Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By SomeGuy
#84759 I want to connect a OLED panel & 4 SPI devices to a NodeMCU ESP8266 board. The OLED panel is connected to the SDA(GPIO 4) and SCL(GPIO 5) pins. The data line(GPIO 12) and clock line(GPIO 14) are common. I see the possible choices for chip select pins to be the other free GPIO pins.

1) GPIO 15

2) GPIO 16

3) GPIO 0

4) GPIO 2

5) GPIO 13

6) GPIO 3

7) GPIO 1

Now with these options laid out, how do we choose which of these pins can be used as a chip select. The SPI device I am using is the MAX31855 thermocouple amplifier.