1 files changed, 185 insertions, 0 deletions
diff --git a/src/app/bme680-max44009-logger/bme680-max44009-client.py b/src/app/bme680-max44009-logger/bme680-max44009-client.py
new file mode 100755
index 0000000..3d836f1
--- /dev/null
+++ b/src/app/bme680-max44009-logger/bme680-max44009-client.py
@@ -0,0 +1,185 @@
+#!/usr/bin/env python3
+
+import json
+import paho.mqtt.client as mqtt
+import re
+import requests
+import serial
+import serial.threaded
+import sys
+import time
+
+location = "wohnzimmer"
+
+
+class SerialReader(serial.threaded.Protocol):
+    """
+    Character- to line-wise data buffer for serial interfaces.
+
+    Reads in new data whenever it becomes available and exposes a line-based
+    interface to applications.
+    """
+
+    def __init__(self, callback):
+        """Create a new SerialReader object."""
+        self.callback = callback
+        self.recv_buf = ""
+
+    def __call__(self):
+        return self
+
+    def data_received(self, data):
+        """Append newly received serial data to the line buffer."""
+        try:
+            str_data = data.decode("UTF-8")
+            self.recv_buf += str_data
+
+            # We may get anything between \r\n, \n\r and simple \n newlines.
+            # We assume that \n is always present and use str.strip to remove leading/trailing \r symbols
+            # Note: Do not call str.strip on lines[-1]! Otherwise, lines may be mangled
+            lines = self.recv_buf.split("\n")
+            if len(lines) > 1:
+                self.recv_buf = lines[-1]
+                for line in lines[:-1]:
+                    self.callback(str.strip(line))
+
+        except UnicodeDecodeError:
+            pass
+            # sys.stderr.write('UART output contains garbage: {data}\n'.format(data = data))
+
+
+class SerialMonitor:
+    """SerialMonitor captures serial output for a specific amount of time."""
+
+    def __init__(self, port: str, baud: int, callback):
+        """
+        Create a new SerialMonitor connected to port at the specified baud rate.
+
+        Communication uses no parity, no flow control, and one stop bit.
+        Data collection starts immediately.
+        """
+        self.ser = serial.serial_for_url(port, do_not_open=True)
+        self.ser.baudrate = baud
+        self.ser.parity = "N"
+        self.ser.rtscts = False
+        self.ser.xonxoff = False
+
+        try:
+            self.ser.open()
+        except serial.SerialException as e:
+            sys.stderr.write(
+                "Could not open serial port {}: {}\n".format(self.ser.name, e)
+            )
+            sys.exit(1)
+
+        self.reader = SerialReader(callback=callback)
+        self.worker = serial.threaded.ReaderThread(self.ser, self.reader)
+        self.worker.start()
+
+    def close(self):
+        """Close serial connection."""
+        self.worker.stop()
+        self.ser.close()
+
+
+if __name__ == "__main__":
+
+    mqtt = mqtt.Client()
+    mqtt.connect("mqtt.derf0.net")
+
+    step = 0
+    got_data = False
+    max_accel = 0
+    max_magnet = 0
+    vcc = 0
+    temperature = 0
+    humidity = 0
+    pressure = 0
+    gas = 0
+    brightness = 0
+
+    def parse_line(line):
+
+        global got_data
+        global vcc
+        global temperature
+        global humidity
+        global pressure
+        global gas
+        global brightness
+
+        match = re.match("BME680 temperature: ([^ ]+)", line)
+        if match:
+            temperature = float(match.group(1))
+
+        match = re.match("BME680 humidity: ([^ ]+)", line)
+        if match:
+            humidity = float(match.group(1))
+
+        match = re.match("BME680 pressure: ([^ ]+)", line)
+        if match:
+            pressure = float(match.group(1))
+
+        match = re.match("BME680 gas resistance: ([^ ]+)", line)
+        if match:
+            gas = match.group(1)
+
+        match = re.match("VCC: ([^ ]+)", line)
+        if match:
+            vcc = int(match.group(1))
+
+        match = re.match("MAX44009: ([^ ]+)", line)
+        if match:
+            got_data = True
+            brightness = float(match.group(1))
+
+            requests.post(
+                "http://influxdb.derf0.net:8086/write?db=sensors",
+                f"bme680,area=hm17,location={location} temperature_celsius={temperature},humidity_relpercent={humidity},pressure_hpa={pressure},air_quality_ohm={gas}",
+            )
+            requests.post(
+                "http://influxdb.derf0.net:8086/write?db=sensors",
+                f"max44009,area=hm17,location={location} illuminance_lux={brightness}",
+            )
+
+            mqtt.publish(
+                f"sensor/hm17/{location}/brightness_lux",
+                brightness
+            )
+            mqtt.publish(
+                f"sensor/hm17/{location}/bme680",
+                json.dumps(
+                    {
+                        "temperature_celsius": round(temperature, 1),
+                        "humidity_percent": round(humidity, 1),
+                        "pressure_hpa": pressure,
+                        "iaq_ohm": gas,
+                    }
+                ),
+            )
+
+            temperature = None
+            humidity = None
+            pressure = None
+            gas = None
+            vcc = None
+            brightness = None
+
+    monitor = SerialMonitor("/dev/ttyUSB0", 57600, parse_line)
+
+    try:
+        while True:
+            time.sleep(5)
+
+            step += 1
+
+            if step == 4:
+                if not got_data:
+                    print("Error: received no data for 20 seconds", file=sys.stderr)
+                    sys.exit(1)
+                got_data = False
+                step = 0
+
+    except KeyboardInterrupt:
+        monitor.close()
+        mqtt.disconnect()