# TTGO T-Beam topic

**URL:** <https://www.thethingsnetwork.org/forum/t/ttgo-t-beam-topic/15297>\
**Category:** End Devices (Nodes)\
**Created:** [June 25, 2018, 2:58pm UTC](https://www.thethingsnetwork.org/forum/t/ttgo-t-beam-topic/15297 "2018-06-25T14:58:18Z")\
**Posts on this page:** 1\
**Showing post:** 71

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**Author:** ![2solve](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/2solve/32/35697_2.png) [@2solve](https://www.thethingsnetwork.org/forum/u/2solve)\
**Post date:** [November 6, 2018, 7:26pm UTC](https://www.thethingsnetwork.org/forum/t/ttgo-t-beam-topic/15297/71 "2018-11-06T19:26:53Z")

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Hello rodri16,

I tried the TTGO beam and I did have the same problem as you guys. I was not able to put the GPS in sleep mode and the current was about 50 mA. I then desoldered the GPS module and the current went to 2.2 mA, ever so this is much better, for a low battery application this is still pretty high.

I also tried the TTGO LoRA V2.0 the current in sleep mode is 0.16 mA for this chip. (I did also remove a LED that didn’t turn off, I don’t know if this LED is connected to a GPIO).

```
Serial.println("go in to sleep");
esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
esp_deep_sleep_start();
```

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