We are trying to integrate the STEVAL-STMODLTE chip into the NRF52 for rapid prototyping.
Trying to interface nrf52840 with the STEVAL-STMODLTE chip via UART. Connecting the RX and TX, and sending the "AT" command after the UART initializes, the modem does not respond.
The question is, am I missing something on the connection side? ( TX , RX , Ground ) Between the MCU (nrf52) and the STEVAL-STMODLTE chip? i.e. apart from RX and TX if other pins also need to be connected?
I'm sure I'm missing something simpler, we tried the same way using MCU(nrf52) with an STM32 and it worked fine.
Could you help me please ? Thanks in advance.
By Information, I configured the voltage level GPIO at 1.8v and I can wakeup the modem using PWRKEY Pin
Best regards,
