# How can i find DEVEUI and DEVADDR keys of my TTGO TBEAM V1.1?

**URL:** <https://www.thethingsnetwork.org/forum/t/how-can-i-find-deveui-and-devaddr-keys-of-my-ttgo-tbeam-v1-1/49278>\
**Category:** LMIC\
**Tags:** guide, ttn-mapper\
**Created:** [June 30, 2021, 12:44pm UTC](https://www.thethingsnetwork.org/forum/t/how-can-i-find-deveui-and-devaddr-keys-of-my-ttgo-tbeam-v1-1/49278 "2021-06-30T12:44:10Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![tortudereli](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/tortudereli/32/35697_2.png) [@tortudereli](https://www.thethingsnetwork.org/forum/u/tortudereli)\
**Post date:** [June 30, 2021, 12:44pm UTC](https://www.thethingsnetwork.org/forum/t/how-can-i-find-deveui-and-devaddr-keys-of-my-ttgo-tbeam-v1-1/49278/1 "2021-06-30T12:44:10Z")

</div>

I am working with the Board called LILYGO TBEAM V1.1 and i am trying to find my devEUI and tryed everything to find it but could not find. It has not “Serial1” port so I cannot work with “Device Info” example. Can you guys help me to find it?

#include \<TheThingsNetwork.h\>

#define loraSerial Serial1  
#define debugSerial Serial

// Replace REPLACE\_ME with TTN\_FP\_EU868 or TTN\_FP\_US915  
#define freqPlan TTN\_FP\_EU868

TheThingsNetwork ttn(loraSerial, debugSerial, freqPlan);

void setup()  
{  
loraSerial.begin(57600);  
debugSerial.begin(9600);  
}

void loop()  
{  
debugSerial.println(“Device Information”);  
debugSerial.println();  
ttn.showStatus();  
debugSerial.println();  
debugSerial.println(“Use the EUI to register the device for OTAA”);  
debugSerial.println("-------------------------------------------");  
debugSerial.println();

delay(10000);  
}

---

<div class="post-metadata">

**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\
**Post date:** [June 30, 2021, 1:03pm UTC](https://www.thethingsnetwork.org/forum/t/how-can-i-find-deveui-and-devaddr-keys-of-my-ttgo-tbeam-v1-1/49278/2 "2021-06-30T13:03:40Z")

</div>

You are using the Arduino library for the TTN Uno board which does nothing on a TTGO.

There is a section on the website for the TTGO, perhaps you want to read that and look for the LMIC-node as a library to use.

---

<div class="post-metadata">

**Author:** ![tortudereli](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/tortudereli/32/35697_2.png) [@tortudereli](https://www.thethingsnetwork.org/forum/u/tortudereli)\
**Post date:** [June 30, 2021, 2:35pm UTC](https://www.thethingsnetwork.org/forum/t/how-can-i-find-deveui-and-devaddr-keys-of-my-ttgo-tbeam-v1-1/49278/3 "2021-06-30T14:35:00Z")

</div>

Can u hand that over to me please, sir. Thanks for your answer.

---

<div class="post-metadata">

**Author:** ![paderijk](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/paderijk/32/38263_2.png) [@paderijk](https://www.thethingsnetwork.org/forum/u/paderijk)\
**Post date:** [June 30, 2021, 7:52pm UTC](https://www.thethingsnetwork.org/forum/t/how-can-i-find-deveui-and-devaddr-keys-of-my-ttgo-tbeam-v1-1/49278/4 "2021-06-30T19:52:13Z")

</div>

Maybe you can find some clues in the TTN Mapper for TTGO on GitHub. - [GitHub - kizniche/ttgo-tbeam-ttn-tracker: TTGO T-Beam Tracker for TTN Mapper and TTN Tracker using US (915 MHz) and EU (868 MHz) frequencies](https://github.com/kizniche/ttgo-tbeam-ttn-tracker)

---

<div class="post-metadata">

**Author:** ![bluejedi](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/bluejedi/32/44639_2.png) [@bluejedi](https://www.thethingsnetwork.org/forum/u/bluejedi)\
**Post date:** [June 30, 2021, 11:42pm UTC](https://www.thethingsnetwork.org/forum/t/how-can-i-find-deveui-and-devaddr-keys-of-my-ttgo-tbeam-v1-1/49278/6 "2021-06-30T23:42:41Z")

</div>

> [@tortudereli](#):
>
> Can u hand that over to me please

Use the _Search option_ to search the forum for “ESP32 topic” (Big ESP32 … topic part 3) and for “T-Beam topic” for more information.

TTGO boards (which includes T-Beam) do not come with factory provided DevEUI and DevAddr _(latter is needed for ABP activation only)_.