I am currently having an ADC(MCP3008) connected to a rpi3, using the following wiring map, in order to read data from analog sensors.
MCP3008 -> RPI3 VDD -> 3.3V VREF -> 3.3V AGND -> GND CLK -> #18 DOUT -> #23 DIN -> #24 CS -> #25 DGND -> GND
Now what I am trying to do, is to also connect a LoRa RFM95W on the same rpi3, in order to transmit these data to a LoRa Gateway. The wiring for the LoRa node transmitter is the following.
RFM95W -> RPI3 3.3V -> #1 GND -> #6 DI00 -> #7 RST -> #11 NSS -> #22 MOSI -> #19 MISO -> #21 SCK -> #23
So the two wiring maps seem to have nothing in common except from SCK on RPI pin #23. (And the power which is not a problem).
How should I wire the ADC and the transmitter on pin #23, should I follow that Daisy-chained SPI bus connection or should I plug both of them directly on pin #23?