Raspberry Pi Zero W 0.91inch OLED

Raspberry Pi turns off SPI and I2C functions by default. If you write SPI programs, but the SPI module is not turned on, the following errors may occur:

ERROR: could not insert 'spi_bcm2708': No such device

The following is a simple explanation on how to open SPI function. Of course, it is the same to open other functions.

Input at terminal

sudo raspi-config

Command, and then operate according to the following sequence. After the configuration is completed, restart the raspberry pi to take effect.

If the SPI program runs with the following error

Unable to open SPI device: No such file or directory

It is possible that the SPI module was not imported successfully. Use the lsmod command to see whether the SPI module was successfully imported

If the words shown in the figure above appear, it indicates that the I2C and SPI modules are imported successfully. Otherwise, you can perform the configuration again and restart the system.

If the execution of I2C related procedures, the following errors occur

Unable to open I2C device: No such file or directory

You can see smod command i2c_bmc2708, but no i2c_dev, the following processing is required

sudo nano /etc/modules #Open files with nano

Then add
i2c_dev

Press Ctrl + X to exit editing, enter y to save the content, and then restart.

As shown in the figure below:

TAG： 3D Display Raspberry Pi 7.5 inch e-Paper link (H) RYBW 800x480 For Arduino / Jetson Nano / STM32 Raspberry Pi 1.54inch LCD Bookworm-Desktop Display and Touch Install Espressif IDF Plugin Tutorial User Guide Raspberry Pi 21.5inch FHD LCD 1080x1920 Capacitive TouchScreen Display For Raspberry Pi/Jetson Nano/ Pi5 Pure-Copper Active Cooler Raspberry Pi 5 inch DSI MIPI Display LCD (D) Capacitive TouchScreen 720x1280 Computer USB Monitor Screen Raspberry Pi Display Driver Board Servo PWM motor WP5320 WP5335 35/20KG.CM 180° PWM digital servo double ball bearings DeepSeek XiaoZhi AI Chat Robot ESP32-S3 1.54 inch LCD N16R8 MUMA Development Board Display Screen Wifi Weather Station TimeClock Raspberry Pi 3.5 inch e-Paper link (G) RYBW 384x184 For Arduino / Jetson Nano / STM32 10-Axis DOF ROS IMU (A) Sensor UART ARM 32 DSP Processor BLE 5.3 Bluetooth / Accelerometer / Gyroscope / Magnetometer / Temperature & Pressure Raspberry Pi 5 DSI Bookworm ESP32 S3 AI 0.85inch Development Board 0.85 inch DeepSeek RGB surround light Raspberry Pi USB Global Shutter Camera 1MP OV9281 120fps Black/White 120fps also For Jeston RDK SpotPear Raspberry Pi 5 Raspberry Pi 7 inch HMI industrial DSI Display LCD 7inch TouchScreen Computer 720×1280 ESP32 C3 Round LCD Development Board Electronic EYE 0.71 inch Display Watch Screen GC9A01 160x160

Raspberry Pi Zero W 0.91inch OLED - RPI SPI and IIC User Guide

Raspberry Pi 7 inch DSI MIPI LCD TouchScreen Display 7inch 720x1280 For Luckfox Lyra RK3506/ESP32-P4/Luckfox Omni3576