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| Zeile 34: |
Zeile 34: |
| | * C-Code (Arduino-Style) zum Auslesen des Sensors und Versenden des Ergebnisses per LoRaWAN | | * C-Code (Arduino-Style) zum Auslesen des Sensors und Versenden des Ergebnisses per LoRaWAN |
| | * InfluxDB und Grafana [[Datei:mq135messwerte.png|mini|Verlauf der Sensor-Messwerte vom MQ-135]] | | * InfluxDB und Grafana [[Datei:mq135messwerte.png|mini|Verlauf der Sensor-Messwerte vom MQ-135]] |
| − |
| |
| − | <syntaxhighlight lang="c">
| |
| − |
| |
| − | #include <Arduino.h>
| |
| − |
| |
| − | #include <U8g2lib.h>
| |
| − | //https://github.com/olikraus/u8g2
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| − |
| |
| − | #include "esp_system.h"
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| − |
| |
| − | #include <lmic.h>
| |
| − | #include <hal/hal.h>
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| − | #include <SPI.h>
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| − |
| |
| − | #ifdef U8X8_HAVE_HW_I2C
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| − | #include <Wire.h>
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| − | #endif
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| − |
| |
| − | // LoRaWAN NwkSKey, network session key
| |
| − | // This is the default Semtech key, which is used by the prototype TTN
| |
| − | // network initially.
| |
| − | static const PROGMEM u1_t NWKSKEY[16] = { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C };
| |
| − |
| |
| − | // LoRaWAN AppSKey, application session key
| |
| − | // This is the default Semtech key, which is used by the prototype TTN
| |
| − | // network initially.
| |
| − | static const u1_t PROGMEM APPSKEY[16] = { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C };
| |
| − |
| |
| − | // LoRaWAN end-device address (DevAddr)
| |
| − | // See http://thethingsnetwork.org/wiki/AddressSpace
| |
| − | static const u4_t DEVADDR = 0x03FF0001 ; // <-- Change this address for every node!
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| − |
| |
| − | int sensorPin = 34; // select the input pin for the potentiometer
| |
| − | int ledPin = 25; // select the pin for the LED
| |
| − | int sensorValue = 0; // variable to store the value coming from the sensor
| |
| − | int counter = 0;
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| − |
| |
| − | // These callbacks are only used in over-the-air activation, so they are
| |
| − | // left empty here (we cannot leave them out completely unless
| |
| − | // DISABLE_JOIN is set in config.h, otherwise the linker will complain).
| |
| − | void os_getArtEui (u1_t* buf) { }
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| − | void os_getDevEui (u1_t* buf) { }
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| − | void os_getDevKey (u1_t* buf) { }
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| − |
| |
| − | uint8_t mydata[] = "Empty";
| |
| − | static osjob_t sendjob;
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| − |
| |
| − | // Schedule TX every this many seconds (might become longer due to duty
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| − | // cycle limitations).
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| − | const unsigned TX_INTERVAL = 60;
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| − |
| |
| − | // Pin mapping
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| − | const lmic_pinmap lmic_pins = {
| |
| − | .nss = 6,
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| − | .rxtx = LMIC_UNUSED_PIN,
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| − | .rst = 5,
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| − | .dio = {2, 3, 4},
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| − | };
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| − |
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| − | void onEvent (ev_t ev) {
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| − | Serial.print(os_getTime());
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| − | Serial.print(": ");
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| − | switch(ev) {
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| − | case EV_SCAN_TIMEOUT:
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| − | Serial.println(F("EV_SCAN_TIMEOUT"));
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| − | break;
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| − | case EV_BEACON_FOUND:
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| − | Serial.println(F("EV_BEACON_FOUND"));
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| − | break;
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| − | case EV_BEACON_MISSED:
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| − | Serial.println(F("EV_BEACON_MISSED"));
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| − | break;
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| − | case EV_BEACON_TRACKED:
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| − | Serial.println(F("EV_BEACON_TRACKED"));
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| − | break;
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| − | case EV_JOINING:
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| − | Serial.println(F("EV_JOINING"));
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| − | break;
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| − | case EV_JOINED:
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| − | Serial.println(F("EV_JOINED"));
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| − | break;
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| − | case EV_RFU1:
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| − | Serial.println(F("EV_RFU1"));
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| − | break;
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| − | case EV_JOIN_FAILED:
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| − | Serial.println(F("EV_JOIN_FAILED"));
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| − | break;
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| − | case EV_REJOIN_FAILED:
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| − | Serial.println(F("EV_REJOIN_FAILED"));
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| − | break;
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| − | break;
| |
| − | case EV_TXCOMPLETE:
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| − | Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)"));
| |
| − | if(LMIC.dataLen) {
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| − | // data received in rx slot after tx
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| − | Serial.print(F("Data Received: "));
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| − | Serial.write(LMIC.frame+LMIC.dataBeg, LMIC.dataLen);
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| − | Serial.println();
| |
| − | }
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| − | // Schedule next transmission
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| − | os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send);
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| − | break;
| |
| − | case EV_LOST_TSYNC:
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| − | Serial.println(F("EV_LOST_TSYNC"));
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| − | break;
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| − | case EV_RESET:
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| − | Serial.println(F("EV_RESET"));
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| − | break;
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| − | case EV_RXCOMPLETE:
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| − | // data received in ping slot
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| − | Serial.println(F("EV_RXCOMPLETE"));
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| − | break;
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| − | case EV_LINK_DEAD:
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| − | Serial.println(F("EV_LINK_DEAD"));
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| − | break;
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| − | case EV_LINK_ALIVE:
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| − | Serial.println(F("EV_LINK_ALIVE"));
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| − | break;
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| − | default:
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| − | Serial.println(F("Unknown event"));
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| − | break;
| |
| − | }
| |
| − | }
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| − |
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| − | void do_send(osjob_t* j){
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| − | // Check if there is not a current TX/RX job running
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| − | if (LMIC.opmode & OP_TXRXPEND) {
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| − | Serial.println(F("OP_TXRXPEND, not sending"));
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| − | } else {
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| − | // Prepare upstream data transmission at the next possible time.
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| − | LMIC_setTxData2(1, mydata, sizeof(mydata)-1, 0);
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| − | Serial.println(F("Packet queued"));
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| − | }
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| − | // Next TX is scheduled after TX_COMPLETE event.
| |
| − | }
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| − |
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| − |
| |
| − | /*
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| − | U8glib Example Overview:
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| − | Frame Buffer Examples: clearBuffer/sendBuffer. Fast, but may not work with all Arduino boards because of RAM consumption
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| − | Page Buffer Examples: firstPage/nextPage. Less RAM usage, should work with all Arduino boards.
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| − | U8x8 Text Only Example: No RAM usage, direct communication with display controller. No graphics, 8x8 Text only.
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| − |
| |
| − | */
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| − |
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| − | // U8g2 Contructor List (Frame Buffer)
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| − | // The complete list is available here: https://github.com/olikraus/u8g2/wiki/u8g2setupcpp
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| − |
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| − | U8G2_SSD1306_128X64_NONAME_F_SW_I2C u8g2(U8G2_R0, /* clock=*/ 15, /* data=*/ 4, /* reset=*/ 16);
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| − |
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| − | void u8g2_prepare(void) {
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| − | u8g2.setFont(u8g2_font_6x10_tf);
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| − | //https://github.com/olikraus/u8g2/wiki/fntgrpx11
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| − | u8g2.setFontRefHeightExtendedText();
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| − | u8g2.setDrawColor(1);
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| − | u8g2.setFontPosTop();
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| − | u8g2.setFontDirection(0);
| |
| − | }
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| − |
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| − | #define opennetlogobw_width 64
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| − | #define opennetlogobw_height 64
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| − | static unsigned char opennetlogobw_bits[] = {
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| − | 0x00, 0x00, 0x80, 0xff, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x07,
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| − | 0xfc, 0x03, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x1f, 0x00, 0x00,
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| − | 0x00, 0xe0, 0x01, 0x00, 0x00, 0x78, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00,
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| − | 0x00, 0xc0, 0x03, 0x00, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00,
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| − | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00, 0xc0, 0xff,
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| − | 0x3f, 0x00, 0x70, 0x00, 0x00, 0x00, 0xf8, 0x00, 0xf0, 0x03, 0xc0, 0x00,
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| − | 0x00, 0x00, 0x0f, 0x00, 0x00, 0x0f, 0x80, 0x01, 0x00, 0xc0, 0x01, 0x00,
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| − | 0x00, 0x38, 0x00, 0x03, 0x00, 0x40, 0x00, 0x00, 0x00, 0xe0, 0x00, 0x06,
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| − | 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x03, 0x1c, 0x00, 0x00, 0x00, 0xfc,
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| − | 0x03, 0x00, 0x06, 0x38, 0x00, 0x00, 0xc0, 0xff, 0x7f, 0x00, 0x1c, 0x30,
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| − | 0x00, 0x00, 0x78, 0x00, 0xe0, 0x01, 0x38, 0x60, 0x00, 0x00, 0x0e, 0x00,
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| − | 0x00, 0x07, 0x60, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0xc0, 0x00,
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| − | 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
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| − | 0x00, 0xe0, 0x80, 0x01, 0x00, 0x00, 0x00, 0xfe, 0x07, 0x80, 0x01, 0x01,
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| − | 0x00, 0x00, 0xc0, 0x07, 0x3c, 0x00, 0x03, 0x00, 0x00, 0x00, 0x60, 0x00,
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| − | 0xe0, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x01, 0x06, 0x00,
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| − | 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| − | 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, 0x00, 0x18, 0x00, 0x00,
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| − | 0x00, 0x00, 0x00, 0xfe, 0x07, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06,
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| − | 0x1c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x00,
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| − | 0x00, 0x00, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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| − | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00,
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| − | 0x00, 0x00, 0xfe, 0x01, 0x80, 0x1f, 0x00, 0x00, 0x00, 0x00, 0xff, 0x03,
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| − | 0xc0, 0x3f, 0x00, 0x00, 0x00, 0x00, 0xff, 0x07, 0xe0, 0x7f, 0x00, 0x00,
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| − | 0x00, 0x00, 0xff, 0x07, 0xe0, 0x7f, 0x00, 0x00, 0x00, 0x02, 0xff, 0x07,
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| − | 0xe0, 0xff, 0x00, 0x00, 0x00, 0x04, 0xfe, 0x03, 0xe0, 0x7f, 0x00, 0x00,
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| − | 0x00, 0x0c, 0xfc, 0x03, 0xe0, 0x7f, 0x00, 0x00, 0x00, 0x38, 0xf0, 0x00,
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| − | 0xc0, 0x3f, 0x80, 0x00, 0x00, 0x78, 0x00, 0x00, 0x00, 0x06, 0xc0, 0x00,
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| − | 0x00, 0xf0, 0x01, 0x00, 0x01, 0x00, 0x60, 0x00, 0x00, 0xf0, 0x07, 0x10,
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| − | 0x1e, 0x00, 0x78, 0x00, 0x00, 0xe0, 0x3f, 0x0f, 0xf8, 0x07, 0x7e, 0x00,
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| − | 0x00, 0xe0, 0xff, 0x07, 0xf0, 0xff, 0x7f, 0x00, 0x00, 0xe0, 0xff, 0x07,
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| − | 0xc0, 0xff, 0x7f, 0x00, 0x00, 0xe0, 0xff, 0x03, 0x80, 0xff, 0x3f, 0x00,
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| − | 0x00, 0xe0, 0xff, 0x01, 0x00, 0xff, 0x3f, 0x00, 0x00, 0xf0, 0xff, 0x01,
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| − | 0x00, 0xfe, 0x3f, 0x00, 0x00, 0xf8, 0xff, 0x00, 0x00, 0xfe, 0x3f, 0x00,
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| − | 0x00, 0xfe, 0xff, 0x00, 0x00, 0xfc, 0x7f, 0x00, 0x80, 0xff, 0xff, 0x00,
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| − | 0x00, 0xfc, 0x7f, 0x00, 0xe0, 0x03, 0xff, 0x00, 0x00, 0xfe, 0xff, 0x00,
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| − | 0x04, 0x00, 0xf8, 0x00, 0x00, 0xfe, 0xff, 0x00, 0x00, 0x00, 0xf0, 0x00,
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| − | 0x00, 0xff, 0xff, 0x01, 0x00, 0x00, 0xe0, 0x00, 0x00, 0x3f, 0xe0, 0x01,
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| − | 0x00, 0x00, 0xc0, 0x00, 0x80, 0x0f, 0x80, 0x03, 0x00, 0x00, 0x80, 0x00,
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| − | 0xc0, 0x03, 0x00, 0x06, 0x00, 0x00, 0x80, 0x00, 0xe0, 0x00, 0x00, 0x08,
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| − | 0x00, 0x00, 0x00, 0x01, 0x30, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00,
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| − | 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
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| − | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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| − |
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| − |
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| − | void u8g2_bitmap_modes(uint8_t transparent) {
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| − | const uint8_t frame_size = 24;
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| − |
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| − | u8g2.setDrawColor(1);// Black
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| − | u8g2.drawXBMP(0, 0, opennetlogobw_width, opennetlogobw_height, opennetlogobw_bits);
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| − | }
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| − |
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| − | void draw(void) {
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| − | u8g2_prepare();
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| − | u8g2_bitmap_modes(0);
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| − | }
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| − |
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| − |
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| − | void setup(void) {
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| − | u8g2.begin();
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| − | pinMode(ledPin, OUTPUT);
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| − | pinMode(sensorPin, INPUT);
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| − | Serial.begin(115200);
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| − | Serial.println("Programm gestartet!");
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| − |
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| − |
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| − | #ifdef VCC_ENABLE
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| − | // For Pinoccio Scout boards
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| − | pinMode(VCC_ENABLE, OUTPUT);
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| − | digitalWrite(VCC_ENABLE, HIGH);
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| − | delay(1000);
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| − | #endif
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| − |
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| − | // LMIC init
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| − | os_init();
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| − | // Reset the MAC state. Session and pending data transfers will be discarded.
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| − | LMIC_reset();
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| − |
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| − | // Set static session parameters. Instead of dynamically establishing a session
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| − | // by joining the network, precomputed session parameters are be provided.
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| − | #ifdef PROGMEM
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| − | // On AVR, these values are stored in flash and only copied to RAM
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| − | // once. Copy them to a temporary buffer here, LMIC_setSession will
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| − | // copy them into a buffer of its own again.
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| − | uint8_t appskey[sizeof(APPSKEY)];
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| − | uint8_t nwkskey[sizeof(NWKSKEY)];
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| − | memcpy_P(appskey, APPSKEY, sizeof(APPSKEY));
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| − | memcpy_P(nwkskey, NWKSKEY, sizeof(NWKSKEY));
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| − | LMIC_setSession (0x1, DEVADDR, nwkskey, appskey);
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| − | #else
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| − | // If not running an AVR with PROGMEM, just use the arrays directly
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| − | LMIC_setSession (0x1, DEVADDR, NWKSKEY, APPSKEY);
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| − | #endif
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| − |
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| − | // Set up the channels used by the Things Network, which corresponds
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| − | // to the defaults of most gateways. Without this, only three base
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| − | // channels from the LoRaWAN specification are used, which certainly
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| − | // works, so it is good for debugging, but can overload those
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| − | // frequencies, so be sure to configure the full frequency range of
| |
| − | // your network here (unless your network autoconfigures them).
| |
| − | // Setting up channels should happen after LMIC_setSession, as that
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| − | // configures the minimal channel set.
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| − | LMIC_setupChannel(0, 868100000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
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| − | LMIC_setupChannel(1, 868300000, DR_RANGE_MAP(DR_SF12, DR_SF7B), BAND_CENTI); // g-band
| |
| − | LMIC_setupChannel(2, 868500000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
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| − | LMIC_setupChannel(3, 867100000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
| |
| − | LMIC_setupChannel(4, 867300000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
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| − | LMIC_setupChannel(5, 867500000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
| |
| − | LMIC_setupChannel(6, 867700000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
| |
| − | LMIC_setupChannel(7, 867900000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
| |
| − | LMIC_setupChannel(8, 868800000, DR_RANGE_MAP(DR_FSK, DR_FSK), BAND_MILLI); // g2-band
| |
| − | // TTN defines an additional channel at 869.525Mhz using SF9 for class B
| |
| − | // devices' ping slots. LMIC does not have an easy way to define set this
| |
| − | // frequency and support for class B is spotty and untested, so this
| |
| − | // frequency is not configured here.
| |
| − |
| |
| − | // Disable link check validation
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| − | LMIC_setLinkCheckMode(0);
| |
| − |
| |
| − | // Set data rate and transmit power (note: txpow seems to be ignored by the library)
| |
| − | LMIC_setDrTxpow(DR_SF7,14);
| |
| − |
| |
| − | // Start job
| |
| − | do_send(&sendjob);
| |
| − | }
| |
| − |
| |
| − | void loop(void) {
| |
| − | digitalWrite(ledPin, LOW);
| |
| − | u8g2.clearBuffer();
| |
| − | draw();
| |
| − | sensorValue = analogRead(sensorPin);
| |
| − | u8g2.setFont(u8g2_font_6x10_tf);
| |
| − | char c[64];
| |
| − | String str;
| |
| − | str = String(sensorValue);
| |
| − | Serial.println(str);
| |
| − | str.getBytes(mydata, 64);
| |
| − | // mydata will be sent in do_send() which is also called in case we receive a EV_TXCOMPLETE event
| |
| − | str.toCharArray(c, 64);
| |
| − | u8g2.drawStr(75,0, "Sensor");
| |
| − | u8g2.drawStr(75,10, "readout:");
| |
| − | u8g2.drawStr(75,20, c);
| |
| − | u8g2.drawStr(75,34, "LoRaWAN");
| |
| − | u8g2.drawStr(75,44, "message");
| |
| − | str = String(counter);
| |
| − | Serial.println(str);
| |
| − | str.toCharArray(c, 64);
| |
| − | u8g2.drawStr(75,54, c);
| |
| − | counter++;
| |
| − | u8g2.sendBuffer();
| |
| − | delay(2500);
| |
| − | digitalWrite(ledPin, HIGH);
| |
| − | delay(2500);
| |
| − | }
| |
| − | </syntaxhighlight>
| |
ESP32 mit LoRa Transceiver, WLAN
Luftgütesensor MQ-135 mit AD-Wandler ADS1115 auf Bredboard
Verlauf der Sensor-Messwerte vom MQ-135
