Hi all,
I am trying to send two independent sensor values over LoRa. I am using TTGO board (ESP32 with LoRa chip). I am using LDR sensor that measures light intensity and Ping (Range) sensor. When I wrote the code, only one value appears at M2X server (The value from LDR sensor). Inside the code, I used the following two lines to send data to through the TTGO board:
LMIC_setTxData2(1, mydata1, sizeof(mydata1), 0);
LMIC_setTxData2(1, mydata2, sizeof(mydata2), 0);
It seems that the LMIC_setTxData2 takes the reading from mydata2 and send it to LoRa Chip.
What I need is: Sending the value of LDR sensor first and after 10 seconds I want to send the value of the Ping sensor.
The full code is below for your reference. Your contributions are very much appreciated.
Thanks in advance.
#include <lmic.h>
#include <hal/hal.h>
#include <SPI.h>
#include <U8x8lib.h>
int Trig=12;
int Echo=13;
int LDR = 34;
int LightIntensity = 0;
const lmic_pinmap lmic_pins = { .nss = 18,
.rxtx = LMIC_UNUSED_PIN,
.rst = 14,
.dio = {26, 33, 32},};
U8X8_SSD1306_128X64_NONAME_SW_I2C u8x8( 15, 4, 16);
static const u1_t PROGMEM APPEUI[8]= { 0x00, 0x80, 0x00, 0x00, 0xA0, 0x00, 0x1F, 0x18 };
void os_getArtEui (u1_t* buf) { memcpy_P(buf, APPEUI, 8);}
static const u1_t PROGMEM DEVEUI[8]={ 0x11, 0x88, 0x77, 0x66, 0x55, 0x44, 0x33, 0x22 };
void os_getDevEui (u1_t* buf) { memcpy_P(buf, DEVEUI, 8);}
static const u1_t PROGMEM APPKEY[16] = { 0x00, 0x80, 0x00, 0x00, 0xA0, 0x00, 0x1F, 0x18, 0x00, 0x80, 0x00, 0x00, 0xA0, 0x00, 0x1F, 0x18 };
void os_getDevKey (u1_t* buf) { memcpy_P(buf, APPKEY, 16);}
const unsigned TX_INTERVAL = 20;
static osjob_t sendjob;
void onEvent (ev_t ev) {
switch (ev) {
case EV_SCAN_TIMEOUT:
Serial.println(F("Scan Timeout"));
u8x8.drawString(0, 4, "Scan Timeout");
break;
case EV_BEACON_FOUND:
Serial.println(F("Beacon Found"));
u8x8.drawString(0, 4, "Beacon Found");
break;
case EV_BEACON_MISSED:
Serial.println(F("Beacon Missed"));
u8x8.drawString(0, 4, "Beacon Missed");
break;
case EV_BEACON_TRACKED:
Serial.println(F("Beacon Tracked"));
u8x8.drawString(0, 7, "Beacon Tracked");
break;
case EV_JOINING:
Serial.println(F("Joining..."));
u8x8.drawString(0, 4, "Joining...");
break;
case EV_JOINED:
Serial.println(F("Joined!"));
u8x8.drawString(5, 4, "Joined! ");
LMIC_setLinkCheckMode(0);
break;
case EV_RFU1:
Serial.println(F("RFU1"));
u8x8.drawString(0, 4, "RFU1");
break;
case EV_JOIN_FAILED:
Serial.println(F("Join Failed"));
u8x8.drawString(0, 4, "Join Failed");
break;
case EV_REJOIN_FAILED:
Serial.println(F("Rejoin Failed"));
u8x8.drawString(0, 4, "Rejoin Failed");
break;
case EV_TXCOMPLETE:
Serial.println(F("TX Complete"));
u8x8.drawString(0, 4, "TX Complete");
if (LMIC.txrxFlags & TXRX_ACK) { Serial.println(F("Received ACK"));
u8x8.drawString(0, 5, "Received ACK");
}
if (LMIC.dataLen) { Serial.println(F("Received "));
u8x8.drawString(0, 3, "RX ");
Serial.println(LMIC.dataLen);
u8x8.setCursor(4, 3);
u8x8.printf("%i bytes", LMIC.dataLen);
Serial.println(F(" bytes of payload"));
u8x8.setCursor(0, 5);
u8x8.printf("RSSI %d SNR %.1d", LMIC.rssi, LMIC.snr); }
os_setTimedCallback(&sendjob, os_getTime() + sec2osticks(TX_INTERVAL), do_send);
break;
case EV_LOST_TSYNC:
Serial.println(F("Lost SYNC"));
u8x8.drawString(0, 4, "Lost SYNC");
break;
case EV_RESET:
Serial.println(F("Reset"));
u8x8.drawString(0, 4, "Reset");
break;
case EV_RXCOMPLETE:
Serial.println(F("RX Complete"));
u8x8.drawString(0, 5, "RX Complete");
break;
case EV_LINK_DEAD:
Serial.println(F("Link Dead"));
u8x8.drawString(0, 4, "Link Dead");
break;
case EV_LINK_ALIVE:
Serial.println(F("Link Alive"));
u8x8.drawString(0, 5, "Link Alive");
break;
default:
Serial.println(F("Unknown event"));
u8x8.setCursor(0, 4);
u8x8.printf("Unknown Event %d", ev);
break; }}
void do_send(osjob_t* j) {
int dur;
long dis;
int intensity = 0;
static uint8_t mydata1[] = { 0,0,0,0,0,0,0,0};
static uint8_t mydata2[] = { 0,0,0,0,0,0,0,0};
digitalWrite(Trig,LOW);
delayMicroseconds(2);
digitalWrite(Trig,HIGH);
delayMicroseconds(10);
digitalWrite(Trig,LOW);
dur=pulseIn(Echo,HIGH);
dur = dur / 29 / 2;
dtostrf(dur, 5, 2, (char*)mydata1);
Serial.print("Water Level = ");
Serial.print(dur);
Serial.println(" cm");
intensity = analogRead(LDR);
Serial.print("Light intensity = ");
Serial.println(intensity);
dtostrf(intensity, 5, 2, (char*)mydata2);
LMIC_setTxData2(1, mydata1, sizeof(mydata1), 0);
LMIC_setTxData2(1, mydata2, sizeof(mydata2), 0);
}
void setup() {
Serial.begin(115200);
pinMode(Trig,OUTPUT);
pinMode(Echo,INPUT);
u8x8.begin();
u8x8.setFont(u8x8_font_chroma48medium8_r);
u8x8.drawString(5, 1, "Node 5");
u8x8.drawString(0, 2, "Level & Intensit");
SPI.begin(5, 19, 27);
os_init();
LMIC_reset();
do_send(&sendjob);
}
void loop() {
os_runloop_once();
}