ttgo-t-beam-gps-ttn-tracker/main/main.ino

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2019-02-10 18:35:12 +00:00
/*
Main module
# Modified by Kyle T. Gabriel to fix issue with incorrect GPS data for TTNMapper
Copyright (C) 2018 by Xose Pérez <xose dot perez at gmail dot com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "configuration.h"
#include <rom/rtc.h>
uint8_t txBuffer[9];
// Message counter, stored in RTC memory, survives deep sleep
RTC_DATA_ATTR uint32_t count = 0;
// -----------------------------------------------------------------------------
// Application
// -----------------------------------------------------------------------------
void send() {
char buffer[40];
snprintf(buffer, sizeof(buffer), "Latitude: %10.6f\n", gps_latitude());
screen_print(buffer);
snprintf(buffer, sizeof(buffer), "Longitude: %10.6f\n", gps_longitude());
screen_print(buffer);
snprintf(buffer, sizeof(buffer), "Error: %4.2fm\n", gps_hdop());
screen_print(buffer);
buildPacket(txBuffer);
#if LORAWAN_CONFIRMED_EVERY > 0
bool confirmed = (count % LORAWAN_CONFIRMED_EVERY == 0);
#else
bool confirmed = false;
#endif
ttn_cnt(count);
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ttn_send(txBuffer, sizeof(txBuffer), LORAWAN_PORT, confirmed);
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count++;
}
void sleep() {
#if SLEEP_BETWEEN_MESSAGES
// Show the going to sleep message on the screen
char buffer[20];
snprintf(buffer, sizeof(buffer), "Sleeping in %3.1fs\n", (MESSAGE_TO_SLEEP_DELAY / 1000.0));
screen_print(buffer);
// Wait for MESSAGE_TO_SLEEP_DELAY millis to sleep
delay(MESSAGE_TO_SLEEP_DELAY);
// Turn off screen
screen_off();
// Set the user button to wake the board
sleep_interrupt(BUTTON_PIN, LOW);
// We sleep for the interval between messages minus the current millis
// this way we distribute the messages evenly every SEND_INTERVAL millis
uint32_t sleep_for = (millis() < SEND_INTERVAL) ? SEND_INTERVAL - millis() : SEND_INTERVAL;
sleep_millis(sleep_for);
#endif
}
void callback(uint8_t message) {
if (EV_JOINING == message) screen_print("Joining TTN...\n");
if (EV_JOINED == message) screen_print("TTN joined!\n");
if (EV_JOIN_FAILED == message) screen_print("TTN join failed\n");
if (EV_REJOIN_FAILED == message) screen_print("TTN rejoin failed\n");
if (EV_RESET == message) screen_print("Reset TTN connection\n");
if (EV_LINK_DEAD == message) screen_print("TTN link dead\n");
if (EV_ACK == message) screen_print("ACK received\n");
if (EV_PENDING == message) screen_print("Message discarded\n");
if (EV_QUEUED == message) screen_print("Message queued\n");
if (EV_TXCOMPLETE == message) {
screen_print("Message sent\n");
sleep();
}
if (EV_RESPONSE == message) {
screen_print("[TTN] Response: ");
size_t len = ttn_response_len();
uint8_t data[len];
ttn_response(data, len);
char buffer[6];
for (uint8_t i=0; i<len; i++) {
snprintf(buffer, sizeof(buffer), "%02X", data[i]);
screen_print(buffer);
}
screen_print("\n");
}
}
uint32_t get_count() {
return count;
}
void setup() {
// Debug
#ifdef DEBUG_PORT
DEBUG_PORT.begin(SERIAL_BAUD);
#endif
// Buttons & LED
pinMode(BUTTON_PIN, INPUT_PULLUP);
pinMode(LED_PIN, OUTPUT);
// Hello
DEBUG_MSG(APP_NAME " " APP_VERSION "\n");
// Display
screen_setup();
// Init GPS
gps_setup();
// Show logo on first boot
if (0 == count) {
screen_print(APP_NAME " " APP_VERSION, 0, 0);
screen_show_logo();
screen_update();
delay(LOGO_DELAY);
}
// TTN setup
if (!ttn_setup()) {
screen_print("[ERR] Radio module not found!\n");
delay(MESSAGE_TO_SLEEP_DELAY);
screen_off();
sleep_forever();
}
ttn_register(callback);
ttn_join();
ttn_sf(LORAWAN_SF);
ttn_adr(LORAWAN_ADR);
}
void loop() {
gps_loop();
ttn_loop();
screen_loop();
// Send every SEND_INTERVAL millis
static uint32_t last = 0;
static bool first = true;
if (0 == last || millis() - last > SEND_INTERVAL) {
if (0 < gps_hdop() && gps_hdop() < 50 && gps_latitude() != 0 && gps_longitude() != 0) {
last = millis();
first = false;
send();
} else {
if (first) {
screen_print("Waiting GPS lock\n");
first = false;
}
if (millis() > GPS_WAIT_FOR_LOCK) {
sleep();
}
}
}
}