Thingy91: Wifi over SPI or UART?

[androbi]

Dear all,

after some customs problems I hope I finally will receive my Thingy 91 tomorrow. I have already installed the toolchain and done some readup on the device for the project I'd like to evaluate. I will need access to a Wifi module and I have found 2 modules with available breakouts: ESP8266 and ATWINC1500. The first is over UART while the second is SPI. For what I could find out on this forum full of good advice both methods should in principle be possible

1) UART over uart1, pins 22-25, which requires removing solder bridges and I loose modem tracing

https://devzone.nordicsemi.com/f/nordic-q-a/52545/receive-external-data-through-uart-on-thingy-91

2) SPI over pin 03-05, deselecting the accelerometer with pin 07 and using pin 10 as CS for the external device.

https://devzone.nordicsemi.com/f/nordic-q-a/66111/asset-tracker---adding-spi-sensor/271405#271405

As I am quite a beginner: Are both ways feasible? Any caveats I should have in mind (besides the 1.8V logic level on the Thingy side)? SPI is probably more complicated to program, I coud only find the st25r3911b library as an example implementation.  I won't need to transfer a lot of data, so transfer speed is not much of a problem.

Any advice greatly appreciated!

[androbi]

Dear Heidi,

thank you very much for your answer! Especially the info about the ATWINC1500 driver and the SPI code example are very interesting, I have not been able to locate these on my own. No more questions, I will try to find a module and start programming ....