Add IEC62056 parsing, OLED timing, and batch LoRa send

include/config.h

@@ -10,7 +10,8 @@ enum class DeviceRole : uint8_t {
 enum class PayloadType : uint8_t {
   MeterData = 0,
   TestCode = 1,
-  TimeSync = 2
+  TimeSync = 2,
+  MeterBatch = 3
 };
 
 constexpr uint8_t PROTOCOL_VERSION = 1;
@@ -53,6 +54,9 @@ constexpr uint32_t TIME_SYNC_INTERVAL_SEC = 60;
 constexpr uint32_t OLED_PAGE_INTERVAL_MS = 4000;
 constexpr uint32_t OLED_AUTO_OFF_MS = 10UL * 60UL * 1000UL;
 constexpr uint32_t SENDER_OLED_READ_MS = 10000;
+constexpr uint32_t METER_SAMPLE_INTERVAL_MS = 1000;
+constexpr uint32_t METER_SEND_INTERVAL_MS = 30000;
+constexpr uint8_t METER_BATCH_MAX_SAMPLES = 30;
 
 constexpr uint8_t NUM_SENDERS = 1;
 inline constexpr uint16_t EXPECTED_SENDER_IDS[NUM_SENDERS] = {

include/json_codec.h

@@ -5,3 +5,5 @@
 
 bool meterDataToJson(const MeterData &data, String &out_json);
 bool jsonToMeterData(const String &json, MeterData &data);
+bool meterBatchToJson(const MeterData *samples, size_t count, String &out_json);
+bool jsonToMeterBatch(const String &json, MeterData *out_samples, size_t max_count, size_t &out_count);

include/power_manager.h

@@ -7,4 +7,5 @@ void power_sender_init();
 void power_receiver_init();
 void read_battery(MeterData &data);
 uint8_t battery_percent_from_voltage(float voltage_v);
+void light_sleep_ms(uint32_t ms);
 void go_to_deep_sleep(uint32_t seconds);