Update README

README.md

@@ -1,6 +1,6 @@
 [![Documentation Status](https://readthedocs.org/projects/terahz/badge/?version=latest)](https://terahz.readthedocs.io/en/latest/?badge=latest)
 # <img alt="TeraHz logo" src="docs/imgs/logo-sq.png" width="200px"> TeraHz
-
+*This project is currently at a standstill because SparkFUN stopped making one of the board this project needs. TeraHz will return in a better form some day!*
 *Za slovensko različico se odpravite na <http://git.sckr-lab.tk/kristjank/TeraHz>*
 
 TeraHz is a low-cost portable spectrometer based on Raspberry Pi and a few

backend/app.py

@@ -8,7 +8,7 @@ app = Flask(__name__)
 @app.route('/data')
 def sendData():
     '''Responder function for /data route'''
-    s = sensors.Spectrometer(path='/dev/serial0', baudrate=115200, tout=1)
+    s = sensors.Spectrometer(path='/dev/serial0')
     u = sensors.UVSensor()
     l = sensors.LxMeter()
     response = jsonify([s.getData(), l.getData(), u.getABI()])

backend/sensors.py

@@ -6,8 +6,13 @@ import serial as ser
 import pandas as pd
 import smbus2
 
+
+
+
+
 class Spectrometer:
     '''Class representing the AS7265X specrometer'''
+
     def initializeSensor(self):
         '''confirm the sensor is responding and proceed\
          with spectrometer initialization'''
@@ -23,8 +28,7 @@ class Spectrometer:
             if rstring == 'ERROR':
                 raise Exception  # sensor is in error state
         except:
-            raise Exception(
+            raise Exception('No AT command response')
-                'An exception ocurred when performing spectrometer handshake')
 
     def setParameters(self, parameters):
         '''applies the parameters like LED light and gain to the spectrometer'''
@@ -53,8 +57,7 @@ class Spectrometer:
                 self.serialObject.write('ATLED3={}\n'.format(led).encode())
                 self.serialObject.readline()
         except:
-            raise Exception(
+            raise Exception('Error setting spectrometer parameters')
-                'An exception occured during spectrometer initialization')
 
     def getData(self):
         '''Returns spectral data in a pandas DataFrame.'''
@@ -62,8 +65,7 @@ class Spectrometer:
             self.serialObject.write(b'ATCDATA\n')
             rawresp = self.serialObject.readline().decode()
         except:
-            raise Exception(
+            raise Exception('Error polling spectrometer data')
-                'An exception occurred when polling for spectrometer data')
         else:
             responseorder = list('RSTUVWGHIJKLABCDEF')
             realorder = list('ABCDEFGHRISJTUVWKL')
@@ -78,14 +80,14 @@ class Spectrometer:
         try:
             self.serialObject = ser.Serial(path, baudrate, timeout=tout)
         except:
-            raise Exception(
+            raise Exception('Error opening serial port: {}'.format(path))
-                'An exception occured when opening the serial port at {}'.format(path))
         else:
             self.initializeSensor()
 
 
 class LxMeter:
     '''Class representing the APDS-9301 digital photometer.'''
+
     def __init__(self, busNumber=1, addr=0x39):
         self.addr = addr
         try:
@@ -93,14 +95,14 @@ class LxMeter:
             self.bus = smbus2.SMBus(busNumber)
         except:
             raise Exception(
-                'An exception occured opening the SMBus {}'.format(self.bus))
+                'Error opening SMBus {}'.format(self.bus))
 
         try:
             self.bus.write_byte_data(
                 self.addr, 0xa0, 0x03)  # enable the sensor
             self.setGain(16)
         except:
-            raise Exception('An exception occured when enabling lux meter')
+            raise Exception('Error enabling lux meter')
 
     def setGain(self, gain):
         '''Set the sensor gain. Either 1 or 16.'''
@@ -109,15 +111,13 @@ class LxMeter:
                 temp = self.bus.read_byte_data(self.addr, 0xa1)
                 self.bus.write_byte_data(self.addr, 0xa1, 0xef & temp)
             except:
-                raise Exception(
+                raise Exception('Error setting lux meter gain')
-                    'An exception occured when setting lux meter gain')
         if gain == 16:
             try:
                 temp = self.bus.read_byte_data(self.addr, 0xa1)
                 self.bus.write_byte_data(self.addr, 0xa1, 0x10 | temp)
             except:
-                raise Exception(
+                raise Exception('Error setting lux meter gain')
-                    'An exception occured when setting lux meter gain')
         else:
             raise Exception('Invalid gain')
 
@@ -176,6 +176,7 @@ class LxMeter:
 
 class UVSensor:
     '''Class representing VEML6075 UVA/B meter'''
+
     def __init__(self, bus=1, addr=0x10):
         self.addr = addr
         try:
@@ -189,13 +190,14 @@ class UVSensor:
             self.bus.write_byte_data(self.addr, 0x00, 0b00010000)
 
             # trigger a measurement to prevent bus errors at first read
-            self.bus.write_byte_data(self.addr, 0x00, 0b00010010) # UV_AF=1
+            self.bus.write_byte_data(self.addr, 0x00, 0b00010010)  # UV_AF=1
-            self.bus.write_byte_data(self.addr, 0x00, 0b00010110) # UV_TRIG=1
+            self.bus.write_byte_data(self.addr, 0x00, 0b00010110)  # UV_TRIG=1
-            self.bus.write_byte_data(self.addr, 0x00, 0b00010000) # normal mode
+            self.bus.write_byte_data(
+                self.addr, 0x00, 0b00010000)  # normal mode
 
         except:
             raise Exception(
-                'An exception occured when initalizing the UV Sensor')
+                'Error initalizing the UV Sensor')
 
     def getABI(self):
         '''Calculates the UVA and UVB irradiances,
@@ -208,14 +210,14 @@ class UVSensor:
             c1 = self.bus.read_word_data(self.addr, 0x0a)
             c2 = self.bus.read_word_data(self.addr, 0x0b)
         except:
-            raise Exception('An exception occured when fetching raw UV data')
+            raise Exception('Error fetching raw UV data')
         # Refer to Vishay app note 84339 and Sparkfun VEML6075 documentation.
         # The computed values may be negative if UV is vastly weaker than
         # visible and IR light. This is not a bug!
 
         a = (aRaw - 2.22 * c1 - 1.33 * c2) * 1.06
         b = (bRaw - 2.95 * c1 - 1.74 * c2) * 0.48
-        i = (a + b) / 2 # calculate UV index
+        i = (a + b) / 2  # calculate UV index
         return [a, b, i]
 
     def on(self):
@@ -226,7 +228,7 @@ class UVSensor:
             self.bus.write_byte_data(self.addr, 0x00, 0x10)
         except:
             raise Exception(
-                'An exception occured when turning the UV sensor on')
+                'Error turning the UV sensor on')
 
     def off(self):
         '''Shuts the UV sensor down.'''
@@ -236,4 +238,4 @@ class UVSensor:
             self.bus.write_byte_data(self.addr, 0x00, 0x11)
         except:
             raise Exception(
-                'An exception occured when shutting the UV sensor down')
+                'Error shutting the UV sensor down')

backend/storage.py

@@ -1,37 +0,0 @@
-# storage.py - storage backend for TeraHz
-'''TeraHz storage backend'''
-# Copyright Kristjan Komloši 2019
-# All code in this file is licensed under the ISC license,
-# provided in LICENSE.txt
-
-
-import sqlite3
-class jsonStorage:
-    '''Class for simple sqlite3 database of JSON entries'''
-    def __init__(self, dbFile):
-        '''Storage object constructor. Argument is filename'''
-        self.db = sqlite3.connect(dbFile)
-
-    def listJSONs(self):
-        '''Returns a list of all existing entries.'''
-        c = self.db.cursor()
-        c.execute('SELECT * FROM storage')
-        result = c.fetchall()
-        c.close()
-        return result
-
-    def storeJSON(self, jsonString, comment):
-        '''Stores a JSON entry along with a timestamp and a comment.'''
-        c = self.db.cursor()
-        c.execute(('INSERT INTO storage VALUES (datetime'
-                   '(\'now\', \'localtime\'), ?, ?)'), (comment, jsonString))
-        c.close()
-        self.db.commit()
-
-    def retrieveJSON(self, timestamp):
-        '''Retrieves a JSON entry. Takes a timestamp string'''
-        c = self.db.cursor()
-        c.execute('SELECT * FROM storage WHERE timestamp = ?', (timestamp,))
-        result = c.fetchall()
-        c.close()
-        return result

backend/terahz.fcgi

@@ -1,7 +0,0 @@
-#!/usr/bin/python3
-# Minimal flup configuration for Flask
-from flup.server.fcgi import WSGIServer
-from app import app
-
-if __name__ == '__main__':
-    WSGIServer(app, bindAddress='/var/www/api/terahz.sock').run()

etcs/install.sh

@@ -1,4 +1,4 @@
-# install.sh - install TeraHz onto a Raspbian or DietPi installation
+# install.sh - install TeraHz onto a Raspbian Lite instance
 cd `dirname $0`
 
 apt -y update
@@ -6,15 +6,16 @@ apt -y full-upgrade
 apt install -y python3 python3-pip lighttpd dnsmasq hostapd libatlas-base-dev
 pip3 install numpy pandas flask smbus2 pyserial gunicorn
 
-cp -R hostapd/ /etc
+cp -R hostapd/* /etc/hostapd/
 chmod +rx /etc/hostapd/edit_ssid.sh
-cp dnsmasq.conf /etc
+cp dnsmasq.conf /etc/
 
-cp rc.local /etc
+cp rc.local /etc/
 chmod +rx /etc/rc.local
 cp interfaces-terahz /etc/network/interfaces.d/
 
 cp -R ../frontend/* /var/www/html/
+
 mkdir -p /usr/local/lib/terahz
 cp -R ../backend/* /usr/local/lib/terahz
 

frontend/index.html

@@ -26,8 +26,8 @@
 
   <div class="container">
     <button id="update" onclick="updateData()" class="btn btn-primary">Get data</button>
-    <button id="download" class="btn btn-primary">Download</button>
+    <!-- <button id="download" class="btn btn-primary">Download</button>
-    <button id="debug" class="btn btn-danger">DEBUG</button>
+    <button id="debug" class="btn btn-danger">DEBUG</button> -->
   </div>
 
   <div class="container">

utils/getcdata.py

@@ -1,45 +0,0 @@
-# getcdata.py - fetch the calibrated data from the AS7265x module
-# All code in this file is licensed under the ISC license, provided in LICENSE.txt
-
-import serial as ser
-import pandas as pd
-import numpy as np
-import matplotlib.pyplot as plt
-import time
-#global variables
-uartpath = '/dev/ttyUSB0'
-uartbaud = 115200
-uarttout = 5
-
-wl = [410, 435, 460, 485, 510, 535, 560, 585, 610, 645, 680, 705, 730, 760, 810, 860, 900, 940]
-responseorder = [i for i in 'RSTUVWGHIJKLABCDEF'] # works, do NOT touch!
-realorder = [i for i in 'ABCDEFGHRISJTUVWKL']
-
-
-print('getcdata')
-print('This utility is part of the TeraHz project')
-
-wavelens = pd.Series(realorder)
-
-
-plt.ion()
-win = plt.figure()
-spectrum=win.add_subplot(111)
-
-
-with ser.Serial(uartpath, uartbaud, timeout=uarttout) as sensor:
-    while True:
-        sensor.write(b'ATCDATA\n')
-        rawresp = sensor.readline().decode()
-        # parses, calculates and saves the data
-        response = pd.Series([float(i)/35.0 for i in rawresp[:-3].split(',')], index=responseorder)
-        data = pd.DataFrame(response, index=realorder, columns = ['uW/cm^2']) # puts data into a DataFrame
-        data.insert(0, 'wavelenght', wl) #inserts a legend
-        print(data)
-        spectrum.cla()
-        spectrum.plot(data['wavelenght'], data['uW/cm^2'])
-        spectrum.set_xlabel('Valovna dolžina')
-        spectrum.set_ylabel('uW/cm2')
-        win.canvas.draw()
-
-        time.sleep(0.1)

utils/smbus-test.py

@@ -1,12 +0,0 @@
-import smbus2
-
-bus = smbus2.SMBus(1)
-
-result = bus.read_byte_data(0x39, 0x8a)
-print('LUX Meter ID = {}'.format(result))
-
-result = bus.read_word_data(0x10, 0x0c)
-print('UV sensor ID = {}'.format(result))
-
-result = bus.read_word_data(0x39, 0xec)
-print('LUX chan 0 = {}'.format(result))

utils/tinter-demo.py

@@ -1,22 +0,0 @@
-from serial import Serial
-import tkinter as tk
-import pandas as pd
-
-from matplotlib.backends.backend_tkagg import (FigureCanvasTkAgg, NavigationToolbar2Tk)
-from matplotlib.backend_bases import key_press_handler
-from matplotlib.figure import Figure
-
-uartpath = '/dev/ttyUSB0'
-uartbaud = 115200
-uarttout = 5
-
-wl = [410, 435, 460, 485, 510, 535, 560, 585, 610, 645, 680, 705, 730, 760, 810, 860, 900, 940]
-responseorder = [i for i in 'RSTUVWGHIJKLABCDEF'] # works, do NOT touch!
-realorder = [i for i in 'ABCDEFGHRISJTUVWKL']
-
-root = tk.Tk()
-root.wm_title('TeraHz Demo')
-
-fig = Figure(figsize=(5, 4), dpi=100)
-plot = fig.add_subplot(111)
-canvas = FigureCanvasTkAgg(fig, master=root)