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Initial commit: Security Mesh Node

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UA1ZBE
2026-07-22 07:56:45 +03:00
commit 965c3e9e30
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#include <Arduino.h>
#include <Mesh.h>
#include <InternalFileSystem.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <helpers/ArduinoHelpers.h>
#include <helpers/NRF52Board.h>
#include <helpers/SimpleMeshTables.h>
#include <helpers/StaticPoolPacketManager.h>
#include <helpers/ChannelDetails.h>
#include <helpers/ArduinoSerialInterface.h>
#include <Crypto.h>
#include <SHA256.h>
#include "target.h"
using namespace Adafruit_LittleFS_Namespace;
#ifdef PROMICRO
PromicroBoard board;
Module radio_module_obj(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, SPI);
RADIO_CLASS radio_module(&radio_module_obj);
WRAPPER_CLASS radio_driver(radio_module, board);
VolatileRTCClock fallback_clock;
AutoDiscoverRTCClock rtc_clock(fallback_clock);
#else
NRF52Board board("Security");
Module radio_module_obj(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, SPI);
RADIO_CLASS radio_module(&radio_module_obj);
WRAPPER_CLASS radio_driver(radio_module, board);
AutoDiscoverRTCClock rtc_clock;
#endif
StdRNG fast_rng;
SimpleMeshTables tables;
OneWire oneWire(PIN_DS18B20);
DallasTemperature ds18b20(&oneWire);
static bool g_armed = false;
static bool g_hall_alert = false;
static bool g_motion_alert = false;
static bool g_relay2_state = false;
static bool g_temp_requested = false;
static unsigned long g_temp_last_request = 0;
static float g_last_temperature = -127.0f;
static unsigned long g_last_hall_alert = 0;
static unsigned long g_last_motion_alert = 0;
static const unsigned long ALERT_COOLDOWN_MS = 600000;
static unsigned long g_boot_time = 0;
static bool g_startup_msg_sent = false;
struct SecurityConfig { uint32_t magic; uint8_t armed; uint8_t relay2; };
static const uint32_t CFG_MAGIC = 0x53454355;
bool saveSecurityConfig() {
SecurityConfig cfg = { CFG_MAGIC, g_armed ? 1 : 0, g_relay2_state ? 1 : 0 };
File f = InternalFS.open(CONFIG_FILE, FILE_O_WRITE);
if (!f) return false;
bool ok = f.write((const uint8_t*)&cfg, sizeof(cfg)) == sizeof(cfg);
f.close(); return ok;
}
bool loadSecurityConfig() {
File f = InternalFS.open(CONFIG_FILE, FILE_O_READ);
if (!f) return false;
SecurityConfig cfg;
if (f.read(&cfg, sizeof(cfg)) != sizeof(cfg)) { f.close(); return false; }
f.close();
if (cfg.magic != CFG_MAGIC) return false;
g_armed = cfg.armed; g_relay2_state = cfg.relay2;
return true;
}
class SecurityMesh : public mesh::Mesh {
public:
mesh::GroupChannel mesh_channel;
bool channel_ready = false;
SecurityMesh(mesh::Radio& r, mesh::RNG& rng, mesh::RTCClock& clock, SimpleMeshTables& t)
: Mesh(r, *new ArduinoMillis(), rng, clock, *new StaticPoolPacketManager(16), t) {}
void setup_channel() {
uint8_t key[32];
SHA256 sha; sha.reset(); sha.update((const uint8_t*)"1234", 4); sha.finalize(key, 32);
memset(mesh_channel.secret, 0, 32);
memcpy(mesh_channel.secret, key, 16);
mesh::Utils::sha256(mesh_channel.hash, sizeof(mesh_channel.hash), mesh_channel.secret, 16);
channel_ready = true;
}
int searchChannelsByHash(const uint8_t* hash, mesh::GroupChannel channels[], int max_matches) override {
if (max_matches > 0 && channel_ready && memcmp(hash, mesh_channel.hash, sizeof(mesh_channel.hash)) == 0) {
channels[0] = mesh_channel;
return 1;
}
return 0;
}
void send_text(const char* text) {
if (!channel_ready) return;
uint32_t ts = rtc_clock.getCurrentTime();
uint8_t buf[256];
memcpy(buf, &ts, 4);
buf[4] = 0;
int tlen = strlen(text);
if (tlen > 200) tlen = 200;
memcpy(buf + 5, text, tlen);
auto pkt = createGroupDatagram(PAYLOAD_TYPE_GRP_TXT, mesh_channel, buf, 5 + tlen);
if (pkt) sendFlood(pkt, (uint32_t)0, (uint8_t)1);
}
void onGroupDataRecv(mesh::Packet* pkt, uint8_t type, const mesh::GroupChannel& channel, uint8_t* data, size_t len) override {
if (type != PAYLOAD_TYPE_GRP_TXT) return;
if (len < 5 || data[4] != 0) return;
for (int i = 0; i < 3; i++) { digitalWrite(PIN_LED_STATUS, HIGH); delay(50); digitalWrite(PIN_LED_STATUS, LOW); delay(50); }
int tlen = len - 5;
if (tlen > 250) tlen = 250;
char text[256];
memcpy(text, data + 5, tlen);
text[tlen] = 0;
int i = tlen; while (i > 0 && text[i-1] == ' ') { text[i-1] = 0; i--; }
for (int i = 0; text[i]; i++) { if (text[i] >= 'A' && text[i] <= 'Z') text[i] += 32; }
const char* cmd = text;
const char* colon = strchr(text, ':');
if (colon && colon[1] == ' ') cmd = colon + 2;
while (*cmd == ' ') cmd++;
if (strcmp(cmd, "help") == 0) {
send_text("help:ohrana on,ohrana off,relay1 on,relay1 off,relay2 on,relay2 off,status,ver,scan,security_conf");
} else if (strcmp(cmd, "ohrana on") == 0) {
g_armed = true; digitalWrite(PIN_RELAY_1, LOW); saveSecurityConfig(); send_text("ohrana on ok");
} else if (strcmp(cmd, "ohrana off") == 0) {
g_armed = false; digitalWrite(PIN_RELAY_1, HIGH); saveSecurityConfig(); send_text("ohrana off ok");
} else if (strcmp(cmd, "relay1 on") == 0) {
digitalWrite(PIN_RELAY_1, LOW); send_text("relay1 on ok");
} else if (strcmp(cmd, "relay1 off") == 0) {
digitalWrite(PIN_RELAY_1, HIGH); send_text("relay1 off ok");
} else if (strcmp(cmd, "relay2 on") == 0) {
g_relay2_state = true; digitalWrite(PIN_RELAY_2, LOW); send_text("relay2 on ok");
} else if (strcmp(cmd, "relay2 off") == 0) {
g_relay2_state = false; digitalWrite(PIN_RELAY_2, HIGH); send_text("relay2 off ok");
} else if (strcmp(cmd, "status") == 0) {
char r[128]; char tb[16]; float t = g_last_temperature;
if (t == -127.0f) strcpy(tb, "N/A"); else snprintf(tb, sizeof(tb), "%+.1fC", t);
snprintf(r, sizeof(r), "status:%s temp:%s hall:%s motion:%s",
g_armed ? "armed" : "off", tb, g_hall_alert ? "trig" : "ok", g_motion_alert ? "trig" : "ok");
send_text(r);
} else if (strcmp(cmd, "ver") == 0) {
char r[64]; snprintf(r, sizeof(r), "build:%s %s", __DATE__, __TIME__); send_text(r);
} else if (strcmp(cmd, "scan") == 0) {
float sum = 0;
for (int j = 0; j < 20; j++) { sum += radio_driver.getCurrentRSSI(); delay(50); }
char r[32]; snprintf(r, sizeof(r), "noise:%.0fdBm", sum / 20); send_text(r);
} else if (strncmp(cmd, "security_conf", 13) == 0) {
const char* nc = cmd + 13; while (*nc == ' ') nc++;
if (strlen(nc) > 0 && strlen(nc) < 32) {
uint8_t key[32];
SHA256 sha; sha.reset(); sha.update((const uint8_t*)nc, strlen(nc)); sha.finalize(key, 32);
memset(mesh_channel.secret, 0, 32);
memcpy(mesh_channel.secret, key, 16);
mesh::Utils::sha256(mesh_channel.hash, sizeof(mesh_channel.hash), mesh_channel.secret, 16);
char r[64]; snprintf(r, sizeof(r), "channel:%s", nc); send_text(r);
} else send_text("bad name");
}
}
};
SecurityMesh the_mesh(radio_driver, fast_rng, rtc_clock, tables);
bool radio_init() {
#ifdef PROMICRO
board.begin();
#endif
SPI.setPins(P_LORA_MISO, P_LORA_SCLK, P_LORA_MOSI);
SPI.begin();
if (radio_module.begin() != RADIOLIB_ERR_NONE) return false;
radio_module.setDio2AsRfSwitch(true);
radio_module.setTCXO(SX126X_DIO3_TCXO_VOLTAGE);
radio_module.setCurrentLimit(SX126X_CURRENT_LIMIT);
radio_driver.setParams(LORA_FREQ, LORA_BW, LORA_SF, LORA_CR);
radio_driver.setTxPower(LORA_TX_POWER);
radio_driver.setRxBoostedGainMode(true);
return true;
}
void setup() {
Serial.begin(115200);
g_boot_time = millis();
NRF_WDT->CONFIG = (WDT_CONFIG_SLEEP_Run << WDT_CONFIG_SLEEP_Pos) | (WDT_CONFIG_HALT_Pause << WDT_CONFIG_HALT_Pos);
NRF_WDT->CRV = (WDT_TIMEOUT_MS * 32768) / 1000;
NRF_WDT->RREN = WDT_RREN_RR0_Enabled << WDT_RREN_RR0_Pos;
NRF_WDT->TASKS_START = 1;
pinMode(PIN_REED, INPUT_PULLUP); pinMode(PIN_PIR, INPUT); ds18b20.begin();
pinMode(PIN_RELAY_1, OUTPUT); pinMode(PIN_RELAY_2, OUTPUT); pinMode(PIN_LED_STATUS, OUTPUT);
digitalWrite(PIN_RELAY_1, HIGH); digitalWrite(PIN_RELAY_2, HIGH); digitalWrite(PIN_LED_STATUS, LOW);
InternalFS.begin();
loadSecurityConfig();
if (g_armed) digitalWrite(PIN_RELAY_1, LOW); else digitalWrite(PIN_RELAY_1, HIGH);
digitalWrite(PIN_RELAY_2, g_relay2_state ? LOW : HIGH);
if (!radio_init()) {
Serial.println("RADIO FAIL");
while (1) { digitalWrite(PIN_LED_STATUS, HIGH); delay(100); digitalWrite(PIN_LED_STATUS, LOW); delay(100); }
}
fast_rng.begin(radio_driver.getRngSeed());
the_mesh.setup_channel();
the_mesh.begin();
Serial.println("OK");
}
void loop() {
NRF_WDT->RR[0] = WDT_RR_RR_Reload;
the_mesh.loop();
rtc_clock.tick();
if (!g_startup_msg_sent && millis() - g_boot_time >= 10000) {
g_startup_msg_sent = true;
char m[80]; snprintf(m, sizeof(m), "poweron %s %s", __DATE__, __TIME__);
the_mesh.send_text(m);
}
unsigned long now = millis();
int reed = digitalRead(PIN_REED);
if (g_armed && reed == HIGH && !g_hall_alert && now - g_last_hall_alert > ALERT_COOLDOWN_MS) {
g_hall_alert = true; g_last_hall_alert = now; the_mesh.send_text("alert:hall");
}
int pir = digitalRead(PIN_PIR);
if (g_armed && pir == HIGH && !g_motion_alert && now - g_last_motion_alert > ALERT_COOLDOWN_MS) {
g_motion_alert = true; g_last_motion_alert = now; the_mesh.send_text("alert:motion");
}
if (g_hall_alert && reed == LOW) g_hall_alert = false;
if (g_motion_alert && pir == LOW) g_motion_alert = false;
if (!g_temp_requested) { ds18b20.requestTemperatures(); g_temp_requested = true; g_temp_last_request = now; }
else if (now - g_temp_last_request > 750) { g_last_temperature = ds18b20.getTempCByIndex(0); g_temp_requested = false; }
if (g_armed) {
static unsigned long lt = 0; static bool ls = false;
if (now - lt > 1000) { lt = now; ls = !ls; digitalWrite(PIN_LED_STATUS, ls); }
} else digitalWrite(PIN_LED_STATUS, LOW);
}