Get started with Arduino [C3 series]

Requirements

Installing Hardware package

Configure Board

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  • Make C3 boards into Device Firmware Upgrade (DFU) mode.
    • Hold on Button 9
    • Press Button Reset
    • Release Button 9 When you hear the prompt tone on usb reconnection

WIFI

You need set WIFI Tx Power to 8.5dBm to use WIFI.

Use WiFi.setTxPower(WIFI_POWER_8_5dBm) after WiFi.begin() or WiFi.softAP()

WiFi.begin(ssid, password);
WiFi.setTxPower(WIFI_POWER_8_5dBm);
WiFi.softAP(ssid, password);
WiFi.setTxPower(WIFI_POWER_8_5dBm);

simple test:

#include <WiFi.h>

const char* ssid = "yourssid";
const char* password = "yourpasswd";
void setup() {
  Serial.begin(115200);
  delay(1000);

  Serial.println("Connecting...");
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();

  WiFi.begin(ssid, password);

  WiFi.setTxPower(WIFI_POWER_8_5dBm);

  while (WiFi.status() != WL_CONNECTED){
    Serial.print(".");
    delay(500);
  }

  Serial.println("Connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
}

void loop() {
}