Add 5s deferred response for commands

src/main.cpp

@@ -96,6 +96,24 @@ public:
         return 0;
     }
 
+    char pending_response[256];
+    unsigned long pending_at = 0;
+    bool pending = false;
+
+    void flush_response() {
+        if (pending && millis() >= pending_at) {
+            send_text(pending_response);
+            pending = false;
+        }
+    }
+
+    void defer_response(const char* text) {
+        strncpy(pending_response, text, sizeof(pending_response) - 1);
+        pending_response[sizeof(pending_response) - 1] = 0;
+        pending_at = millis() + 5000;
+        pending = true;
+    }
+
     void send_text(const char* text) {
         if (!channel_ready) return;
         uint32_t ts = rtc_clock.getCurrentTime();
@@ -130,31 +148,31 @@ public:
         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");
+            defer_response("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");
+            g_armed = true; digitalWrite(PIN_RELAY_1, LOW); saveSecurityConfig(); defer_response("ohrana on ok");
         } else if (strcmp(cmd, "ohrana off") == 0) {
-            g_armed = false; digitalWrite(PIN_RELAY_1, HIGH); saveSecurityConfig(); send_text("ohrana off ok");
+            g_armed = false; digitalWrite(PIN_RELAY_1, HIGH); saveSecurityConfig(); defer_response("ohrana off ok");
         } else if (strcmp(cmd, "relay1 on") == 0) {
-            digitalWrite(PIN_RELAY_1, LOW); send_text("relay1 on ok");
+            digitalWrite(PIN_RELAY_1, LOW); defer_response("relay1 on ok");
         } else if (strcmp(cmd, "relay1 off") == 0) {
-            digitalWrite(PIN_RELAY_1, HIGH); send_text("relay1 off ok");
+            digitalWrite(PIN_RELAY_1, HIGH); defer_response("relay1 off ok");
         } else if (strcmp(cmd, "relay2 on") == 0) {
-            g_relay2_state = true; digitalWrite(PIN_RELAY_2, LOW); send_text("relay2 on ok");
+            g_relay2_state = true; digitalWrite(PIN_RELAY_2, LOW); defer_response("relay2 on ok");
         } else if (strcmp(cmd, "relay2 off") == 0) {
-            g_relay2_state = false; digitalWrite(PIN_RELAY_2, HIGH); send_text("relay2 off ok");
+            g_relay2_state = false; digitalWrite(PIN_RELAY_2, HIGH); defer_response("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);
+            defer_response(r);
         } else if (strcmp(cmd, "ver") == 0) {
-            char r[64]; snprintf(r, sizeof(r), "build:%s %s", __DATE__, __TIME__); send_text(r);
+            char r[64]; snprintf(r, sizeof(r), "build:%s %s", __DATE__, __TIME__); defer_response(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);
+            char r[32]; snprintf(r, sizeof(r), "noise:%.0fdBm", sum / 20); defer_response(r);
         } else if (strncmp(cmd, "security_conf", 13) == 0) {
             const char* nc = cmd + 13; while (*nc == ' ') nc++;
             if (strlen(nc) > 0 && strlen(nc) < 32) {
@@ -163,8 +181,8 @@ public:
                 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);
+                char r[64]; snprintf(r, sizeof(r), "channel:%s", nc); defer_response(r);
-            } else send_text("bad name");
+            } else defer_response("bad name");
         }
     }
 };
@@ -221,6 +239,7 @@ void setup() {
 void loop() {
     NRF_WDT->RR[0] = WDT_RR_RR_Reload;
     the_mesh.loop();
+    the_mesh.flush_response();
     rtc_clock.tick();
 
     if (!g_startup_msg_sent && millis() - g_boot_time >= 10000) {