connection btw modem simcom7000 and nrf52840-dk

[rdmeneze]

HI!
I'm basically new with zephyr and etc. 

I'm developing a project with a nrf52840-dk board and a simcom7000 modem (assembked in a arduino expansion board) and basically I don't know how to configure the devicetree. The modem is very similar to simcom7080 and I think that should be possible to use the same driver to do some tests. 

can someone give me some directions? 

thanks in advance. 

Rafael Dias 

[Simonr]

Hi

From what I can see, the SIM7000 supports both UART and I2C, so I'd recommend using either of those for communication between the nRF52 and SIM7000. You'll need a driver file for the SIM7000 to set this up, which Zephyr/NCS doesn't seem to have by default. If you're not comfortable writing a driver like this on your own and the manufacturers of this device don't have an official C driver for it, I recommend searching for an open source one in GitHub, and using for example the UART driver sample in the Zephyr project to communicate with the SIM7000: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/drivers/uart/echo_bot/README.html. This sample just loops data back, to the nRF52 so you need to use some free pins to connect to SIM7000. 

Best regards,

Simon

[rdmeneze]

There is a very similar modem from SIMCOM: SIM7080. I'd like to start with it before write my own driver for SIM7000 modem.