SPI with multiple devices attached – Arduino, Heltec WiFi Lora 32 and RFID-RC522
It is possible to attach several sensors (slaves) etc. to one SPI connection that exists on an Arduino or other microcontrollers like the Heltec Wifi Lora 32 (master). As an example have I tested the RFID-RC522 as an common RFID reader/writer on the Heltec development board. (more…)