因此，我从 Adafruit 获得了一个名为 Feather m0 (900MHz) 的新 LoRa 模块。我尝试运行修改后的示例代码，但无法向实时服务器发送“加入请求”。正如示例代码所建议的那样，除了 Io1 之外，我还没有真正将任何东西连接到引脚 6，所以我想知道是否有人知道我的代码有什么问题？或者如果我需要以不同的方式写它？请注意，密钥不再有效，因此是否显示它们并不重要。以下代码修改为仅发送编码数字“18”。
/*******************************************************************************
* The Things Network - Sensor Data Example
*
* Example of sending a valid LoRaWAN packet with DHT22 temperature and
* humidity data to The Things Networ using a Feather M0 LoRa.
*
* Learn Guide: https://learn.adafruit.com/the-things-network-for-feather
*
* Copyright (c) 2015 Thomas Telkamp and Matthijs Kooijman
* Copyright (c) 2018 Terry Moore, MCCI
* Copyright (c) 2018 Brent Rubell, Adafruit Industries
*
* Permission is hereby granted, free of charge, to anyone
* obtaining a copy of this document and accompanying files,
* to do whatever they want with them without any restriction,
* including, but not limited to, copying, modification and redistribution.
* NO WARRANTY OF ANY KIND IS PROVIDED.
*******************************************************************************/
#include <lmic.h>
#include <hal/hal.h>
#include <SPI.h>
//
// For normal use, we require that you edit the sketch to replace FILLMEIN
// with values assigned by the TTN console. However, for regression tests,
// we want to be able to compile these scripts. The regression tests define
// COMPILE_REGRESSION_TEST, and in that case we define FILLMEIN to a non-
// working but innocuous value.
//
// This EUI must be in little-endian format, so least-significant-byte
// first. When copying an EUI from ttnctl output, this means to reverse
// the bytes. For TTN issued EUIs the last bytes should be 0xD5, 0xB3,
// 0x70.
static const u1_t PROGMEM APPEUI[8] = { 0x70, 0xB3, 0xD7, 0x7E, 0xD0, 0x04, 0x0C, 0xA6 } ;
void os_getArtEui (u1_t* buf) { memcpy_P(buf, APPEUI, 8);}
// This should also be in little endian format, see above.
static const u1_t PROGMEM DEVEUI[8] = { 0x00, 0x53, 0x9C, 0x7B, 0x6C, 0xA5, 0x4C, 0xED } ;
void os_getDevEui (u1_t* buf) { memcpy_P(buf, DEVEUI, 8);}
// This key should be in big endian format (or, since it is not really a
// number but a block of memory, endianness does not really apply). In
// practice, a key taken from the TTN console can be copied as-is.
static const u1_t PROGMEM APPKEY[16] = { 0x8A, 0x16, 0xE7, 0x7D, 0x10, 0x74, 0x0D, 0x47, 0x19, 0x3C, 0xE5, 0x3F, 0x82, 0xF2, 0x65, 0x10 };
void os_getDevKey (u1_t* buf) { memcpy_P(buf, APPKEY, 16);}
// payload to send to TTN gateway
static uint8_t payload[5];
static osjob_t sendjob;
// Schedule TX every this many seconds (might become longer due to duty
// cycle limitations).
const unsigned TX_INTERVAL = 60;
// Pin mapping for Adafruit Feather M0 LoRa
const lmic_pinmap lmic_pins = {
.nss = 8,
.rxtx = LMIC_UNUSED_PIN,
.rst = 4,
.dio = {3, 6, LMIC_UNUSED_PIN},
.rxtx_rx_active = 0,
.rssi_cal = 8, // LBT cal for the Adafruit Feather M0 LoRa, in dB
.spi_freq = 8000000,
};
// init. DHT
void printHex2(unsigned v) {
v &= 0xff;
if (v < 16)
Serial.print('0');
Serial.print(v, HEX);
}
void onEvent (ev_t ev) {
Serial.print(os_getTime());
Serial.print(": ");
switch(ev) {
case EV_SCAN_TIMEOUT:
Serial.println(F("EV_SCAN_TIMEOUT"));
break;
case EV_BEACON_FOUND:
Serial.println(F("EV_BEACON_FOUND"));
break;
case EV_BEACON_MISSED:
Serial.println(F("EV_BEACON_MISSED"));
break;
case EV_BEACON_TRACKED:
Serial.println(F("EV_BEACON_TRACKED"));
break;
case EV_JOINING:
Serial.println(F("EV_JOINING"));
break;
case EV_JOINED:
Serial.println(F("EV_JOINED"));
{
u4_t netid = 0;
devaddr_t devaddr = 0;
u1_t nwkKey[16];
u1_t artKey[16];
LMIC_getSessionKeys(&netid, &devaddr, nwkKey, artKey);
Serial.print("netid: ");
Serial.println(netid, DEC);
Serial.print("devaddr: ");
Serial.println(devaddr, HEX);
Serial.print("AppSKey: ");
for (size_t i=0; i<sizeof(artKey); ++i) {
if (i != 0)
Serial.print("-");
printHex2(artKey[i]);
}
Serial.println("");
Serial.print("NwkSKey: ");
for (size_t i=0; i<sizeof(nwkKey); ++i) {
if (i != 0)
Serial.print("-");
printHex2(nwkKey[i]);
}
Serial.println();
}
// Disable link check validation (automatically enabled
// during join, but because slow data rates change max TX
// size, we don't use it in this example.
LMIC_setLinkCheckMode(0);
break;
/*
|| This event is defined but not used in the code. No
|| point in wasting codespace on it.
||
|| case EV_RFU1:
|| Serial.println(F("EV_RFU1"));
|| break;
*/
case EV_JOIN_FAILED:
Serial.println(F("EV_JOIN_FAILED"));
break;
case EV_REJOIN_FAILED:
Serial.println(F("EV_REJOIN_FAILED"));
break;
break;
case EV_TXCOMPLETE:
Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)"));
if (LMIC.txrxFlags & TXRX_ACK)
Serial.println(F("Received ack"));
if (LMIC.dataLen) {
Serial.println(F("Received "));
Serial.println(LMIC.dataLen);
Serial.println(F(" bytes of payload"));
}
// Schedule next transmission
os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(TX_INTERVAL), do_send);
break;
case EV_LOST_TSYNC:
Serial.println(F("EV_LOST_TSYNC"));
break;
case EV_RESET:
Serial.println(F("EV_RESET"));
break;
case EV_RXCOMPLETE:
// data received in ping slot
Serial.println(F("EV_RXCOMPLETE"));
break;
case EV_LINK_DEAD:
Serial.println(F("EV_LINK_DEAD"));
break;
case EV_LINK_ALIVE:
Serial.println(F("EV_LINK_ALIVE"));
break;
/*
|| This event is defined but not used in the code. No
|| point in wasting codespace on it.
||
|| case EV_SCAN_FOUND:
|| Serial.println(F("EV_SCAN_FOUND"));
|| break;
*/
case EV_TXSTART:
Serial.println(F("EV_TXSTART"));
break;
case EV_TXCANCELED:
Serial.println(F("EV_TXCANCELED"));
break;
case EV_RXSTART:
/* do not print anything -- it wrecks timing */
break;
case EV_JOIN_TXCOMPLETE:
Serial.println(F("EV_JOIN_TXCOMPLETE: no JoinAccept"));
break;
default:
Serial.print(F("Unknown event: "));
Serial.println((unsigned) ev);
break;
}
}
void do_send(osjob_t* j){
// Check if there is not a current TX/RX job running
if (LMIC.opmode & OP_TXRXPEND) {
Serial.println(F("OP_TXRXPEND, not sending"));
} else {
// read the temperature from the DHT22
float temperature = 18;
Serial.print("Temperature: "); Serial.print(temperature);
Serial.println(" *C");
// adjust for the f2sflt16 range (-1 to 1)
temperature = temperature / 100;
// float -> int
// note: this uses the sflt16 datum (https://github.com/mcci-catena/arduino-lmic#sflt16)
uint16_t payloadTemp = LMIC_f2sflt16(temperature);
// int -> bytes
byte tempLow = lowByte(payloadTemp);
byte tempHigh = highByte(payloadTemp);
// place the bytes into the payload
payload[0] = tempLow;
payload[1] = tempHigh;
// prepare upstream data transmission at the next possible time.
// transmit on port 1 (the first parameter); you can use any value from 1 to 223 (others are reserved).
// don't request an ack (the last parameter, if not zero, requests an ack from the network).
// Remember, acks consume a lot of network resources; don't ask for an ack unless you really need it.
LMIC_setTxData2(1, payload, sizeof(payload)-1, 0);
}
// Next TX is scheduled after TX_COMPLETE event.
}
void setup() {
delay(5000);
while (! Serial);
Serial.begin(9600);
Serial.println(F("Starting"));
// LMIC init
os_init();
// Reset the MAC state. Session and pending data transfers will be discarded.
LMIC_reset();
// Disable link-check mode and ADR, because ADR tends to complicate testing.
LMIC_setLinkCheckMode(0);
// Set the data rate to Spreading Factor 7. This is the fastest supported rate for 125 kHz channels, and it
// minimizes air time and battery power. Set the transmission power to 14 dBi (25 mW).
LMIC_setDrTxpow(DR_SF7,14);
// in the US, with TTN, it saves join time if we start on subband 1 (channels 8-15). This will
// get overridden after the join by parameters from the network. If working with other
// networks or in other regions, this will need to be changed.
//LMIC_selectSubBand(1);
// Start job (sending automatically starts OTAA too)
do_send(&sendjob);
}
void loop() {
// we call the LMIC's runloop processor. This will cause things to happen based on events and time. One
// of the things that will happen is callbacks for transmission complete or received messages. We also
// use this loop to queue periodic data transmissions. You can put other things here in the `loop()` routine,
// but beware that LoRaWAN timing is pretty tight, so if you do more than a few milliseconds of work, you
// will want to call `os_runloop_once()` every so often, to keep the radio running.
os_runloop_once();
}