i'm using obd2 connector pins( melting 14/6 for canh nd canl 5/4 for chassis/signal ground ) and i want to communicate a car obd2 with esp32 twai protocale do i need a can transceiver or i just wire obd2 pins into esp32 gpio directly i tried wiring directly but failed to receive data ( my code may b...

i m using obd2 can pins (6 /14)to communicate to my car i tried installing nd starting twai driver i transmiting data but recieving always fails how to transmite obd data correctly? why i can't recieve data ? resultat : Driver installed Driver started Message queued for transmission Failed to receiv...

#include <stdio.h> #include<string.h> #include<stdlib.h> #include "soc/uart_struct.h" #include"freertos/FreeRTOS.h" #include"freertos/task.h" #include"esp_system.h" #include"esp_log.h" #include"driver/gpio.h" #include"driver/uart.h" #include "driver/i2c.h" #include <sys/unistd.h> #include <sys/stat....