Cannot program in 30pin esp32

[MalfMalf12]

I changed the radio out from pin 17 to pin 19 that is the board miso but it's still saying no cd. Could somebody help me?

[NullString1]

Hi, try leaving the RADIO_OUT disconnected, only connecting GROUND, CLOCK(SCK/CDC CLOCK) and RADIO_IN (MOSI). Check the pinout for your board to see which pins CLOCK and MOSI are. For GROUND I recommend connecting to the metal body of the radio instead of the GROUND pin as I had a problem with that I suspect to be caused by a ground loop.

[turenabo]

Could this be because the radio output voltage is 5V?

[MalfMalf12]

I think it started working, it says no cd instead of no cd changer. Do I need to change something in the code to simulate a cd?

[NullString1]

If it says no cd you need to press the cd button on the radio again to switch to cd changer mode. As for the logic voltage levels I've had no issue personally but I did face power related issues previously. Anywhere between 2-5v should be seen as a 1 so 3.3v should be fine but may also cause the undefined behaviour. Is the voltage to your esp32 low, and is the ground connected to the radio metal casing?

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