Hi guys, quite new to platform.io and to the community, so I hope this is the right place to ask.
I’m working on ESP32 nano board, using VSCode and PIO extension.
I encounter significant performance issues with analogRead.
I have minimized the code sample to the following:
#include <WiFi.h>
const char* ssid = "your_SSID"; // Replace with your WiFi SSID
const char* password = "your_PASSWORD"; // Replace with your WiFi password
void setup() {
Serial.begin(115200);
pinMode(13, INPUT);
// Turn on WiFi
Serial.println("Connecting to WiFi...");
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.println("\nWiFi Connected!");
}
void loop() {
unsigned long startTime = micros(); // Use micros() for better precision
int vv = analogRead(13);
unsigned long elapsedTime = micros() - startTime;
Serial.print("ADC Value: ");
Serial.print(vv);
Serial.print(" | ADC Time: ");
Serial.print(elapsedTime);
Serial.println(" us");
}
In a simple sketch using arduino IDE the performance I observe is about 1-2 micro seconds.
In my pio project, I encounter approximately 6500 micro seconds (x6500!!).
- I have removed all libraries from my project and copy-pasted the exact same code in my main.cpp file
- my board version (in board manager):
- my platformio.ini file:
[env:main-unit]
platform = espressif32
board = arduino_nano_esp32
framework = arduino
platform_packages =
framework-arduinoespressif32
upload_flags =
--serial=DCDA0C22E848 ;
count_tasks_for_parallel_build = 40
monitor_speed = 115200
build_type = release
build_flags =
-D CONFIG_ASYNC_TCP_MAX_ACK_TIME=5000 ; (keep default)
-D CONFIG_ASYNC_TCP_PRIORITY=10 ; (keep default)
-D CONFIG_ASYNC_TCP_QUEUE_SIZE=64 ; (keep default)
-D CONFIG_ASYNC_TCP_RUNNING_CORE=1 ; force async_tcp task to be on same core as Arduino app (default is any core)
-D CONFIG_ASYNC_TCP_STACK_SIZE=4096 ; reduce the stack size (default is 16K)
; -D CORE_DEBUG_LEVEL=5
; -g3
; -ggdb
lib_compat_mode = strict
lib_ldf_mode = chain
I’d be more than happy to get your inputs as it seems I miss something significant here.
Thanks for the guidance!
