first commit

application.lua

@@ -0,0 +1,42 @@
+dofile("counter.lua")
+dofile("blinkDetector.lua")
+
+local counter = Counter
+local blinkDetector = BlinkDetector
+
+function countBlinks()
+    local value = adc.read(0)
+    if blinkDetector:isBlinking(value) then
+        counter:increment()
+    end
+end
+
+function metrics()
+    local buffer = {"# TYPE watts gauge\n", "watts ", counter:get(), "\n"}
+    local body = table.concat(buffer)
+    counter:reset()
+    return body
+end
+
+function response()
+  local header = "HTTP/1.1 200 OK\r\nServer: NodeMCU on ESP8266\r\nContent-Type: text/plain; version=0.0.4\r\n\r\n"
+  local response = header .. metrics()
+  print("> " .. response)
+  return response
+end
+
+-- Initiate blink counting thread
+tmr.create():alarm(10, tmr.ALARM_AUTO, countBlinks)
+
+srv = net.createServer(net.TCP, 20) -- 20s timeout
+
+if srv then
+  srv:listen(80, function(conn)
+    conn:on("receive", function(conn, data)
+      print("< "  .. data)
+      conn:send(response(), function(finishConn)
+        finishConn:close()
+        end)
+    end)
+  end)
+end