diff --git a/src/XD0OTA.h b/src/XD0OTA.h
index 9fd52eb..e1a77a6 100644
--- a/src/XD0OTA.h
+++ b/src/XD0OTA.h
@@ -32,6 +32,10 @@ openssl req -x509 -nodes -days 18263 -newkey rsa:2048 -keyout /etc/ssl/private/x
 openssl x509 -noout -fingerprint -sha1 -inform pem -in /etc/ssl/certs/xd0-fwupdate-selfsigned.crt
 
 
+scp .pioenvs/nodemcuv2/firmware.bin user@webserver:/var/www/fwupdate/fota/macaddress.bin
+and change macaddress.version
+
+
 server {
     listen 444 ssl;
     listen [::]:444 ssl;
diff --git a/src/main.cpp b/src/main.cpp
index 6249282..62c79e6 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -8,7 +8,7 @@
 #include <ESP8266WiFi.h>
 #include <ESP8266WiFiMulti.h>
 extern "C" {
-#include <espnow.h>
+//#include <espnow.h>
 #include "user_interface.h"
 }
 
@@ -97,6 +97,8 @@ IPAddress ip, dns, gateway, subnet;
 char ssid[64];
 char password[64];
 
+volatile bool cansleep = false;
+
 struct __attribute__((packed)) SENSOR_DATA {
   float temperature;
   float humidity;
@@ -366,12 +368,37 @@ void ICACHE_FLASH_ATTR sendValues() {
   WiFi.mode(WIFI_OFF);
   WiFi.forceSleepBegin();
   delay(1); // yield();
+}
 
+void fpm_wakup_cb_func1(void) {
+  ESP.wdtFeed();
+  wifi_fpm_close();
+}
+
+void lightsleep() {
+  ESP.wdtFeed();
+  wifi_station_disconnect();
+  wifi_set_opmode(NULL_MODE);
+  wifi_fpm_set_sleep_type(LIGHT_SLEEP_T);
+  wifi_fpm_open(); // Enables force sleep
+  gpio_pin_wakeup_enable(GPIO_ID_PIN(GEIGER_PIN), GPIO_PIN_INTR_HILEVEL);
+  wifi_fpm_set_wakeup_cb(fpm_wakup_cb_func1);
+  wifi_fpm_do_sleep(0xFFFFFFF); // Sleep for longest possible time
+  //delay(1);
+}
+
+void lightsleepwake() {
+  ESP.wdtFeed();
+  wifi_fpm_do_wakeup();
+  wifi_fpm_close();
 }
 
 
 void ICACHE_RAM_ATTR ISR_geiger_impulse() {
+//  lightsleepwake();
   geiger_counts++;
+  //DEBUG_MSG("X");
+  if(cansleep) lightsleep();
 }
 
 // will be called every 6 seconds
@@ -390,6 +417,8 @@ void setup() {
   pinMode(LED_BUILTIN, OUTPUT);
   digitalWrite(LED_BUILTIN, HIGH);  // turn OFF board led
 
+  //ESP.wdtEnable(30000);
+
   sds.begin(SDS_TX, SDS_RX);
   sds.mode_mon_300();
 
@@ -412,7 +441,13 @@ void setup() {
 }
 
 void loop() {
+  cansleep = false;
+//  lightsleepwake();
   //DEBUG_MSG("%d\n", millis() - last_wifi_activity);
   sendValues();
+  DEBUG_MSG("sleeping now...\n");
+  cansleep = true;
+  lightsleep();
   delay(postingInterval);
+  //ESP.deepSleep(10e6);
 }