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demo rig image

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GPIO-examples.md
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@ -129,11 +129,16 @@ $ source env/bin/activate
(env) $ pip install --upgrade pip
(env) $ pip install --upgrade pimoroni-bme280
(env) $ pip install --upgrade luma.oled
# Not yet used in demo: (env) $ pip install --upgrade lgpio
(env) $ pip install --upgrade lgpio # <- Not yet used in demo
# Run the demo
(env) $ python GPIO-demo.py
```
## Hardware
![my demo rig](reference/GPIO-demo-setup.jpg)
This is my test setup; A bme280 and SSD1306 OLED on the I2C bus, a blue LED is on a PWM pin and a pushbutton on a free digital IO pin. The MQ Pro itself is hidden underneath the (blue) LoRa HAT.
#### Work In Progress ####
Demo runs but still needs expanding to demo lgpio and pwm control

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