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[教程] 【智控万物】CodeLab Adapter控制树莓派GPIO

【前言】操作树莓派 GPIO 的工具里，gpiozero尤为出色，因其具有很好的可理解性。
【准备】
参考：https://adapter.codelab.club/extension_guide/rpi_gpio/
【查看引脚】
gpio用的mode是wPi，而gpiozero用的是BCM，所以pin17对应wpi的pin0

【智控万物】CodeLab Adapter控制树莓派GPIO图1

【查看代码】
node_raspberrypi.py
[mw_shl_code=python,false]'''
pip install gpiozero pigpio --user
# docs: https://gpiozero.readthedocs.io/en/stable/remote_gpio.html
'''
from io import StringIO
import contextlib
import sys
import time
import os  # env

from loguru import logger
from codelab_adapter_client import AdapterNode
from codelab_adapter_client.utils import get_or_create_node_logger_dir

#ERO_PIN_FACTORY=pigpio PIGPIO_ADDR= "raspberrypi.local"# 192.168.1.3
#os.environ["GPIOZERO_PIN_FACTORY"] = "pigpio"
#os.environ["PIGPIO_ADDR"] = "raspberrypi.local"

from gpiozero import LED
from gpiozero.pins.pigpio import PiGPIOFactory
from time import sleep

node_logger_dir = get_or_create_node_logger_dir()
debug_log = str(node_logger_dir / "debug.log")
logger.add(debug_log, rotation="1 MB", level="DEBUG")

class RPINode(AdapterNode):
def __init__(self):
      super().__init__(logger=logger)
      self.NODE_ID = self.generate_node_id(__file__)
      #self.factory = PiGPIOFactory(host='127.0.0.1')  # 192.168.1.3
      self.factory = PiGPIOFactory(host='raspberrypi.local')  # 192.168.1.3
      # 反馈连接成功，与失败
      self.led = LED(17, pin_factory=self.factory)

def run_python_code(self, code):
      try:
         output = eval(code, {"__builtins__": None}, {
            "led": self.led,
            "factory": self.factory
         })
      except Exception as e:
         output = e
      return output

def extension_message_handle(self, topic, payload):
      self.logger.info(f'code: {payload["content"]}')
      message_id = payload.get("message_id")
      python_code = payload["content"]
      output = self.run_python_code(python_code)
      payload["content"] = str(output)
      message = {"payload": payload}
      self.publish(message)

def run(self):
      "避免插件结束退出"
      while self._running:
         time.sleep(0.5)

if __name__ == "__main__":
try:
      node = RPINode()
      node.receive_loop_as_thread()
      node.run()
except KeyboardInterrupt:
      # node.logger.debug("KeyboardInterrupt") # work mac
      if node._running:
         node.terminate()  # Clean up before exiting.
[/mw_shl_code]Adapter Node，可参考：https://adapter.codelab.club/dev_guide/Adapter-Node/
【CodeLab Scratch代码】
【智控万物】CodeLab Adapter控制树莓派GPIO图2