267 lines
8.9 KiB
Arduino
267 lines
8.9 KiB
Arduino
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/*******************************************************************************
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* The Things Network - ABP Feather
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*
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* Example of using an Adafruit Feather M0 and DHT22 with a
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* single-channel TheThingsNetwork gateway.
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*
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* This uses ABP (Activation by Personalization), where session keys for
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* communication would be assigned/generated by TTN and hard-coded on the device.
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*
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* Learn Guide: https://learn.adafruit.com/lora-pi
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*
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* Copyright (c) 2015 Thomas Telkamp and Matthijs Kooijman
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* Copyright (c) 2018 Terry Moore, MCCI
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* Copyright (c) 2018 Brent Rubell, Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to anyone
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* obtaining a copy of this document and accompanying files,
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* to do whatever they want with them without any restriction,
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* including, but not limited to, copying, modification and redistribution.
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* NO WARRANTY OF ANY KIND IS PROVIDED.
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*******************************************************************************/
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#include <lmic.h>
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#include <hal/hal.h>
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#include <SPI.h>
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// include the DHT22 Sensor Library
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#include "DHT.h"
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// DHT digital pin and sensor type
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#define DHTPIN 10
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#define DHTTYPE DHT22
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//
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// For normal use, we require that you edit the sketch to replace FILLMEIN
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// with values assigned by the TTN console. However, for regression tests,
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// we want to be able to compile these scripts. The regression tests define
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// COMPILE_REGRESSION_TEST, and in that case we define FILLMEIN to a non-
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// working but innocuous value.
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//
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#ifdef COMPILE_REGRESSION_TEST
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# define FILLMEIN 0
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#else
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# warning "You must replace the values marked FILLMEIN with real values from the TTN control panel!"
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# define FILLMEIN (#dont edit this, edit the lines that use FILLMEIN)
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#endif
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// LoRaWAN NwkSKey, network session key
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static const PROGMEM u1_t NWKSKEY[16] = { FILLMEIN };
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// LoRaWAN AppSKey, application session key
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static const u1_t PROGMEM APPSKEY[16] = { FILLMEIN };
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// LoRaWAN end-device address (DevAddr)
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// See http://thethingsnetwork.org/wiki/AddressSpace
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// The library converts the address to network byte order as needed.
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#ifndef COMPILE_REGRESSION_TEST
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static const u4_t DEVADDR = 0xFILLMEIN;
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#else
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static const u4_t DEVADDR = 0;
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#endif
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// These callbacks are only used in over-the-air activation, so they are
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// left empty here (we cannot leave them out completely unless
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// DISABLE_JOIN is set in arduino-lmic/project_config/lmic_project_config.h,
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// otherwise the linker will complain).
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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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// payload to send to TTN gateway
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static uint8_t payload[5];
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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 = 30;
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// Pin mapping for Adafruit Feather M0 LoRa
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const lmic_pinmap lmic_pins = {
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.nss = 8,
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.rxtx = LMIC_UNUSED_PIN,
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.rst = 4,
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.dio = {3, 6, LMIC_UNUSED_PIN},
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.rxtx_rx_active = 0,
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.rssi_cal = 8, // LBT cal for the Adafruit Feather M0 LoRa, in dB
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.spi_freq = 8000000,
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};
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// init. DHT
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DHT dht(DHTPIN, DHTTYPE);
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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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/*
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|| This event is defined but not used in the code. No
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|| point in wasting codespace on it.
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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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*/
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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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case EV_TXCOMPLETE:
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Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)"));
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if (LMIC.txrxFlags & TXRX_ACK)
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Serial.println(F("Received ack"));
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if (LMIC.dataLen) {
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Serial.println(F("Received "));
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Serial.println(LMIC.dataLen);
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Serial.println(F(" bytes of payload"));
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}
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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;
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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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/*
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|| This event is defined but not used in the code. No
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|| point in wasting codespace on it.
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|| case EV_SCAN_FOUND:
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|| Serial.println(F("EV_SCAN_FOUND"));
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|| break;
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*/
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case EV_TXSTART:
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Serial.println(F("EV_TXSTART"));
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break;
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default:
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Serial.print(F("Unknown event: "));
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Serial.println((unsigned) ev);
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break;
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}
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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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// read the temperature from the DHT22
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float temperature = dht.readTemperature();
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Serial.print("Temperature: "); Serial.print(temperature);
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Serial.println(" *C");
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// adjust for the f2sflt16 range (-1 to 1)
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temperature = temperature / 100;
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// read the humidity from the DHT22
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float rHumidity = dht.readHumidity();
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Serial.print("%RH ");
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Serial.println(rHumidity);
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// adjust for the f2sflt16 range (-1 to 1)
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rHumidity = rHumidity / 100;
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// float -> int
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// note: this uses the sflt16 datum (https://github.com/mcci-catena/arduino-lmic#sflt16)
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uint16_t payloadTemp = LMIC_f2sflt16(temperature);
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// int -> bytes
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byte tempLow = lowByte(payloadTemp);
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byte tempHigh = highByte(payloadTemp);
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// place the bytes into the payload
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payload[0] = tempLow;
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payload[1] = tempHigh;
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// float -> int
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uint16_t payloadHumid = LMIC_f2sflt16(rHumidity);
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// int -> bytes
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byte humidLow = lowByte(payloadHumid);
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byte humidHigh = highByte(payloadHumid);
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payload[2] = humidLow;
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payload[3] = humidHigh;
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// prepare upstream data transmission at the next possible time.
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// transmit on port 1 (the first parameter); you can use any value from 1 to 223 (others are reserved).
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// don't request an ack (the last parameter, if not zero, requests an ack from the network).
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// Remember, acks consume a lot of network resources; don't ask for an ack unless you really need it.
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LMIC_setTxData2(1, payload, sizeof(payload)-1, 0);
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}
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// Next TX is scheduled after TX_COMPLETE event.
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}
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void setup() {
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delay(5000);
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while (!Serial);
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Serial.begin(115200);
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delay(100);
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Serial.println(F("Starting"));
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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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// 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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// 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 (0x13, DEVADDR, nwkskey, appskey);
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// We'll disable all 72 channels used by TTN
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for (int c = 0; c < 72; c++){
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LMIC_disableChannel(c);
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}
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// We'll only enable Channel 16 (905.5Mhz) since we're transmitting on a single-channel
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LMIC_enableChannel(16);
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// Disable link check validation
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LMIC_setLinkCheckMode(0);
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// TTN uses SF9 for its RX2 window.
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LMIC.dn2Dr = DR_SF9;
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// Set data rate and transmit power for uplink (note: txpow seems to be ignored by the library)
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LMIC_setDrTxpow(DR_SF7,14);
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// Start job
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do_send(&sendjob);
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}
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void loop() {
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os_runloop_once();
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}
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