How can Sensors (SPI) be replaced？

[Schuyler]

Just wondering if it's possible to add an extra sensor (SPI) on the STEVAL-SMARTAG1? Can the SPI sensor be replaced to complete the acquisition?

[Michael GALIZZI]

Hello,

On STEVAL-SMARTAG1 there is no direct access to any SPI lines. Additionally, the only sensor that uses SPI interface is the LIS2DW12: it uses a 3-wire SPI where MISO and MOSI are connected together.

Hope this help. Best regards.

[Schuyler]

Hi @Michael GALIZZI 

Yes, the sensor's circuit is i2c communication. But I want to use three-wire SPI communication to complete the sensor acquisition, what pin should I use to complete the circuit? Doesn't the figure below mean SPI communication?

[John TRAN · Accepted solution]

Hello there,

It is not recommended to modify the smartag board hardware. The traces and landing pads would not survive. Therefore, we prefer that you use the board AS-IS.

Best regards