Home Assistant

template:
  - sensor:
      - name: P1 Net Power L1 Signed
        unique_id: p1_net_power_l1_signed
        unit_of_measurement: "W"
        device_class: power
        state_class: measurement
        state: >
          {% set p = states('sensor.p1_power_l1') | float(0) %}
          {% set v = states('sensor.p1_voltage_l1') | float(0) %}
          {% set i = states('sensor.p1_current_l1') | float(0) %}
          {% if p > 0 %}
            {{ p }}
          {% else %}
            {{ -1 * (v * i) | round(1) }}
          {% endif %}

      - name: P1 Net Power L2 Signed
        unique_id: p1_net_power_l2_signed
        unit_of_measurement: "W"
        device_class: power
        state_class: measurement
        state: >
          {% set p = states('sensor.p1_power_l2') | float(0) %}
          {% set v = states('sensor.p1_voltage_l2') | float(0) %}
          {% set i = states('sensor.p1_current_l2') | float(0) %}
          {% if p > 0 %}
            {{ p }}
          {% else %}
            {{ -1 * (v * i) | round(1) }}
          {% endif %}

      - name: P1 Net Power L3 Signed
        unique_id: p1_net_power_l3_signed
        unit_of_measurement: "W"
        device_class: power
        state_class: measurement
        state: >
          {% set p = states('sensor.p1_power_l3') | float(0) %}
          {% set v = states('sensor.p1_voltage_l3') | float(0) %}
          {% set i = states('sensor.p1_current_l3') | float(0) %}
          {% if p > 0 %}
            {{ p }}
          {% else %}
            {{ -1 * (v * i) | round(1) }}
          {% endif %}

      - name: P1 Net Power Total Signed
        unique_id: p1_net_power_total_signed
        unit_of_measurement: "W"
        device_class: power
        state_class: measurement
        state: >
          {{
            states('sensor.p1_net_power_l1_signed') | float(0) +
            states('sensor.p1_net_power_l2_signed') | float(0) +
            states('sensor.p1_net_power_l3_signed') | float(0)
          }}

    while (mySerial.available() && length < sizeof(buffer)) {
      int byteRead = mySerial.read();
      if (byteRead == -1) {
        Serial.println("[UART ERROR] Could not read a byte from mySerial!");
        break;
      }
      if (length < sizeof(buffer)) {
        buffer[length++] = (uint8_t)byteRead;
      } else {
        Serial.println("[BUFFER WARNING] Buffer limit reached, data is being ignored!");
        break;
      }
    }

    // Print full packet to Serial Monitor
    for (uint16_t i = 0; i < length; i++) {
      Serial.print((char)buffer[i]); // Print als text
    }
    Serial.println();

    // Relay packet to Module B
    for (uint16_t i = 0; i < length; i++) {
      mySerial.write(buffer[i]);
    }

    lastSendTime = millis();
  }

for (uint16_t i = 0; i < length; i++) {
      mySerial.write(buffer[i]);
    }