3 files changed, 153 insertions, 0 deletions
diff --git a/src/app/wetterstation/Makefile.inc b/src/app/wetterstation/Makefile.inc
new file mode 100644
index 0000000..2cb8a42
--- /dev/null
+++ b/src/app/wetterstation/Makefile.inc
@@ -0,0 +1 @@
+loop ?= 1
diff --git a/src/app/wetterstation/client.py b/src/app/wetterstation/client.py
new file mode 100755
index 0000000..5bc2afc
--- /dev/null
+++ b/src/app/wetterstation/client.py
@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+
+import numpy as np
+import re
+import requests
+import serial
+import serial.threaded
+import sys
+import time
+
+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__':
+
+    got_data = False
+    step = 0
+
+    def parse_line(line):
+
+        global got_data
+
+        match = re.match('Anemometer Count = ([^ ]+)', line)
+        if match:
+            got_data = True
+            wind_clicks = float(match.group(1))
+            windspeed_kmh = wind_clicks * 2.4 / 10
+            requests.post('http://influxdb:8086/write?db=sensors', data='anemometer,area=hm17_,location=balkon windspeed_kmh={}'.format(windspeed_kmh))
+
+    monitor = SerialMonitor('/dev/serial/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.1:1.0-port0', 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()
diff --git a/src/app/wetterstation/main.cc b/src/app/wetterstation/main.cc
new file mode 100644
index 0000000..2c47d78
--- /dev/null
+++ b/src/app/wetterstation/main.cc
@@ -0,0 +1,44 @@
+#include "arch.h"
+#include "driver/gpio.h"
+#include "driver/stdout.h"
+
+#include <avr/interrupt.h>
+
+volatile uint16_t anemometer_count = 0;
+
+void loop(void)
+{
+	static uint8_t loop_count = 0;
+	static uint16_t anemometer_copy;
+	if (++loop_count == 10) {
+
+		cli();
+		anemometer_copy = anemometer_count;
+		anemometer_count = 0;
+		sei();
+
+		kout << "Anemometer Count = " << anemometer_copy << endl;
+		loop_count = 0;
+	}
+}
+
+int main(void)
+{
+	arch.setup();
+	gpio.setup();
+	kout.setup();
+
+	gpio.output(GPIO::pd2, 0);
+	gpio.input(GPIO::pd3, 1);
+
+	EICRA = _BV(ISC11);
+	EIMSK = _BV(INT1);
+
+	arch.idle_loop();
+
+	return 0;
+}
+
+ISR(INT1_vect) {
+	anemometer_count++;
+}