior, you’ll be in the acknowledgments of my thesis!

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