I want to use a static IP, but there is a problem with DHCP mode operation

Connectivity WiFi
1

const uint8_t IP_ADDRESS_ARRAY = {192, 168, 35, 222};
const uint8_t NETMASK_ARRAY = {255, 255, 255, 0};
const uint8_t GATEWAY_ADDRESS_ARRAY = {192, 168, 35, 1};
const uint8_t DNS1_ADDRESS_ARRAY = {210, 220, 163, 82}; // 1차 DNS
const uint8_t DNS2_ADDRESS_ARRAY = {168, 126, 63, 1}; // 2차 DNS

SYSTEM_MODE(MANUAL); // OS 제어권 확보 (필수)

void setup() {
// 1. 초기화 및 자격 증명 설정
WiFi.disconnect();
WiFi.clearCredentials();
WiFi.setCredentials(ssid, pass);

// 2. 고정 IP 강제 설정 (connect() 직전)
WiFi.setConfig(NetworkInterfaceConfig()
    .source(NetworkInterfaceConfigSource::STATIC)      
    .address(IP_ADDRESS_ARRAY, NETMASK_ARRAY)         
    .gateway(SockAddr(GATEWAY_ADDRESS_ARRAY))         
    .dns(SockAddr(DNS1_ADDRESS_ARRAY))
    .dns(SockAddr(DNS2_ADDRESS_ARRAY)));

// 3. 연결 시작
Serial.println("Attempting Static IP connection...");
WiFi.connect(); 

// 4. 연결 후 IP 확인 (고정 IP가 나와야 함)
if (waitFor(WiFi.ready, 20000)) {
    Serial.print("Final IP: ");
    Serial.println(WiFi.localIP());
} else {
    Serial.println("Connection failed.");
}

}

I want to use a static IP, but I'm having trouble with DHCP mode.

I flashed the above code to my Photon2, and it's running in DHCP mode.
(I also flashed it in DFU mode, and it still runs in DHCP.)

How can I assign a static IP?

Thank you for your help.

2

The problem is that you need to specify the profile name, which is your SSID, in the configuration or it won't take effect.

WiFi.setConfig(NetworkInterfaceConfig()
    .profile(SSID_NAME)
    .source(NetworkInterfaceConfigSource::STATIC)      
    .address(IP_ADDRESS_ARRAY, NETMASK_ARRAY)         
    .gateway(SockAddr(GATEWAY_ADDRESS_ARRAY))         
    .dns(SockAddr(DNS1_ADDRESS_ARRAY))
    .dns(SockAddr(DNS2_ADDRESS_ARRAY)));
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