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A comment on Liberating Wi-Fi on the ESP32 [video]. Parent comment

Re:Liberating Wi-Fi on the ESP32 [video] by mystified5016 on Friday December 27, 2024 @10:37PM (#42528358)
To chime in, adding the espressif WiFi libraries to your firmware adds 500-600KB of code. In the trivial IoT widget I just made, the firmware is >90% espressif code by weight.

The RAM use is also... noticeable. It takes quite a lot for this chip do WiFi.

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Re:Liberating Wi-Fi on the ESP32 [video] by vbezhenar on Saturday December 28, 2024 @04:11AM (#42529661)
It is similar for BLE. I recently wrote firmware for nrf52 device. Proprietary blob was 100 KB. My code was 60 KB and actually like 40-50 KB was caused by crypto library which is basically required part of BLE stack as well, just distributed with code and not in the blob.
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Re:Liberating Wi-Fi on the ESP32 [video] by zazaulola on Saturday December 28, 2024 @04:26AM (#42529724)
ESP32 has 18 ADC input channels. But if you are using Wifi, you can only use 8 of the 18 for ADC conversion: GPIO pins 32-39.

Other 10 pins, on which ADC2 channels are possible, can only accept pulse data if you are using Wifi.

This is probably due to firmware limitations.

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Re:Liberating Wi-Fi on the ESP32 [video] by mystified5016 on Saturday December 28, 2024 @03:57PM (#42534661)
Espressif implies that the WiFi hardware uses ADC2 for something. It sounds like a hardware limitation, a firmware issue would have been patched a long time ago.
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