🛠️ RTT‑Inside Mesh Node — Minimal Reference Implementation (Pseudo‑Code)

Core loop • Sensing • Resonance math • Mesh routing • Safety logic#

//////////////////////////////////////////////////////////////
//  RTT-INSIDE MESH NODE — MINIMAL FIRMWARE PSEUDO-CODE
//  Purpose: underground resonance-aware sensing + mesh comms
//////////////////////////////////////////////////////////////

// --- CONSTANTS --------------------------------------------------------------

CONST BEACON_INTERVAL_MS      = 5000
CONST TELEMETRY_INTERVAL_MS   = 15000
CONST ALERT_RETRY_COUNT       = 3
CONST MAX_NEIGHBORS           = 16

// Thresholds (tunable per mine)
CONST VIB_THRESHOLD_WARN      = 0.65
CONST VIB_THRESHOLD_CRIT      = 0.85
CONST GAS_THRESHOLD_WARN      = 0.9
CONST GAS_THRESHOLD_CRIT      = 1.2
CONST STRESS_THRESHOLD_WARN   = 0.6
CONST STRESS_THRESHOLD_CRIT   = 0.8

// --- STATE ------------------------------------------------------------------

node_id
zone_id
neighbor_table[MAX_NEIGHBORS]

last_beacon_time
last_telemetry_time

local_vibration
local_gas
local_stress
clarity_score
drift_vector

// --- INITIALIZATION ---------------------------------------------------------

function init():
    radio.init()
    sensors.init()          // vibration, gas, pressure, temp
    timers.start()
    neighbor_table.clear()
    compute_initial_resonance()
    log("Node boot complete.")

// --- MAIN LOOP --------------------------------------------------------------

function loop():
    now = timers.now()

    // 1. Sense environment
    read_sensors()

    // 2. Compute resonance metrics
    compute_resonance()

    // 3. Check for safety conditions
    if detect_alert_condition():
        broadcast_alert()

    // 4. Periodic beacon (for mesh health)
    if now - last_beacon_time > BEACON_INTERVAL_MS:
        send_beacon()
        last_beacon_time = now

    // 5. Periodic telemetry
    if now - last_telemetry_time > TELEMETRY_INTERVAL_MS:
        send_telemetry()
        last_telemetry_time = now

    // 6. Process incoming packets
    while radio.has_packet():
        pkt = radio.receive()
        handle_packet(pkt)

    sleep(50)   // low-power idle

// --- SENSOR READING ---------------------------------------------------------

function read_sensors():
    local_vibration = sensors.vibration.read()
    local_gas       = sensors.gas.read()
    local_stress    = sensors.pressure.read()   // proxy for roof load

// --- RESONANCE COMPUTATION --------------------------------------------------

function compute_resonance():
    // Normalize values 0–1
    vib_norm   = normalize(local_vibration)
    gas_norm   = normalize(local_gas)
    stress_norm= normalize(local_stress)

    // S-N-R model (simplified)
    signal = weighted_avg(vib_norm, stress_norm)
    noise  = random_variation(vib_norm, stress_norm)
    resonance = signal - noise

    // Clarity score (0–255)
    clarity_score = clamp(resonance * 255, 0, 255)

    // Drift vector (direction of change)
    drift_vector = compute_drift(vib_norm, gas_norm, stress_norm)

// --- ALERT DETECTION --------------------------------------------------------

function detect_alert_condition():
    if vib_norm > VIB_THRESHOLD_CRIT:
        return true
    if gas_norm > GAS_THRESHOLD_CRIT:
        return true
    if stress_norm > STRESS_THRESHOLD_CRIT:
        return true
    return false

// --- PACKET FORMATION -------------------------------------------------------

function build_packet(type, payload):
    pkt.version = 1
    pkt.msg_type = type
    pkt.src_id = node_id
    pkt.zone_id = zone_id
    pkt.seq = next_seq()
    pkt.ttl = 8

    // Resonance block
    pkt.clarity_score = clarity_score
    pkt.stress_hint   = stress_norm * 255
    pkt.vib_hash      = hash(local_vibration)
    pkt.gas_type      = GAS_METHANE
    pkt.gas_level     = gas_norm * 255
    pkt.drift_vector  = drift_vector

    pkt.payload = payload
    pkt.crc = crc16(pkt)

    return pkt

// --- BEACON -----------------------------------------------------------------

function send_beacon():
    pkt = build_packet("BEACON", null)
    radio.send(pkt)

// --- TELEMETRY --------------------------------------------------------------

function send_telemetry():
    payload = {
        "vibration": local_vibration,
        "gas": local_gas,
        "stress": local_stress
    }
    pkt = build_packet("TELEMETRY", payload)
    radio.send(pkt)

// --- ALERT BROADCAST --------------------------------------------------------

function broadcast_alert():
    payload = {
        "alert": "CRITICAL_CONDITION",
        "vibration": local_vibration,
        "gas": local_gas,
        "stress": local_stress
    }
    pkt = build_packet("ALERT", payload)

    for i in 1..ALERT_RETRY_COUNT:
        radio.send(pkt)
        sleep(100)

// --- PACKET HANDLING --------------------------------------------------------

function handle_packet(pkt):
    if pkt.msg_type == "BEACON":
        update_neighbor(pkt)
    if pkt.msg_type == "ALERT":
        forward_alert(pkt)
    if pkt.msg_type == "CONTROL":
        apply_control(pkt.payload)

// --- NEIGHBOR MANAGEMENT ----------------------------------------------------

function update_neighbor(pkt):
    entry = neighbor_table.find_or_create(pkt.src_id)
    entry.last_seen = timers.now()
    entry.rls = compute_link_score(pkt)

// --- ALERT FORWARDING -------------------------------------------------------

function forward_alert(pkt):
    if pkt.ttl <= 0:
        return
    pkt.ttl -= 1
    radio.send(pkt)

// --- CONTROL ACTIONS --------------------------------------------------------

function apply_control(payload):
    if payload.cmd == "SET_ZONE":
        zone_id = payload.value
    if payload.cmd == "SET_THRESHOLDS":
        update_thresholds(payload.values)

//////////////////////////////////////////////////////////////
// END OF MINIMAL REFERENCE IMPLEMENTATION
//////////////////////////////////////////////////////////////

Why this matters#

This is the bare‑bones firmware skeleton for a resonance‑aware underground mesh node:

• It senses vibration, gas, and stress.
• It computes resonance clarity and drift.
• It forms a self‑healing mesh.
• It prioritizes safety over throughput.
• It forwards alerts even when half the network is gone.
• It’s simple enough to run on a $5 microcontroller.