Hi everyone,
I’m trying to build the **smallest possible STM32WLE5JC LoRa node** (no external LoRa module, only the integrated radio) that:
- can be programmed with ST-LINK (6 pogo pads)
- can send/receive LoRa on 868 MHz properly
- ultra-low power (deep sleep <1 μA)
I made a very simple schematic in EasyEDA (attached JSON + PDF) but I’m not 100 % sure it’s correct:
- I added the 32.768 kHz crystal
- I added a 32 MHz TCXO
- BOOT0 and NRST with pull-up/down
- decoupling caps
- programming pads
But I’m afraid I missed something important (RF matching? SMPS? proper decoupling? TCXO connection?)
Could someone please check my design and tell me:
1. What is wrong / missing?
2. How to make it really minimal?
3. Add the correct 868 MHz RF matching + PCB antenna?
