ESP32 ADC not working

[simisv]

Hi

On Wroom module ADC1 is safe with WiFi and Bluetooth,
I'm guessing is the same with S3 module , not sure yet .
Definitely after some tests I will know ( but first I need to build the prototype board).
Anyway, on this project is not used.
Thanks

[Xbiotec]

I'm on customer side in Asia and i'm trying to use on ESP32-u4wdh Pin20 AN36 on (Flowcode Strange notation) who on ESP32 is Pin20 GPIO13 on ADC2_Ch4, not on same Channel as others.
Why Pin name are different ?

for information, I'm using ESP32-u4wdh since long time

ESP32 pin20.png (13.4 KiB) Viewed 783 times

It's not possible to adjust channel in component properties.
- ESP32 reboot

UART1 Started, [0;31mE (2419) adc_oneshot: adc_oneshot_config_channel(150): invalid channel[0m
14:27:27.245 -> ESP_ERROR_CHECK failed: esp_err_t 0x102 (ESP_ERR_INVALID_ARG) at 0x400d80a9
14:27:27.279 -> file: "C:\ProgramData\MatrixTSL\FlowcodeV10\CAL\ESP\ESP_CAL_ADC.c" line 109
14:27:27.285 -> func: FC_CAL_ADC_Enable_1
14:27:27.285 -> expression: adc_oneshot_config_channel(adc_handle, Channel, &config)
14:27:27.285 ->
14:27:27.285 -> abort() was called at PC 0x40086c1b on core 0

It's not a question of delay in main loop.

I have remove everything on my program to check if the problem is not linked to another component.
Same problem

I ahev test all ADC components to see if there is at least one where we could change the Channel.
No way

I'm not using WIFI nether Bluetooth

Program attached
ESP32-u4wdh datasheet attached


So I think it's ADC component problem or ADC cal problem , I don't know
Please find a way asap to be able to use ADC

As I said I'm on customer side and for me it's 15h27 !
thx

[medelec35]

Hello Seb.
You don't need to use WiFi components, its just wifi is enabled by default.
THe reason being is more people use ESP32 for WiFi than they do for ADC.
Therefore if you use any ADC's that are ADC2 which is most, then they will cause a reset.
Have you tried just using ADC that are on inputs only at least then that will free up other pins for I/O or O/P tasks.
For example you can try An0, An3, An4, An5, An6 or An7?

[Xbiotec]

Hello Martin,
I can not use another ADC, PCB already made. (20 PCBA)
You mean in flowcode, WiFi is enable by default?
So how to disable and solve this ADC problem?

[Xbiotec]

Hello,
Nothing to tell me?

[mnfisher]

Can you try the code on page 1 of this topic - check the output from UART (using PuTTY or similar) - it will let you know if the pin is available etc?

Martin

[Xbiotec]

Hi, the pin is available for ADC but on ADC2 channel4 , I'm sure, I have asked to Espressif, they said , no mistake on datasheet.
The problem is because ADC components in flowcode do not manage ADC2 Channel 4.
download/file.php?id=9356

[mnfisher]

The code I posted on the previous page doesn't use the component - and should work correctly - however, it will take a bit of re-work in your code.

[Xbiotec]

ok I will try

But Flowcode team must check and make it working on all ADC on FC10 for ESP32

[Xbiotec]

The code I posted on the previous page doesn't use the component - and should work correctly - however, it will take a bit of re-work in your code.

Thx it's works after few modifications and AI help