add li cr in todolist

variants/xiao_nrf54l15/README.md

@@ -1,5 +1,7 @@
 # MeshCore variant for the Semtech LR2021 Evaluation Kit
 
+The kit hosts a Seeed Studio XIAO nRF54L15 Core Board driving the [Semtech LR2021 transceivers](https://www.semtech.fr/products/wireless-rf/lora-plus/lr2021)
+
 https://wiki.seeedstudio.com/semtech_lr2021_evk_getting_started/
 
 Supports LoRa CSS on 868 MHz and 2.4 GHz bands
@@ -7,7 +9,8 @@ Supports LoRa CSS on 868 MHz and 2.4 GHz bands
 Recommanded channels for ISM2400 (2400-2483 MHz) : 2403 MHz, 2425 MHz, 2479 MHz with DC 100%. [ref1](https://www.semtech.com/uploads/technology/LoRa/phy-layer-2g4.pdf), [ref2](https://github.com/CampusIoT/datasets/tree/main/TourPerret2G4)
 
 ## TODO
-* [ ] floor the bandwith provided by the app on LoRa CSS 2G4 bandwidths (101kHz, 203kHz, 406kHz, 812kHz 1625kHz)
+* [ ] floor the bandwith provided by the app on LoRa CSS 2G4 bandwidths (203kHz, 406kHz, 812kHz 1625kHz?)
+* [ ] add Long Interleaver (Li) Coding Rate for LoRa CSS on 2.4 GHz
 * [ ] support USER button (send advert on double click)
 * [ ] support OLED screen
 * [ ] fix persistence of BLE pairing