diff --git a/battery.lua b/battery.lua
new file mode 100644
index 0000000..c4ec638
--- /dev/null
+++ b/battery.lua
@@ -0,0 +1,17 @@
+gpio.mode(5, gpio.OUTPUT)
+gpio.write(5, gpio.HIGH)
+
+gpio.mode(6, gpio.OUTPUT)
+gpio.write(6, gpio.LOW)
+tmr.delay(100000)
+gpio.write(5, gpio.LOW)
+gpio.mode(6, gpio.INPUT)
+local cnt = 0
+while (gpio.read(6) == 0) do
+	cnt = cnt + 1
+	if cnt > 4000 then
+		break
+	end
+	tmr.delay(1000)
+end
+return cnt
diff --git a/ds18b20.lua b/ds18b20.lua
new file mode 100644
index 0000000..0b039eb
--- /dev/null
+++ b/ds18b20.lua
@@ -0,0 +1,56 @@
+local pin = 7
+
+local function read()
+	local count = 0
+	local addr
+	
+	ow.setup(pin)
+	
+	ow.reset_search(pin)
+	repeat
+		count = count + 1
+		addr = ow.search(pin)
+		tmr.wdclr()
+	until((addr ~= nil) or (count > 100))
+	ow.reset_search(pin)
+	
+	if(addr == nil) then
+		return result
+	end
+	local crc = ow.crc8(string.sub(addr,1,7))
+	if (crc == addr:byte(8)) then
+		if ((addr:byte(1) == 0x10) or (addr:byte(1) == 0x28)) then
+			ow.reset(pin)
+			ow.select(pin, addr)
+			ow.write(pin, 0x44, 1)
+			tmr.delay(10000)
+			present = ow.reset(pin)
+			ow.select(pin, addr)
+			ow.write(pin,0xBE,1)
+			local data = string.char(ow.read(pin))
+			for i = 1, 8 do
+				data = data .. string.char(ow.read(pin))
+			end
+			crc = ow.crc8(string.sub(data,1,8))
+			if (crc == data:byte(9)) then
+				local t = (data:byte(1) + data:byte(2) * 256) * 625
+				local t1 = t / 10000
+				local t2 = t % 10000
+				if t1 < -50 or t1 > 50 then return nil end
+				return t1.."."..string.format("%04u", t2)
+			end
+			tmr.wdclr()
+		end
+	end
+	return nil
+end
+
+
+local res
+local i
+for i = 1,20 do
+	res = read()
+	if res ~= nil then return res end
+end
+return ""
+
diff --git a/esp8266_server.py b/esp8266_server.py
index 7eb68da..ca3b122 100755
--- a/esp8266_server.py
+++ b/esp8266_server.py
@@ -4,34 +4,12 @@
 import socket, time
 
 
-def calcData(data):
-	D1 = -39.7  # for 14 Bit @ 3.3V
-	D2 =  0.01 # for 14 Bit DEGC
-
-	C1 = -2.0468       # for 12 Bit
-	C2 =  0.0367       # for 12 Bit
-	C3 = -0.0000015955 # for 12 Bit
-	T1 =  0.01      # for 14 Bit @ 3.3V
-	T2 =  0.00008   # for 14 Bit @ 3.3V
-
-	rawTemp, rawHum = data
-	rawTemp = float(rawTemp)
-	rawHum = float(rawHum)
-
-	temp = rawTemp * D2 + D1
-
-	linHum = C1 + C2 * rawHum + C3 * rawHum * rawHum
-	hum = (temp - 25.0) * (T1 + T2 * rawHum) + linHum
-
-	return (temp, hum)
-
-
-addr = ('192.168.0.66', 8266)
+addr = ('192.168.0.115', 8266)
 
 sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
 sock.bind(addr)
 
-DEEP_SLEEP_TIME = 3
+DEEP_SLEEP_TIME = 60
 MAX_CONNECTION_ATTEMPTS = 20
 
 
@@ -40,19 +18,25 @@ def calcData(data):
 	s, addr = sock.recvfrom(1024)
 
 	data = s.split(',')
-	if len(data) != 4:
+	if len(data) != 7:
 		print 'Incorrect data: "%s"' % (s)
 		continue
 
-	temp, hum, ds_time, max_conn = data
-	temp, hum = calcData((temp, hum))
-	ds_time, max_conn = int(ds_time), int(max_conn)
-
-	print '%d) %s T=%.2f, H=%.2f%% (ds=%d, mc=%d)' % (cnt, time.strftime("%H:%M:%S"), temp, hum, ds_time, max_conn)
-
-	if ds_time != DEEP_SLEEP_TIME or max_conn != MAX_CONNECTION_ATTEMPTS:
-		sock.sendto('%d,%d' % (DEEP_SLEEP_TIME, MAX_CONNECTION_ATTEMPTS), addr)
-		print '\tSent new settings: ds=%d, mc=%d' % (DEEP_SLEEP_TIME, MAX_CONNECTION_ATTEMPTS)
+	temp, hum, btemp, battery, ds_time, max_conn, conn_time = data
+	if not temp:
+		temp = -666
+	if not hum:
+		hum = -666
+	if not btemp:
+		btemp = -666
+	temp, hum, btemp = float(temp), float(hum), float(btemp)
+	battery, ds_time, max_conn, conn_time = int(battery), int(ds_time), int(max_conn), int(conn_time)
+
+	print '%d) %s T=%.2f, H=%.2f%%, BT=%.2f (bat=%d, ds=%d, mc=%d, ct=%d)' % (cnt, time.strftime("%H:%M:%S"), temp, hum, btemp, battery, ds_time, max_conn, conn_time)
+
+	#if ds_time != DEEP_SLEEP_TIME or max_conn != MAX_CONNECTION_ATTEMPTS:
+		#sock.sendto('%d,%d' % (DEEP_SLEEP_TIME, MAX_CONNECTION_ATTEMPTS), addr)
+		#print '\tSent new settings: ds=%d, mc=%d' % (DEEP_SLEEP_TIME, MAX_CONNECTION_ATTEMPTS)
 
 	cnt += 1
 
diff --git a/init.lua b/init.lua
index fe10554..b7471c0 100644
--- a/init.lua
+++ b/init.lua
@@ -1,3 +1,6 @@
+battery = dofile("battery.lua")
+collectgarbage()
+
 deep_sleep_time = 600
 max_connection_attempts = 20
 temp = ""
@@ -5,13 +8,12 @@ hum = ""
 btemp = ""
 run_cnt = 0
 
+
 local function sleep()
-	print("sleep")
 	node.dsleep(deep_sleep_time * 1000000)
 end
 
 function run()
-	print("run")
 	if run_cnt == 0 then
 		local data = dofile("sht1x_v2.lua")
 		temp = (data[1])
@@ -21,7 +23,6 @@ function run()
 		
 		btemp = dofile("ds18b20.lua")
 		collectgarbage()
-		print(temp, hum, btemp)
 	end
 	
 	run_cnt = run_cnt + 1
@@ -33,8 +34,10 @@ function run()
 
 	tmr.stop(0)
 	collectgarbage()
-	print("send")
 	dofile("send.lua")
+	temp = nil
+	hum = nil
+	btemp = nil
 	tmr.alarm(0, 100, 0, sleep)
 end
 
diff --git a/send.lua b/send.lua
index f79d1c2..f8ab471 100644
--- a/send.lua
+++ b/send.lua
@@ -3,5 +3,6 @@ local server_port = 8266
 
 local conn = net.createConnection(net.UDP)
 conn:connect(server_port, server_ip)
-conn:send(temp..","..hum..","..btemp..","..deep_sleep_time..","..max_connection_attempts..","..run_cnt)
+conn:send(temp..","..hum..","..btemp..","..battery..","..deep_sleep_time..","..max_connection_attempts..","..run_cnt)
 conn:close()
+conn = nil
diff --git a/sht1x_v2.lua b/sht1x_v2.lua
index 0736ae2..c6e79d9 100644
--- a/sht1x_v2.lua
+++ b/sht1x_v2.lua
@@ -56,7 +56,6 @@ end
 local function init()
 	gpio.mode(sda, gpio.INPUT)
 	gpio.mode(scl, gpio.OUTPUT)
-	print("SHT1x init done")
 end
 
 local function wait()
@@ -119,8 +118,8 @@ local function num_to_str(val, mult)
 		sign = "-"
 	end
 	local v1 = val/mult
-	local v2 = val%mult
-	local res = string.format("%d.%04d", v1, v2)
+	local v2 = (val/(mult/1000))%1000
+	local res = string.format("%d.%03d", v1, v2)
 	return sign..res
 end