# Can not connect device with network **URL:** \ **Category:** How to get started\ **Created:** [March 19, 2020, 8:42am UTC](https://www.thethingsnetwork.org/forum/t/can-not-connect-device-with-network/35483 "2020-03-19T08:42:46Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Marc\_Reimann](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/marc_reimann/32/25844_2.png) [@Marc\_Reimann](https://www.thethingsnetwork.org/forum/u/Marc_Reimann)\ **Post date:** [March 19, 2020, 8:42am UTC](https://www.thethingsnetwork.org/forum/t/can-not-connect-device-with-network/35483/1 "2020-03-19T08:42:46Z")
Dear TTN Community I am trying to do my first steps with TTN. I want to start with a Elsys CO2 Sensor which I want to connect to the network. Unfortunatly I can not realize a connection. ![grafik](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/5/1/5107c7d4fad36eba504bf3a4992ecfb5636c80e5.png) I have checked coverage in Hamburg and my place. I followed the instruction [https://www.thethingsnetwork.org/docs/devices/](https://www.thethingsnetwork.org/docs/devices/) for OTTA activation I checked DEVEUI APPEUI and Key several times. ![grafik](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/5/9/593a06bf148534cf272edafef68f078db52eb722.png) But the sensor still remains in the status “not seen”. and I can not manage any connection. Any advice would be appreciated. Regards…Marc ---
**Author:** ![IoT\_Marco](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/iot_marco/32/45432_2.png) [@IoT\_Marco](https://www.thethingsnetwork.org/forum/u/IoT_Marco)\ **Post date:** [March 19, 2020, 10:44pm UTC](https://www.thethingsnetwork.org/forum/t/can-not-connect-device-with-network/35483/2 "2020-03-19T22:44:31Z")
Hi Marc, I assume you have acted according to the [Operating Manual](https://elsys.se/public/manuals/Operating%20Manual%20ERS%20CO2.pdf). What is the LED status as described in the manual on page 11? In addition, it is important to know whether you are within range of a Gateway. The map is nicely colored blue, but that is no guarantee that your package will be received. If possible, you could test at a different location or on a higher point? ---
**Author:** ![Marc\_Reimann](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/marc_reimann/32/25844_2.png) [@Marc\_Reimann](https://www.thethingsnetwork.org/forum/u/Marc_Reimann)\ **Post date:** [March 20, 2020, 1:47pm UTC](https://www.thethingsnetwork.org/forum/t/can-not-connect-device-with-network/35483/3 "2020-03-20T13:47:52Z")
Hi Marco Thanks for your reply! LED status is blinking orange every 10sec - sending joining request. I guess you are right, it is the coverage. I will try to find a new location. ---
**Author:** ![arjanvanb](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/arjanvanb/32/46626_2.png) [@arjanvanb](https://www.thethingsnetwork.org/forum/u/arjanvanb)\ **Post date:** [March 20, 2020, 2:42pm UTC](https://www.thethingsnetwork.org/forum/t/can-not-connect-device-with-network/35483/4 "2020-03-20T14:42:02Z")
Also: try taking the device outside. If possible with some (almost) line of sight to a gateway. Or when following the lines on the map (or when choosing a different display style) you can see where people were when their test node’s data was received successfully. ---
**Author:** ![Marc\_Reimann](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/marc_reimann/32/25844_2.png) [@Marc\_Reimann](https://www.thethingsnetwork.org/forum/u/Marc_Reimann)\ **Post date:** [March 23, 2020, 10:49am UTC](https://www.thethingsnetwork.org/forum/t/can-not-connect-device-with-network/35483/5 "2020-03-23T10:49:33Z")
> [@arjanvanb](#): > > or when choosing a different display style) you can see where people were when their test node’s data was received successfully. Thx! I will need to find a new location.