Customer:
I’m working on an RC project with a Dasduino CORE and an Adafruit LORA module (Adafruit RFM96W LoRa Radio Transceiver Breakout - 433 MHz [RadioFruit] : Adafruit Industries, Unique & fun DIY electronics and kits). The Adafruit wiring instructions (Arduino Wiring | Adafruit RFM69HCW and RFM9X LoRa Packet Radio Breakouts | Adafruit Learning System) specify that for Arduino Uno the SS/CS, MOSI, MISO, and SCLK pins are 10, 11, 12, and 13 respectively.
According to the Dasduino CORE diagram (https://soldered.com/productdata/2022/04/Dasduino-CORE.png), it appears SCLK is on pin 8 (which I assume is CLK0). However, when I use pin 8, the Adafruit test code (RFM9X Test | Adafruit RFM69HCW and RFM9X LoRa Packet Radio Breakouts | Adafruit Learning System) does not work. The code only works if I use pin 13, despite pin 13 not being labelled as SCLK in the diagram.
Can you clarify if the Dasduino CORE diagram is correct? Am I misunderstanding it? Do the SPI pin numbers match those of the Arduino Uno?
Originally submitted via email support on 1 July 2025. Migrated to the forum for community visibility.