powerpods/main/proto/esp_now_messages.proto

syntax = "proto3";

import "nanopb.proto";

package alox;

enum EspNowMessageType {
  ESPNOW_UNKNOWN = 0;
  ESPNOW_DISCOVER = 1;
  ESPNOW_SLAVE_INFO = 2;
  ESPNOW_HEARTBEAT = 3;
  ESPNOW_SET_ACCEL_DEADZONE = 4;
  ESPNOW_UNICAST_TEST = 5;
  ESPNOW_OTA_START = 6;
  ESPNOW_OTA_PAYLOAD = 7;
  ESPNOW_OTA_END = 8;
  ESPNOW_OTA_STATUS = 9;
  ESPNOW_FIND_ME = 10;
  ESPNOW_RESTART = 11;
  ESPNOW_ACCEL_SAMPLE = 12;
  ESPNOW_SET_ACCEL_STREAM = 13;
  ESPNOW_LED_RING = 14;
  ESPNOW_BATTERY_QUERY = 15;
  ESPNOW_BATTERY_REPORT = 16;
  ESPNOW_SET_TAP_NOTIFY = 17;
  ESPNOW_TAP_EVENT = 18;
  ESPNOW_ECHO_PING = 19;
  ESPNOW_ECHO_PONG = 20;
}

message EspNowUnicastTest {
  uint32 seq = 1;
}

/** Master → slave: echo ping (host ts + master monotonic time for RTT). */
message EspNowEchoPing {
  uint64 host_timestamp_us = 1;
  /** esp_timer_get_time() (µs since boot) when master forwarded this message. */
  uint64 master_time_us = 2;
}

/** Slave → master: echo ping payload unchanged. */
message EspNowEchoPong {
  uint64 host_timestamp_us = 1;
  uint64 master_time_us = 2;
}

/** Master → slave: locate pod (LED ring R/G/B ×3 @ full brightness). */
message EspNowFindMe {
  /** 0 = any slave; otherwise only slave_id must match */
  uint32 client_id = 1;
}

/** Master → slave: reboot after short delay. */
message EspNowRestart {
  uint32 client_id = 1;
}

message EspNowDiscover {
  uint32 network = 1;
  /** Master is in an OTA session (UART upload or ESP-NOW distribution). */
  bool master_ota_pending = 2;
}

message EspNowSlavePresence {
  uint32 network = 1;
  bytes mac = 2;
  uint32 version = 3;
  uint32 slave_id = 4;
  bool available = 5;
  bool used = 6;
}

message EspNowAccelDeadzone {
  uint32 deadzone = 1;
  uint32 client_id = 2; // 0 = all slaves; otherwise only matching slave_id applies
}

/** Master → slave: enable/disable periodic accel ESP-NOW stream (~16 ms). */
message EspNowAccelStream {
  bool enable = 1;
  uint32 client_id = 2;
}

/** Slave → master: latest BMA456 sample (sent ~every 16 ms). */
message EspNowAccelSample {
  uint32 slave_id = 1;
  sint32 x = 2;
  sint32 y = 3;
  sint32 z = 4;
}

/** Master → slave: on-demand LiPo read (optional; slaves also push every ~30 s). */
message EspNowBatteryQuery {
  uint32 client_id = 1;
}

/** Master → slave: which tap kinds should be reported via ESP-NOW. */
message EspNowTapNotify {
  uint32 client_id = 1;
  bool single = 2;
  bool double_tap = 3;
  bool triple = 4;
}

/** Slave → master: tap detected on BMA456 (event, not periodic). */
message EspNowTapEvent {
  uint32 slave_id = 1;
  /** 1=single, 2=double, 3=triple */
  uint32 kind = 2;
}

/** Slave → master: LiPo voltages (periodic ~30 s and on query). */
message EspNowBatteryReport {
  uint32 client_id = 1;
  bool lipo1_valid = 2;
  bool lipo2_valid = 3;
  uint32 lipo1_mv = 4;
  uint32 lipo2_mv = 5;
}

/** Master → slave: LED ring command (same modes as UART LedRingProgressRequest). */
message EspNowLedRing {
  uint32 client_id = 1;
  uint32 mode = 2;
  uint32 progress = 3;
  uint32 digit = 4;
  uint32 r = 5;
  uint32 g = 6;
  uint32 b = 7;
  uint32 intensity = 8;
  uint32 blink_ms = 9;
  uint32 blink_count = 10;
}

// Master → slave: begin OTA (erase inactive slot; slave replies ESPNOW_OTA_STATUS).
message EspNowOtaStart {
  uint32 total_size = 1;
}

// Master → slave: firmware chunk (up to 200 bytes); slave buffers 4 KiB before flash write.
message EspNowOtaPayload {
  uint32 seq = 1;
  bytes data = 2 [(nanopb).max_size = 200];
}

// Master → slave: finalize OTA (flush, esp_ota_end, set boot partition).
message EspNowOtaEnd {}

// Slave → master: status / block ACK (same status codes as UART OtaStatusPayload).
message EspNowOtaStatus {
  uint32 status = 1;
  uint32 bytes_written = 2;
  uint32 error = 3;
}

message EspNowMessage {
  EspNowMessageType type = 1;
  oneof payload {
    EspNowDiscover discover = 2;
    EspNowSlavePresence slave_info = 3;
    EspNowSlavePresence heartbeat = 4;
    EspNowAccelDeadzone accel_deadzone = 5;
    EspNowUnicastTest unicast_test = 6;
    EspNowOtaStart ota_start = 7;
    EspNowOtaPayload ota_payload = 8;
    EspNowOtaEnd ota_end = 9;
    EspNowOtaStatus ota_status = 10;
    EspNowFindMe find_me = 11;
    EspNowRestart restart = 12;
    EspNowAccelSample accel_sample = 13;
    EspNowAccelStream accel_stream = 14;
    EspNowLedRing led_ring = 15;
    EspNowBatteryQuery battery_query = 16;
    EspNowBatteryReport battery_report = 17;
    EspNowTapNotify tap_notify = 18;
    EspNowTapEvent tap_event = 19;
    EspNowEchoPing echo_ping = 20;
    EspNowEchoPong echo_pong = 21;
  }
}