Update mqtt-dashboard, adopt new UI, break OTA for now..

examples/mqtt-dashboard/device/hal.c

@@ -0,0 +1,19 @@
+#include "hal.h"
+
+#define MAX_PIN_NO 144
+
+// Mocked device pins
+static bool s_pins[MAX_PIN_NO];
+
+bool gpio_write(uint16_t pin, bool status) {
+  bool ok = false;
+  if (pin >= 0 && pin < MAX_PIN_NO) {
+    s_pins[pin] = status;
+    ok = true;
+  }
+  return ok;
+}
+
+bool gpio_read(uint16_t pin) {
+  return (pin >= 0 && pin < MAX_PIN_NO) ? s_pins[pin] : false;
+}