Hi, I want to read data from hm-trlr-s series 100 mW LoRa Transceiver using nucleo-L011k4 which is a platform using a STM32L011K4T6 microcontroller.. The Transceiver communicates with the MCU through USART interface. when I run the code in debugging mode the recieve buffer does not change and it show zero. when I use STM32F4DISCOVERY board with the Transceiver I can recieve the data. However, by changing the HCLK frequency of STM32F4DISCOVERY from 168MHz which is maximum frequency for it to any frequency below 168MHz I could not take any response from the Transceiver. I should mention here that once I use the Transceiver with nucleo-L011k4 and putting break points at uart transmitting and recieving code I can take the first character of the data that should I take. Is it necessary to use a big MCU like STM32F4DISCOVERY for this small task or can I use nucleo-L011k4. Thank you for your help.