Added a delay at bootup to allow pushing an OTA update in case of broken, looping code.

README.md

@@ -38,4 +38,5 @@ During startup:
 * 1 green corner: FastLED is initialized. Layout is now being analyzed.
 * 2 green corners: Layout is done. WiFi is being connected.
 * 3 green corners: WiFi connection established. Connecting to MQTT server.
+* 4 green corners (only if OTA_DELAY is set): Waiting for an OTA connection.
 * Everything green (quarter of a second): Initialization done.

include/config.sample.h

@@ -24,6 +24,10 @@
 // Maximum color difference for the random effects.
 // This changes the hue value +/- this value. Use a maximum value of 127, otherwise strange things might happen.
 #define COLOR_DIFFERENCE 25
+// If this is enabled, the node layout will be visualized at startup.
+#define SHOW_LAYOUT_AT_BOOT
+// Wait this many seconds for OTA requests during startup.
+#define WAIT_FOR_OTA 5
 
 #define WIFI_SSID "..."
 #define WIFI_PASS "..."

src/main.cpp

@@ -132,15 +132,31 @@ void show_all() {
 }
 
 void show_status(uint8_t status, CRGB color=CRGB::Green) {
-	for (int i=0; i<status; i++) {
+	for (int i=0; i<status*LEDS_PER_CORNER && i<LED_COUNT; i++) {
-		if (i<corners.size()) {
+		leds[i] = color;
-			corners[i]->set_color(color);
+	}
+	
+	for (int i=status*LEDS_PER_CORNER; i<LED_COUNT; i++) {
+		leds[i] = CRGB::Black;
+	}
+	FastLED.show();
+}
+
+void display_layout() {
+	for(Corner* corner : corners) {
+		corner->set_color(CRGB::Blue);
+		for(Corner* c : corner->_short_neighbours) {
+			c->set_color(CRGB::Red);
+		}
+		for(Corner* c : corner->_long_neighbours) {
+			c->set_color(CRGB::Green);
+		}
+		show_all();
+		delay(1500);
+		for(Corner* c : corners) {
+			c->set_color(CRGB::Black);
 		}
 	}
-	for (int i=status; i<corners.size(); i++) {
-		corners[i]->set_color(CRGB::Black);
-	}
-	show_all();
 }
 
 void setup() {
@@ -170,12 +186,29 @@ void setup() {
 		ArduinoOTA.onEnd([](){ show_status(0); });
 		ArduinoOTA.begin();
 
+		#ifdef WAIT_FOR_OTA
+			show_status(4);
+			LOGln("Waiting %d seconds for OTA requests...", WAIT_FOR_OTA);
+			unsigned long ota_target_time = millis() + WAIT_FOR_OTA*1000;
+			while (millis() < ota_target_time) {
+				ArduinoOTA.handle();
+				yield();
+			}
+			LOGln("Done waiting for OTA requests.");
+		#endif
+
 		show_status(255);
 		delay(250);
 		show_status(0);
 	#endif
 
-	syslog("Setup done.");
+	LOGln("Setup done.");
+
+	#ifdef SHOW_LAYOUT_AT_BOOT
+		LOGln("SHOW_LAYOUT_AT_BOOT is active - showing layout...");
+		display_layout();
+		LOGln("Showing layout is done.");
+	#endif
 }
 
 void loop() {

src/mqtt.cpp

@@ -5,15 +5,15 @@
 
 void connect() {
 LOGln("Connecting to MQTT broker...");
-    if (mqtt.connect(MQTT_CLIENT_ID, MQTT_USER, MQTT_PASS, MQTT_TOPIC "state", 0, true, "OFFLINE")) {
+    if (mqtt.connect(MQTT_CLIENT_ID, MQTT_USER, MQTT_PASS, MQTT_TOPIC "available", 0, true, "offline")) {
         LOGln("Connected.");
         mqtt.publish(MQTT_TOPIC "available", "online", true);
         char buffer[40];
         snprintf(buffer, 40, "online %s", wifi.localIP().toString().c_str());
         mqtt.publish(MQTT_TOPIC "available_long", buffer, true);
         mqtt.subscribe(MQTT_TOPIC"cmnd");
-        String discovery_msg = "{\""
+        String discovery_msg = "{"
-            "\"~\":\"" MQTT_TOPIC ",\"avty_t\":\"~available\",\"cmd_t\":\"~cmnd\",\"stat_t\":\"~state\","
+            "\"~\":\"" MQTT_TOPIC "\",\"avty_t\":\"~available\",\"cmd_t\":\"~cmnd\",\"stat_t\":\"~state\","
             "\"name\":\"ESPleaf\",\"schema\":\"json\","
             "\"brightness\":true,\"bri_scl\":255,"
             "\"effect\":true,\"effect_list\":[\"off\",\"corners\",\"nodes\",\"flash\",\"static\"],"
@@ -62,6 +62,7 @@ void mqtt_setup() {
     mqtt.setServer(MQTT_SERVER, MQTT_SERVER_PORT);
     mqtt.setCallback(callback);
     mqtt.setSocketTimeout(1);
+    mqtt.setBufferSize(400);
     connect();
 }
 

src/syslog.cpp

@@ -2,6 +2,8 @@
 #include "config.h"
 
 #ifdef SYSLOG_HOST
+	static uint16_t syslog_msg_id = 1;
+
 	void syslog(String msg, uint8_t severity) {
 		uint8_t facility = 16; // local0
 		if (severity > 7) severity = 7;
@@ -10,7 +12,9 @@
 		udp.beginPacket(SYSLOG_HOST, SYSLOG_PORT);
 		udp.write("<");
 		udp.write(String(facility * 8 + severity).c_str());
-		udp.write(">1 - " OTA_HOSTNAME " espleaf 1 1 - ");
+		udp.write(">1 - " OTA_HOSTNAME " core 1 ");
+		udp.write(String(syslog_msg_id++).c_str());
+		udp.write(" - ");
 		udp.write(msg.c_str());
 		udp.endPacket();
 	}