feat(firmware): IM1281C driver

hardware/firmware/src/main.cpp

@@ -15,6 +15,7 @@
 
 #include "esp_system.h"
 #include "config.h"
+#include "IM1281C.h"
 #include "pins.h"
 
 /* LED State Enum */
@@ -95,6 +96,7 @@ Adafruit_SSD1306 display(128, 64, &Wire, -1);
 
 SmartLed leds(LED_WS2812B, LED_COUNT, LED_PIN, 0, DoubleBuffer);
 MFRC522 rfid(PIN_RC_CS, PIN_RC_RST);
+IM1281C im1281c;
 
 static bool isConnectorPlugged(unsigned int connectorId)
 {
@@ -303,6 +305,42 @@ static void expireAuthWaitIfNeeded()
   }
 }
 
+static void pollIm1281c()
+{
+  static unsigned long s_last_poll_ms = 0;
+  const unsigned long now = millis();
+  if ((now - s_last_poll_ms) < 1000)
+  {
+    return;
+  }
+  s_last_poll_ms = now;
+
+  if (!im1281c.readAll())
+  {
+    Serial.printf("[IM1281C] read failed: A=%u B=%u\n", im1281c.lastAResult(), im1281c.lastBResult());
+    return;
+  }
+
+  const IM1281CAData &a = im1281c.a();
+  const IM1281CBData &b = im1281c.b();
+  Serial.printf("[IM1281C] A: U=%.4fV I=%.4fA P=%.4fW E=%.4fkWh PF=%.3f CO2=%.4fkg T=%.2fC F=%.2fHz\n",
+                a.voltage,
+                a.current,
+                a.power,
+                a.energy,
+                a.powerFactor,
+                a.co2,
+                a.temperature,
+                a.frequency);
+  Serial.printf("[IM1281C] B: U=%.4fV I=%.4fA P=%.4fW E=%.4fkWh PF=%.3f CO2=%.4fkg\n",
+                b.voltage,
+                b.current,
+                b.power,
+                b.energy,
+                b.powerFactor,
+                b.co2);
+}
+
 /* LED Control Functions */
 void updateLED()
 {
@@ -435,8 +473,8 @@ void setup()
   // Initialize I2C for OLED (from schematic pin map)
   Wire.begin(PIN_OLED_SDA, PIN_OLED_SCL);
 
-  // Initialize UART2 for IM1281C (U2)
-  Serial2.begin(BAUD_IM1281C, SERIAL_8N1, PIN_U2RXD, PIN_U2TXD);
+  // Initialize IM1281C over UART2 (default: address 1, 4800bps, 8N1)
+  im1281c.begin(Serial2, PIN_U2RXD, PIN_U2TXD);
 
   // Initialize SPI bus for RC522
   SPI.begin(PIN_RC_SCK, PIN_RC_MISO, PIN_RC_MOSI, PIN_RC_CS);
@@ -773,6 +811,7 @@ void loop()
   stopIfUnplugged();
   pollRfidCard();
   expireAuthWaitIfNeeded();
+  pollIm1281c();
 
   mg_mgr_poll(&mgr, 10);
   mocpp_loop();