From 3204bf9a3f0148c1c4d12962e9e84774181de5cf Mon Sep 17 00:00:00 2001
From: Thomas Klaehn <tkl@blackfinn.de>
Date: Sat, 21 May 2022 14:20:54 +0200
Subject: [PATCH] Initial commit

---
 relay_rpc.service | 10 ++++++++
 relay_rpc/main.py | 58 +++++++++++++++++++++++++++++++++++++++++++++++
 setyp.py          | 43 +++++++++++++++++++++++++++++++++++
 3 files changed, 111 insertions(+)
 create mode 100644 relay_rpc.service
 create mode 100644 relay_rpc/main.py
 create mode 100644 setyp.py

diff --git a/relay_rpc.service b/relay_rpc.service
new file mode 100644
index 0000000..4009365
--- /dev/null
+++ b/relay_rpc.service
@@ -0,0 +1,10 @@
+[Unit]
+Description=Relay rpc service
+After=multi-user.target
+
+[Service]
+Type=idle
+ExecStart=/usr/local/bin/relay_rpc
+
+[Install]
+WantedBy=multi-user.target
diff --git a/relay_rpc/main.py b/relay_rpc/main.py
new file mode 100644
index 0000000..688f4fa
--- /dev/null
+++ b/relay_rpc/main.py
@@ -0,0 +1,58 @@
+"""Entry point"""
+#!/usr/bin/env python
+
+import logging
+import sys
+
+from xmlrpc.server import SimpleXMLRPCServer
+
+import RPi.GPIO as GPIO
+
+LOG_LEVEL = logging.ERROR
+LOG_FILE = "/var/log/relay_rpc.log"
+LOG_FORMAT = "%(asctime)s %(levelname)s %(message)s"
+
+HOST = "0.0.0.0"
+PORT = 64001
+
+GPIOS = [26, 20, 21]
+
+
+def switch_relay(relay: int, state: bool):
+    """Switch relay"""
+    pin = int(GPIOS[relay - 1])
+    log = logging.getLogger()
+    log.info("switching relay %s (pin %s) %s", relay, pin, state)
+    GPIO.output(pin, not state)
+
+
+def init_relays():
+    """Init relays"""
+    GPIO.setwarnings(False)
+    GPIO.setmode(GPIO.BCM)
+    for pin in GPIOS:
+        GPIO.setup(pin, GPIO.OUT)
+        GPIO.output(pin, True)
+
+
+def main():
+    """Entry point"""
+    logging.basicConfig(format=LOG_FORMAT, level=LOG_LEVEL, filename=LOG_FILE)
+    # logging.basicConfig(format=LOG_FORMAT, level=LOG_LEVEL)
+
+    log = logging.getLogger()
+
+    init_relays()
+
+    server = SimpleXMLRPCServer((HOST, PORT), allow_none=True)
+
+    server.register_function(switch_relay, 'switch_relay')
+
+    log.info('Control-c to quit')
+    server.serve_forever()
+    log.info("Shutting down...")
+    log.info("...done. Exiting...")
+
+
+if __name__ == '__main__':
+    sys.exit(main())
diff --git a/setyp.py b/setyp.py
new file mode 100644
index 0000000..5671aee
--- /dev/null
+++ b/setyp.py
@@ -0,0 +1,43 @@
+
+import os
+import shutil
+import stat
+from setuptools import setup
+from setuptools.command.install import install
+
+NAME = 'relay_rpc'
+VERSION = '1'
+AUTHOR = 'Thomas Klaehn'
+EMAIL = 'tkl@blackfinn.de'
+PACKAGES = [NAME]
+REQUIRES = ['RPi.GPIO']
+
+SERVICEDIR = "/lib/systemd/system"
+DAEMON_START_SCRIPT = os.path.join(SERVICEDIR, NAME +".service")
+
+LOGFILE = "/var/log/" + NAME + ".log"
+
+ENTRY_POINTS = {
+    'console_scripts': [
+        'relay_rpc = relay_rpc.main:main'
+    ]
+}
+
+class Install(install):
+    def run(self):
+        install.run(self)
+        os.makedirs(SERVICEDIR, exist_ok=True)
+        shutil.copyfile(NAME + '.service', os.path.join(SERVICEDIR, DAEMON_START_SCRIPT))
+        os.chmod(DAEMON_START_SCRIPT, stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH)
+
+        try:
+            open(LOGFILE, 'r')
+        except FileNotFoundError:
+            os.makedirs(os.path.dirname(LOGFILE), exist_ok=True)
+            open(LOGFILE, 'x')
+            os.chmod(LOGFILE, stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IWGRP | stat.S_IROTH | stat.S_IWOTH)
+
+
+setup(name=NAME, version=VERSION, long_description=__doc__, author=AUTHOR, author_email=EMAIL,
+      packages=PACKAGES, zip_safe=False, install_requires=REQUIRES, entry_points=ENTRY_POINTS,
+      cmdclass={'install': Install})