Initial commit

include/config.h

@@ -0,0 +1,58 @@
+#pragma once
+
+#include <Arduino.h>
+
+enum class DeviceRole : uint8_t {
+  Sender = 0,
+  Receiver = 1
+};
+
+enum class PayloadType : uint8_t {
+  MeterData = 0,
+  TestCode = 1,
+  TimeSync = 2
+};
+
+constexpr uint8_t PROTOCOL_VERSION = 1;
+
+// Pin definitions
+constexpr uint8_t PIN_LORA_SCK = 5;
+constexpr uint8_t PIN_LORA_MISO = 19;
+constexpr uint8_t PIN_LORA_MOSI = 27;
+constexpr uint8_t PIN_LORA_NSS = 18;
+constexpr uint8_t PIN_LORA_RST = 23;
+constexpr uint8_t PIN_LORA_DIO0 = 26;
+
+constexpr uint8_t PIN_OLED_SDA = 21;
+constexpr uint8_t PIN_OLED_SCL = 22;
+constexpr uint8_t PIN_OLED_RST = 16;
+constexpr uint8_t OLED_I2C_ADDR = 0x3C;
+constexpr uint8_t OLED_WIDTH = 128;
+constexpr uint8_t OLED_HEIGHT = 64;
+
+constexpr uint8_t PIN_BAT_ADC = 35;
+
+constexpr uint8_t PIN_ROLE = 13;
+constexpr uint8_t PIN_OLED_CTRL = 14;
+
+constexpr uint8_t PIN_METER_RX = 34;
+
+// LoRa settings
+constexpr long LORA_FREQUENCY = 433E6;
+constexpr uint8_t LORA_SPREADING_FACTOR = 12;
+constexpr long LORA_BANDWIDTH = 125E3;
+constexpr uint8_t LORA_CODING_RATE = 5;
+constexpr uint8_t LORA_SYNC_WORD = 0x34;
+
+// Timing
+constexpr uint32_t SENDER_WAKE_INTERVAL_SEC = 30;
+constexpr uint32_t TIME_SYNC_INTERVAL_SEC = 60;
+constexpr uint32_t OLED_PAGE_INTERVAL_MS = 10000;
+constexpr uint32_t OLED_AUTO_OFF_MS = 10UL * 60UL * 1000UL;
+
+constexpr uint8_t NUM_SENDERS = 1;
+inline constexpr uint16_t EXPECTED_SENDER_IDS[NUM_SENDERS] = {
+  0xF19C
+};
+
+DeviceRole detect_role();