Hi everyone,
I’m still learning to use RAK Wisblock modules.
Currently, I’m trying to understand whether the wireless block RAK2305 can change it’s communicate method for AT command so that instead of using UART1 or UART0 change it to SPI or I2C.
From what I understand, it should be possible by following the steps at SDIO-SPI. However, from what I’ve seen, it seems to use the SDIO pins to make a pseudo SPI communication and we do not have access to all the necessary pins, namely the MISO, CS and GPIO INT pins, as shown here.
So far, I haven´t found anything about using the SPI or I2C available drivers directly without having to modify and make my own AT firmware.
Does anyone know if it’s possible without having to make big changes in the firmware?
The RAK2305 is running the Espressif AT command firmware and it can only communicate with AT commands over UART.
If you need another communication option, you will have to compile your own version of the Espressif firmware (I think it is open source) that supports I2C or SPI.
But then you still need a new library on the WisBlock Core module to talk to the RAK2305 through SPI or I2C.
Summary
Maybe possible
Big effort on both the RAK2305 and WisBlock Core module.
Okay, thank you for your answer