ESP32 Forum

ESP_igrr wrote:No, ADC2 is not used for BT. If you don't use WiFi (i.e. don't call esp_wifi_init), you should be able to use ADC2.

That's cool, thanks! Wifi off!

frax84 wrote: For the project i'm working on ADC2 is an important element (i would need a total of 12 ADC channels) and i use BLE to transfer data. I would like to know if ADC2 pins are used for BT control loops or not.

Hi Frax,

I also need to use the ESP32 with more than 6 analog inputs and Bluetooth for my project. Have you in the end managed to get all 12 analog inputs and Bluetooth to work together properly?

Thanks

What is unclear is whether the ADC2 functionality is off-limits when using wifi, or if the GPIO pins where it breaks out are also off limits.

Can I still use GPIO25, for example, as a digital I/O pin, even though its default mapping might be to the ADC2 unit? (My experiments seem to crash my ov7670 camera module when wifi turns on using any of the ADC2 GPIO pins, yet I see other samples for the camera using pins that are normally associated with ADC2.)

If I don't plan to use ADC2, can I remap the pins or what should I do so that they are still available while WiFi is active?

Thanks
Peter

Hi All,

We are planning to use few ADC2 channels as per our project requirement. So, Also, In parallel, We are planning to use BLE in parallel. So, Will it create any impact into ADC2 while using BLE? will it work ADC2 channel while using BLW?

As I have heard like ADC2 can not be used with WIFi and i don't that issue has been fixed into newer SDK or not.

So, Please confirm that so that we can make our product schematic according to that.

Concerning ADC2 support when using WiFi concurrently: Can the affected GPIO pins be used safely as outputs without affecting concurrent WiFi operation?
Peter

If the pins are actually output-capable (GPIO34-39 are not) then you can use them for digital outputs without issue; you can also use any pin as a digital input. Only ADC capability is affected by WiFi.

Excellent .. Thank you. Would it be possible for you to point me to any ESP32 design or architecture documentation that helps me understand this better?

peterl3233 wrote: ↑

Thu Dec 05, 2019 2:54 pm

Excellent .. Thank you. Would it be possible for you to point me to any ESP32 design or architecture documentation that helps me understand this better?

Hello,

You can refer read the docs for ESP-IDF which will help you for same.

Hi,

is the issue with ADC2 and WIFI happening with the ESP32-Mini as well? I can't find anything on the datasheet that says so.

pgonzalez wrote: ↑

Mon Feb 13, 2023 8:45 am

Hi,

is the issue with ADC2 and WIFI happening with the ESP32-Mini as well? I can't find anything on the datasheet that says so.

Hello,

I think there is no any dependencies on Hardware as it is just matter of Stack changes into ESP32 IDF which I believe is included into Latest Stable IDF Still you can confirm with ESP32 IDF Developers.