ESP32-C6 Firmware Update Guide

Hardware Preparation

• USB-to-TTL tool
• Jumper wires

Software Preparation

• FLASH Download Tool
• Factory default firmware or custom firmware

Hardware Connection

It is recommended to use male jumper wires for the ESP32-C6 side. If male jumper wires are not available, you can insert jumper wires into pin headers to make a simple programming tool.

Operation Steps

1. Connect the hardware according to the wiring diagram, then connect the TTL tool to the computer.
2. Open Flashdown Tool and select the main control model and download mode.
   
3. Configure the firmware, COM port and other settings, erase the ESP32-C6 flash, then program the firmware to the ESP32-C6.
   
4. Test the functions with the following code.

/*
 *  This sketch sends a message to a TCP server
 *
 */

#include <WiFi.h>
#include <WiFiMulti.h>

WiFiMulti WiFiMulti;

void setup() {
  Serial.begin(115200);
  delay(10);

  // We start by connecting to a WiFi network
  WiFiMulti.addAP("SSID", "passpasspass");

  Serial.println();
  Serial.println();
  Serial.print("Waiting for WiFi... ");

  while (WiFiMulti.run() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());

  delay(500);
}

void loop() {
  //    const uint16_t port = 80;
  //    const char * host = "192.168.1.1"; // ip or dns
  const uint16_t port = 1337;
  const char *host = "192.168.1.10";  // ip or dns

  Serial.print("Connecting to ");
  Serial.println(host);

  // Use NetworkClient class to create TCP connections
  NetworkClient client;

  if (!client.connect(host, port)) {
    Serial.println("Connection failed.");
    Serial.println("Waiting 5 seconds before retrying...");
    delay(5000);
    return;
  }

  // This will send a request to the server
  //uncomment this line to send an arbitrary string to the server
  //client.print("Send this data to the server");
  //uncomment this line to send a basic document request to the server
  client.print("GET /index.html HTTP/1.1\n\n");

  int maxloops = 0;

  //wait for the server's reply to become available
  while (!client.available() && maxloops < 1000) {
    maxloops++;
    delay(1);  //delay 1 msec
  }
  if (client.available() > 0) {
    //read back one line from the server
    String line = client.readStringUntil('\r');
    Serial.println(line);
  } else {
    Serial.println("client.available() timed out ");
  }

  Serial.println("Closing connection.");
  client.stop();

  Serial.println("Waiting 5 seconds before restarting...");
  delay(5000);
}

Others

• Introduction to Test Points of FireBeetle 2 ESP32-P4.
  
• Firmware source code project address: https://github.com/espressif/esp-hosted-mcu/tree/main/slave