reduce esp8266 net churn

Author: ZeroBitsTech

CHANGELOG.md

@@ -10,6 +10,7 @@
 
 - Added `ZeroNetProfileEsp8266`, a constrained MQTT-first preset for Wemos / ESP8266.
 - Added optional offline queue gating in `ZeroHttpPump` and `ZeroMqttPump` so constrained boards can refuse backlog when link or transport is down.
+- Reduced scheduler contention in the ESP8266 preset by staggering network task start offsets and lowering idle network task cadence.
 - Added generic compare workloads for `EnvMonitor`, `TelemetryGateway`, and `IndustrialLoop`.
 - Added repeatable ESP32 compare runners plus a cross-target workload compile matrix.
 - Improved telemetry gateway tuning so module throughput rises without queue buildup.

README.md

@@ -117,7 +117,7 @@ Current target maturity:
 Recommended board-specific path:
 
 - **ESP32:** use the default network module configs first, then validate against your real endpoint.
-- **ESP8266 / Wemos:** start with `ZeroNetProfileEsp8266`. It is a BETA, MQTT-first constrained preset that disables periodic HTTP dispatch by default and prevents offline queue buildup so constrained boards do not need heavy manual tuning just to stay responsive.
+- **ESP8266 / Wemos:** start with `ZeroNetProfileEsp8266`. It is a BETA, MQTT-first constrained preset that disables periodic HTTP dispatch by default, prevents offline queue buildup, and staggers slower network task cadence so constrained boards do not need heavy manual tuning just to stay responsive.
 
 Current best module tradeoff reference (ESP32, `LEAN_NET`, manual pattern vs module pattern):
 

examples/LiveNetworkNode/LiveNetworkNode.ino

@@ -441,10 +441,14 @@ void setup() {
 
 #if defined(ARDUINO_ARCH_ESP8266)
   ZeroKernel.addTask("Sample", sampleTask, ZeroNetProfileEsp8266::kSampleTaskIntervalMs, 0);
-  ZeroKernel.addTask("WiFiMaint", wifiMaintainerTask, ZeroNetProfileEsp8266::kWiFiTaskIntervalMs, 0);
-  ZeroKernel.addTask("HttpPump", httpPumpTask, ZeroNetProfileEsp8266::kHttpTaskIntervalMs, 0);
-  ZeroKernel.addTask("MqttPump", mqttPumpTask, ZeroNetProfileEsp8266::kMqttTaskIntervalMs, 0);
-  ZeroKernel.addTask("Dispatch", dispatchTask, ZeroNetProfileEsp8266::kDispatchTaskIntervalMs, 0);
+  ZeroKernel.addTask("WiFiMaint", wifiMaintainerTask, ZeroNetProfileEsp8266::kWiFiTaskIntervalMs,
+                     ZeroNetProfileEsp8266::kWiFiTaskStartDelayMs);
+  ZeroKernel.addTask("HttpPump", httpPumpTask, ZeroNetProfileEsp8266::kHttpTaskIntervalMs,
+                     ZeroNetProfileEsp8266::kHttpTaskStartDelayMs);
+  ZeroKernel.addTask("MqttPump", mqttPumpTask, ZeroNetProfileEsp8266::kMqttTaskIntervalMs,
+                     ZeroNetProfileEsp8266::kMqttTaskStartDelayMs);
+  ZeroKernel.addTask("Dispatch", dispatchTask, ZeroNetProfileEsp8266::kDispatchTaskIntervalMs,
+                     ZeroNetProfileEsp8266::kDispatchTaskStartDelayMs);
 #else
   ZeroKernel.addTask("Sample", sampleTask, kSampleTaskIntervalMs, 0);
   ZeroKernel.addTask("WiFiMaint", wifiMaintainerTask, 100, kWiFiMaintStartDelayMs);

src/modules/net/ZeroNetProfileEsp8266.h

@@ -13,22 +13,27 @@ namespace net {
 // This profile intentionally prefers MQTT cadence over aggressive HTTP churn.
 struct ZeroNetProfileEsp8266 {
   static const unsigned long kSampleTaskIntervalMs = 100UL;
-  static const unsigned long kWiFiTaskIntervalMs = 100UL;
-  static const unsigned long kHttpTaskIntervalMs = 100UL;
-  static const unsigned long kMqttTaskIntervalMs = 100UL;
-  static const unsigned long kDispatchTaskIntervalMs = 100UL;
+  static const unsigned long kWiFiTaskIntervalMs = 250UL;
+  static const unsigned long kHttpTaskIntervalMs = 250UL;
+  static const unsigned long kMqttTaskIntervalMs = 500UL;
+  static const unsigned long kDispatchTaskIntervalMs = 250UL;
   static const unsigned long kReportTaskIntervalMs = 250UL;
 
+  static const unsigned long kWiFiTaskStartDelayMs = 25UL;
+  static const unsigned long kHttpTaskStartDelayMs = 75UL;
+  static const unsigned long kMqttTaskStartDelayMs = 125UL;
+  static const unsigned long kDispatchTaskStartDelayMs = 175UL;
+
   static const unsigned long kHttpDispatchPeriodMs = 0UL;
   static const unsigned long kMqttDispatchPeriodMs = 1000UL;
   static const unsigned long kHttpIoTimeoutMs = 200UL;
 
   static ZeroWiFiMaintainer::Config wifiConfig() {
     ZeroWiFiMaintainer::Config config;
     config.pollIntervalMs = 1000UL;
-    config.retryBaseMs = 10000UL;
-    config.retryMaxMs = 30000UL;
-    config.retryJitterMs = 500UL;
+    config.retryBaseMs = 4000UL;
+    config.retryMaxMs = 12000UL;
+    config.retryJitterMs = 350UL;
     config.stablePollMultiplier = 4;
     config.stableThreshold = 6;
     return config;