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247
airsensor.c
Executable file
247
airsensor.c
Executable file
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/*
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* airsensor.c
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*
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* Original source: Rodric Yates http://code.google.com/p/airsensor-linux-usb/
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* Modified source: Ap15e (MiOS) http://wiki.micasaverde.com/index.php/CO2_Sensor
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* Modified source: by Sebastian Sjoholm, sebastian.sjoholm@gmail.com
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* This version by: Juergen Plate
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*
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* requirement:
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* libusb
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* (sudo apt-get install libusb-dev)
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*
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* compile:
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* gcc i-Wall -o airsensor airsensor.c -lusb
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*/
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#include <assert.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <usb.h>
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#include <time.h>
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/* Device-Handle fuer den Airsensor */
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struct usb_dev_handle *devh;
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void usage()
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{
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printf("\nAirSensor [options]\n");
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printf("Options:\n");
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printf("-d = Debug-Ausgabe einschalten\n");
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printf("-v = Nur den VOC ausgeben; '0', falls Wert ausserhalb (450..2000)\n");
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printf("-o = Nur einen Wert ausgeben und beenden\n");
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printf("-m = Nur Wert fuer MRTG formatiert ausgeben\n");
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printf("-h = Dieser Hilfe-Text\n\n");
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exit(0);
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}
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/* Text und Messwert (falls > 0) mit Datum/Uhrzeit ausgeben */
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void printout(char *str, int value)
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{
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time_t t = time(NULL); /* aktuelle Zeit (Epoche) */
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struct tm tm = *localtime(&t); /* aktuelles Datum/Zeit */
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printf("%04d-%02d-%02d %02d:%02d:%02d, ", tm.tm_year + 1900,
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tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
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if (value == 0)
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{ printf("%s\n", str); }
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else { printf("%s %d\n", str, value); }
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}
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/* USB-Device schliessen, Programm beenden */
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void release_usb_device(int dummy)
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{
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int ret;
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ret = usb_release_interface(devh, 0);
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usb_close(devh);
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exit(ret);
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}
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/* USB-Device zu Vendor- und Product suchen */
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struct usb_device* find_device(int vendor, int product)
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{
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struct usb_bus *bus;
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struct usb_device *dev;
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usb_set_debug(0);
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usb_find_busses();
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usb_find_devices();
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for (bus = usb_get_busses(); bus; bus = bus->next)
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{
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for (dev = bus->devices; dev; dev = dev->next)
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{
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if (dev->descriptor.idVendor == vendor
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&& dev->descriptor.idProduct == product)
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return dev; /* Erfolg: Device zurueckgeben */
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}
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}
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return NULL; /* bei Misserfolg NULL retournieren */
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}
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int main(int argc, char *argv[])
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{
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int ret, vendor, product, counter; /* Hilfsvariable */
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int debug; /* Debug-Ausgabe ein/aus */
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int one_read, voc_only, mrtg_only; /* Flags fuer Optionen */
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struct usb_device *dev; /* USB-Geraet; Airsensor */
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char buf[1000]; /* Datenpuffer */
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unsigned short voc = 0;
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/* Variablen und Flags initialisieren */
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dev = NULL; /* Device init */
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counter = 10; /* Startwert Zaehler */
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debug = 0; /* keine Debug-Ausgabe */
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voc_only = 0; /* normale Ausgabe */
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mrtg_only = 0; /* normale Ausgabe */
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one_read = 0; /* Endlosschleife */
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vendor = 0x03eb; /* Vendor-ID Airsensor */
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product = 0x2013; /* Product-ID Airsensor */
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/* Strg-C abfangen */
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signal(SIGTERM, release_usb_device);
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/* Kommandozeilen-Optionen einlesen */
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while ((argc > 1) && (argv[1][0] == '-'))
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{
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switch (argv[1][1])
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{
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case 'd': debug = 1; break;
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case 'v': voc_only = 1; break;
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case 'm': mrtg_only = 1; break;
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case 'o': one_read = 1; break;
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case 'h': usage(); break;
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}
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++argv;
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--argc;
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}
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if (debug)
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{
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printout("DEBUG: Active", 0);
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printout("DEBUG: Init USB", 0);
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}
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usb_init();
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do {
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/* Airsensor suchen */
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dev = find_device(vendor, product);
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sleep(1);
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/* Falls Airsensor nicht gefunden, mehrmals versuchen */
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if (dev == NULL && debug)
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printout("DEBUG: No device found, wait 10sec...", 0);
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sleep(10);
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counter--;
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} while (dev == NULL && counter > 0);
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if (dev == 0)
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{
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printout("Error: Device not found", 0);
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exit(1);
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}
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if (debug)
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printout("DEBUG: USB device found", 0);
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/* Airsensor oeffnen */
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devh = usb_open(dev);
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assert(devh);
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/* Device belegen */
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ret = usb_get_driver_np(devh, 0, buf, sizeof(buf));
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if (ret == 0)
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ret = usb_detach_kernel_driver_np(devh, 0);
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ret = usb_claim_interface(devh, 0);
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if (ret != 0)
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{
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printout("Error: claim failed with error: ", ret);
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exit(1);
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}
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if (debug)
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printout("DEBUG: Read any remaining data from USB", 0);
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ret = usb_interrupt_read(devh, 0x00000081, buf, 0x0000010, 1000);
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if (debug)
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printout("DEBUG: Return code from USB read: ", ret);
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for(;;)
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{
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/* USB COMMAND TO REQUEST DATA - @h*TR */
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if (debug)
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printout("DEBUG: Write data to device", 0);
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memcpy(buf, "\x40\x68\x2a\x54\x52\x0a\x40\x40\x40\x40\x40\x40\x40\x40\x40\x40", 0x0000010);
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ret = usb_interrupt_write(devh, 0x00000002, buf, 0x0000010, 1000);
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if (debug)
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{
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printout("DEBUG: Return code from USB write: ", ret);
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printout("DEBUG: Read USB", 0);
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}
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ret = usb_interrupt_read(devh, 0x00000081, buf, 0x0000010, 1000);
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if (debug)
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printout("DEBUG: Return code from USB read: ", ret);
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if ( !((ret == 0) || (ret == 16)))
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{
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if (voc_only)
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{ printf("0\n"); }
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else if (mrtg_only)
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{ printf("0\n0\n0\nairsensor\n"); }
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else
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{ printout("ERROR: Invalid result code: ", ret); }
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}
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if (ret == 0)
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{
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if (debug)
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printout("DEBUG: Read USB", 0);
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sleep(1);
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ret = usb_interrupt_read(devh, 0x00000081, buf, 0x0000010, 1000);
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if (debug)
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printout("DEBUG: Return code from USB read: ", ret);
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}
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voc = (buf[3] << 8) + buf[2];
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sleep(1);
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if (debug)
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printout("DEBUG: Read USB [flush]", 0);
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ret = usb_interrupt_read(devh, 0x00000081, buf, 0x0000010, 1000);
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if (debug)
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printout("DEBUG: Return code from USB read: ", ret);
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// According to AppliedSensor specifications the output range is between 450 and 2000
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// So only printout values between this range
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if (voc >= 450 && voc <= 2001)
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{
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if (voc_only)
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{ printf("%d\n", voc); }
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else if (mrtg_only)
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{ printf("%d\n0\n0\nairsensor\n", voc); }
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else
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{ printout("RESULT: OK, VOC: ",voc); }
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}
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else
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{
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if (voc_only)
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{ printf("0\n"); }
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else if (mrtg_only)
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{ printf("0\n0\n0\nairsensor\n"); }
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else
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{ printout("RESULT: Error value out of range, VOC: ",voc); }
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}
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/* Falls nur einmal Lesen eingestellt, exit */
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if (one_read)
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release_usb_device(0);
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/* Pause, dann neuer Schleifendurchlauf */
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sleep(10);
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}
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}
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38
display_airsensor.py
Executable file
38
display_airsensor.py
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#!/usr/bin/python3
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# -*- coding:utf-8 -*-
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import sys
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import os
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picdir = os.path.join(os.path.dirname(os.path.dirname(os.path.realpath(__file__))), 'pic')
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libdir = os.path.join(os.path.dirname(os.path.dirname(os.path.realpath(__file__))), 'lib')
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if os.path.exists(libdir):
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sys.path.append(libdir)
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import logging
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from waveshare_epd import epd2in9
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import time
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from PIL import Image,ImageDraw,ImageFont
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import traceback
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logging.basicConfig(level=logging.DEBUG)
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try:
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epd = epd2in9.EPD()
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logging.info("init and Clear")
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epd.init(epd.lut_full_update)
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epd.Clear(0xFF)
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logging.info("3.read bmp file")
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Himage = Image.open('airsensorimage.bmp')
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epd.display(epd.getbuffer(Himage))
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logging.info("Goto Sleep...")
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epd.sleep()
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epd.Dev_exit()
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except IOError as e:
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logging.info(e)
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except KeyboardInterrupt:
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logging.info("ctrl + c:")
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epd2in9.epdconfig.module_exit()
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exit()
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7
get_airsensor.sh
Executable file
7
get_airsensor.sh
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#!/bin/sh
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cd /root/vocsensor
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echo $(date +"%Y-%m-%d %H:%M:%S"),$(./airsensor -v -o) >> airsensordata.txt
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gnuplot plotImage.gnuplot
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convert -gravity south -fill black -annotate 0 "$(date +"%Y-%m-%d %H:%M:%S")" airsensorimage.png -compress none airsensorimage.bmp
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#convert airsensorimage.png -compress none airsensorimage.bmp
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./display_airsensor.py
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plotImage.gnuplot
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plotImage.gnuplot
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#set title "VOC/Flüchtige organische Verbindungen"
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unset multiplot
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set xdata time
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set style data lines
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set term png size 296,128
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set timefmt "%Y-%m-%d %H:%M:%S"
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set format x ""
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#set format x "%H:%M"
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#set xlabel "Time"
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#set ylabel "VOC"
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set datafile separator ","
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set autoscale y
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set xrange [time(0) - 60*60:]
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set output "airsensorimage.png"
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set tics font ",10"
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plot "airsensordata.txt" using 1:($2 == 0 ? NaN : $2) w lines notitle
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