# TTGO T-Beam V1.0 & OLED & deep sleep needs proper power design

**URL:** <https://www.thethingsnetwork.org/forum/t/ttgo-t-beam-v1-0-oled-deep-sleep-needs-proper-power-design/30800>\
**Category:** Hardware\
**Created:** [October 15, 2019, 6:17pm UTC](https://www.thethingsnetwork.org/forum/t/ttgo-t-beam-v1-0-oled-deep-sleep-needs-proper-power-design/30800 "2019-10-15T18:17:53Z")\
**Posts on this page:** 1\
**Showing post:** 23

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**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:** [October 16, 2019, 10:14am UTC](https://www.thethingsnetwork.org/forum/t/ttgo-t-beam-v1-0-oled-deep-sleep-needs-proper-power-design/30800/23 "2019-10-16T10:14:14Z")

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Three possible workarounds for the I2C issues caused by (ill-behaving) external display:

- Use a different OLED display module. _Assuming this is an incidental and not a more generic (SSD1306?) OLED module related issue._

- Use a separate/second I2C bus (with different IO pins) of the ESP32 for the display.

- Connect the display via an [I2C bus isolator](https://www.thethingsnetwork.org/forum/t/switch-off-devices-attached-to-board-to-save-energy/30450/13) like [TCA4311A](http://www.ti.com/product/TCA4311A).

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