Move AP credentials to config and clarify STA UI access

README.md

@@ -249,13 +249,14 @@ inline constexpr uint16_t EXPECTED_SENDER_IDS[NUM_SENDERS] = { 0xF19C };
 - Uses deep sleep between cycles (`SENDER_WAKE_INTERVAL_SEC`).
 
 ## Web UI
-- AP SSID: `DD3-Bridge-<short_id>`
-- AP password: `changeme123`
+- AP SSID: `DD3-Bridge-<short_id>` (prefix configurable)
+- AP password: `changeme123` (configurable)
 - Endpoints:
   - `/`: status overview
   - `/wifi`: WiFi/MQTT/NTP config (AP and STA)
   - `/sender/<device_id>`: per-sender details
 - Sender IDs on `/` are clickable (open sender page in a new tab).
+- In STA mode, the UI is also available via the board’s IP/hostname on your WiFi network.
 
 ## MQTT
 - Topic: `smartmeter/<deviceId>/state`

include/config.h

@@ -78,6 +78,8 @@ constexpr bool SERIAL_DEBUG_DUMP_JSON = false;
 constexpr bool LORA_SEND_BYPASS = false;
 constexpr bool ENABLE_SD_LOGGING = false;
 constexpr uint8_t PIN_SD_CS = 25;
+constexpr const char *AP_SSID_PREFIX = "DD3-Bridge-";
+constexpr const char *AP_PASSWORD = "changeme123";
 
 constexpr uint8_t NUM_SENDERS = 1;
 inline constexpr uint16_t EXPECTED_SENDER_IDS[NUM_SENDERS] = {

src/main.cpp

@@ -642,8 +642,8 @@ void setup() {
     } else {
       g_ap_mode = true;
       char ap_ssid[32];
-      snprintf(ap_ssid, sizeof(ap_ssid), "DD3-Bridge-%04X", g_short_id);
-      wifi_start_ap(ap_ssid, "changeme123");
+      snprintf(ap_ssid, sizeof(ap_ssid), "%s%04X", AP_SSID_PREFIX, g_short_id);
+      wifi_start_ap(ap_ssid, AP_PASSWORD);
       if (g_cfg.ntp_server_1.isEmpty()) {
         g_cfg.ntp_server_1 = "pool.ntp.org";
       }