Fix #434: Implement Uptime

api.yml

@@ -773,10 +773,14 @@ paths:
                     x-stoplight:
                       id: 7h1cpgfjj5j9j
                     format: date-time
+                  uptime:
+                    type: integer
+                    description: EVSE gateway uptime, in seconds
                 required:
                   - time
                   - offset
                   - local_time
+                  - uptime
       operationId: get-time
       description: Gets the time set on the OpenEVSE
     post:

models/Status.yaml

@@ -175,3 +175,6 @@ properties:
   limit_version:
     type: integer
     description: /limit endpoint current version
+  uptime:
+    type: integer
+    description: EVSE gateway uptime, in seconds

src/emonesp.h

@@ -173,4 +173,6 @@ extern String serial;
 
 void restart_system();
 
+uint64_t uptimeMillis();
+
 #endif // _EMONESP_H

src/main.cpp

@@ -175,6 +175,8 @@ void
 loop() {
   Profile_Start(loop);
 
+  uptimeMillis();
+
   Profile_Start(Mongoose);
   Mongoose.poll(0);
   Profile_End(Mongoose, 10);
@@ -340,3 +342,13 @@ void handle_serial()
     }
   }
 }
+
+// inspired from https://www.snad.cz/en/2018/12/21/uptime-and-esp8266/
+uint64_t uptimeMillis()
+{
+    static uint32_t low32, high32;
+    uint32_t new_low32 = millis();
+    if (new_low32 < low32) high32++;
+    low32 = new_low32;
+    return (uint64_t) high32 << 32 | low32;
+}

src/time_man.cpp

@@ -278,4 +278,5 @@ void TimeManager::serialise(JsonDocument &doc)
   doc["time"] = time;
   doc["local_time"] = local_time;
   doc["offset"] = offset;
+  doc["uptime"] = uptimeMillis() / 1000;
 }