diff --git a/ToDo.md b/ToDo.md
index c6828f8..624a4f7 100644
--- a/ToDo.md
+++ b/ToDo.md
@@ -7,7 +7,7 @@
   - 3x secondary displays: Monochrome (green?), 28.707x13.94mm (1.26") ~[OLED I2C](https://de.aliexpress.com/item/1005005473564682.html)~ [OLED SPI 7-Pin](https://de.aliexpress.com/item/1005003753680706.html)
   - Tertiary display: 73x21mm (2.99") [1602 Character LCD Green](https://de.aliexpress.com/item/1005007348861991.html) (+ accompanying parallel to I2C Adapter)
 - [ ] which uC?
-     - [ ] what kind of SW?
+     - [T-Energy ESP32-S3](https://lilygo.cc/products/t-energy-s3)
 - [ ] battery + loading circuit
 - [X] NFC reader (ISO 14443-3A) (NXP-NTAG216) (888 Bytes needed!)
 	- [NXP PN532](https://de.aliexpress.com/item/32884787583.html)