End2End LoRa gateway and device tutorial

1#include <lmic.h>
2#include <hal/hal.h>
3#include "U8glib.h"
4#include  <DHT.h>
5
6
7// OLED Display configuration
8U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE|U8G_I2C_OPT_DEV_0);  // I2C / TWI 
9
10#define DHTTYPE    DHT22     // DHT 22 (AM2302)
11#define  DHTPIN 8
12
13DHT dht(DHTPIN, DHTTYPE);
14
15
16// LoRaWAN NwkSKey, network  session **** DO NOT USE AS IS. NEEDS TO BE CHANGED AS PER TUTORIAL ******
17static  const PROGMEM u1_t NWKSKEY[16] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
18
19// LoRaWAN AppSKey, application  session key **** DO NOT USE AS IS. NEEDS TO BE CHANGED AS PER TUTORIAL ******
20static  const u1_t PROGMEM APPSKEY[16] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
21
22// LoRaWAN end-device address  (DevAddr) **** DO NOT USE AS IS. NEEDS TO BE CHANGED AS PER TUTORIAL ******
23static  const u4_t DEVADDR = { 0xFFFFFFFF };
24
25// These callbacks are only used in  over-the-air activation, so they are
26// left empty here (we cannot leave them  out completely unless
27// DISABLE_JOIN is set in config.h, otherwise the linker  will complain).
28void os_getArtEui (u1_t* buf) { }
29void os_getDevEui (u1_t*  buf) { }
30void os_getDevKey (u1_t* buf) { }
31
32//static uint8_t mydata[] =  "LoRa Device Test";
33static osjob_t sendjob;
34
35// Schedule data trasmission  in every this many seconds (might become longer due to duty
36// cycle limitations).
37//  we set 10 seconds interval
38const unsigned TX_INTERVAL = 10;
39
40// Pin mapping  according to Cytron LoRa Shield RFM
41const lmic_pinmap lmic_pins = {
42  .nss  = 10,
43  .rxtx = LMIC_UNUSED_PIN,
44  .rst = 7,
45  .dio = {2, 5, 6},
46};
47
48void  onEvent (ev_t ev) {
49
50  switch(ev) {
51    case EV_TXCOMPLETE:
52      Serial.println(F("EV_TXCOMPLETE  (includes waiting for RX windows)"));
53      // Schedule next transmission
54      os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send);
55      break;  
56    default:
57      Serial.println(F("Unknown event"));
58      break;
59  }
60}
61
62void do_send(osjob_t* j){
63  char ValueT[5];
64  char ValueH[5];
65  int Temperature;
66  int Humidity;
67  
68  // Check if  there is not a current TX/RX job running
69  if (LMIC.opmode & OP_TXRXPEND) {
70    Serial.println(F("OP_TXRXPEND, not sending"));
71  } else {
72  // Get Temperature
73  Temperature=int(dht.readTemperature()*10);
74  // Get humidity 
75  Humidity=int(dht.readHumidity()*10);
76
77  // Format the values to be printed on OLED Screen
78  sprintf(ValueT, "%d.%d",  int(dht.readTemperature()),int(dht.readTemperature()*10)-(int(dht.readTemperature())*10));
79  sprintf(ValueH, "%d.%d", int(dht.readHumidity()),int(dht.readHumidity()*10)-(int(dht.readHumidity())*10));
80  u8g.firstPage();  
81  do {
82    draw("LoRa", 50, 10);
83    draw("Temperature:",  0, 30);
84    draw(ValueT, 85, 30);
85    draw("C", 115, 30);
86    draw("Humidity:",  0, 50);
87    draw(ValueH, 85, 50);
88    draw("%", 115, 50);
89    } while(  u8g.nextPage() );
90 
91    // prepare and schedule data for transmission 
92    LMIC.frame[0] = Temperature >> 8; 
93    LMIC.frame[1] = Temperature;
94    LMIC.frame[2]  = Humidity >> 8;
95    LMIC.frame[3] = Humidity; 
96    LMIC_setTxData2(1, LMIC.frame,  4, 0); // (port 1, 4 bytes, unconfirmed)
97
98    Serial.println(F("Packet queued"));
99  }
100  // Next TX is scheduled after TX_COMPLETE event.
101}
102
103void setup()  {
104  Serial.begin(9600);
105  Serial.println(F("Starting"));
106  u8g.setColorIndex(1);         // pixel on for Display 
107
108  // Initialize Temp sensor device.
109  dht.begin();
110
111  // LMIC init
112  os_init();
113
114  // Reset the MAC state.  Session and pending data transfers will be discarded.
115  LMIC_reset();
116
117  // Set static session parameters. Instead of dynamically establishing a session
118  // by joining the network, precomputed session parameters are be provided.
119  uint8_t appskey[sizeof(APPSKEY)];
120  uint8_t nwkskey[sizeof(NWKSKEY)];
121  memcpy_P(appskey,  APPSKEY, sizeof(APPSKEY));
122  memcpy_P(nwkskey, NWKSKEY, sizeof(NWKSKEY));
123  LMIC_setSession (0x1, DEVADDR, nwkskey, appskey);
124
125  // Disable link check  validation
126  LMIC_setLinkCheckMode(0);
127
128  // Disable ADR
129  LMIC_setAdrMode(false);
130
131  // TTN uses SF9 for its RX2 window.
132  LMIC.dn2Dr = DR_SF9;
133
134  // Set  data rate and transmit power for uplink (note: txpow seems to be ignored by the  library)
135  LMIC_setDrTxpow(DR_SF7,14);
136
137  // Start job
138  do_send(&sendjob);
139}
140
141void  loop() {
142  os_runloop_once();
143
144}
145
146void draw(char* parola, int posx,  int posy) {
147  // graphic commands to redraw the complete screen should be placed  here  
148  u8g.setFont(u8g_font_tpssb);
149  u8g.drawStr( posx, posy, parola);
150}
151