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LoRaGoDOCK-Gateway.ino
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LoRaGoDOCK-Gateway.ino
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/******************************************************************************************
*
* Description: Source code for single-channel LoRaWAN Gateway based on ESP8266 and SX1276
* Version : 0.8.1
* Date : 2018-01-25
* Software : https://github.com/SandboxElectronics/LoRaGoDOCK-Gateway
* Hardware : LoRaGo DOCK – http://sandboxelectronics.com/?product=lorago-dock-single-channel-lorawan-gateway
*
* Copyright (c) 2016, 2017 Maarten Westenberg
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the MIT License
* which accompanies this distribution, and is available at
* https://opensource.org/licenses/mit-license.php
*
*****************************************************************************************/
#include "config.h" // This file contains configuration of GWay
#include <Esp.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <cstdlib>
#include <sys/time.h>
#include <cstring>
#include <SPI.h>
#include <TimeLib.h> // http://playground.arduino.cc/code/time
#include <ESP8266WiFi.h>
#include <DNSServer.h> // Local DNSserver
#include "FS.h"
#include <WiFiUdp.h>
#include <pins_arduino.h>
#include <ArduinoJson.h>
#include <SimpleTimer.h>
#include <gBase64.h> // https://github.com/adamvr/arduino-base64 (changed the name)
#include <ESP8266mDNS.h>
extern "C" {
#include "user_interface.h"
#include "lwip/err.h"
#include "lwip/dns.h"
}
#include "loraModem.h"
#include "loraFiles.h"
#if WIFIMANAGER>0
#include <WiFiManager.h> // Library for ESP WiFi config through an AP
#endif
#if A_OTA==1
#include <ESP8266httpUpdate.h>
#include <ArduinoOTA.h>
#endif
#if A_SERVER==1
#include <ESP8266WebServer.h>
#endif
#if GATEWAYNODE==1
#include "AES-128_V10.h"
#endif
#if OLED==1
#include "SSD1306.h"
SSD1306 display(0x3c, OLED_SDA, OLED_SCL); // (i2c address of display(0x3c or 0x3d), SDA, SCL) on wemos
#endif
int debug=1; // Debug level! 0 is no msgs, 1 normal, 2 extensive
// You can switch webserver off if not necessary but probably better to leave it in.
#if A_SERVER==1
#include <Streaming.h> // http://arduiniana.org/libraries/streaming/
ESP8266WebServer server(A_SERVERPORT);
#endif
using namespace std;
byte currentMode = 0x81;
char b64[256];
bool sx1272 = true; // Actually we use sx1276/RFM95
uint32_t cp_nb_rx_rcv;
uint32_t cp_nb_rx_ok;
uint32_t cp_nb_rx_bad;
uint32_t cp_nb_rx_nocrc;
uint32_t cp_up_pkt_fwd;
uint8_t MAC_array[6];
// ----------------------------------------------------------------------------
//
// Configure these values only if necessary!
//
// ----------------------------------------------------------------------------
// Set spreading factor (SF7 - SF12)
sf_t sf = _SPREADING;
sf_t sfi = _SPREADING; // Initial value of SF
// Set location, description and other configuration parameters
// Defined in ESP-sc_gway.h
//
float lat = _LAT; // Configuration specific info...
float lon = _LON;
int alt = _ALT;
char platform[24] = _PLATFORM; // platform definition
char email[40] = _EMAIL; // used for contact email
char description[64]= _DESCRIPTION; // used for free form description
// define servers
IPAddress ntpServer; // IP address of NTP_TIMESERVER
IPAddress ttnServer; // IP Address of thethingsnetwork server
IPAddress thingServer;
WiFiUDP Udp;
uint32_t stattime = 0; // last time we sent a stat message to server
uint32_t pulltime = 0; // last time we sent a pull_data request to server
uint32_t lastTmst = 0;
#if A_SERVER==1
uint32_t wwwtime = 0;
#endif
#if NTP_INTR==0
uint32_t ntptimer = 0;
#endif
SimpleTimer timer; // Timer is needed for delayed sending
#define TX_BUFF_SIZE 1024 // Upstream buffer to send to MQTT
#define RX_BUFF_SIZE 1024 // Downstream received from MQTT
#define STATUS_SIZE 512 // Should(!) be enough based on the static text .. was 1024
uint8_t buff_down[RX_BUFF_SIZE]; // Buffer for downstream
uint16_t lastToken = 0x00;
#if GATEWAYNODE==1
uint16_t frameCount=0; // We write this to SPIFF file
#endif
// ----------------------------------------------------------------------------
// FORWARD DECARATIONS
// These forware declarations are done since _loraModem.ino is linked by the
// compiler/linker AFTER the main LoRaGoDOCK-Gateway.ino file.
// And espcesially when calling functions with ICACHE_RAM_ATTR the complier
// does not want this.
// ----------------------------------------------------------------------------
#if REENTRANT==2
uint8_t ICACHE_RAM_ATTR readRegister(uint8_t addr);
void ICACHE_RAM_ATTR writeRegister(uint8_t addr, uint8_t value);
void ICACHE_RAM_ATTR setFreq(uint32_t freq);
//void ICACHE_RAM_ATTR setRate(uint8_t sf, uint8_t crc);
void ICACHE_RAM_ATTR setPow(uint8_t powe);
void ICACHE_RAM_ATTR opmodeLora();
void ICACHE_RAM_ATTR opmode(uint8_t mode);
void ICACHE_RAM_ATTR rxLoraModem();
void ICACHE_RAM_ATTR initLoraModem();
uint8_t ICACHE_RAM_ATTR receivePkt(uint8_t *payload);
int ICACHE_RAM_ATTR receivePacket();
void ICACHE_RAM_ATTR cadScanner();
void ICACHE_RAM_ATTR Interrupt();
void ICACHE_RAM_ATTR Interrupt_0();
void ICACHE_RAM_ATTR Interrupt_1();
#endif
// ----------------------------------------------------------------------------
// DIE is not use actively in the source code anymore.
// It is replaced by a Serial.print command so we know that we have a problem
// somewhere.
// There are at least 3 other ways to restart the ESP. Pick one if you want.
// ----------------------------------------------------------------------------
void die(const char *s)
{
if (debug>0) Serial.println(s);
delay(50);
// system_restart(); // SDK function
// ESP.reset();
abort(); // Within a second
}
// ----------------------------------------------------------------------------
// gway_failed is a function called by ASSERT.
// ----------------------------------------------------------------------------
void gway_failed(const char *file, uint16_t line) {
Serial.print(F("Program failed in file: "));
Serial.print(file);
Serial.print(F(", line: "));
Serial.print(line);
}
// ----------------------------------------------------------------------------
// Print leading '0' digits for hours(0) and second(0) when
// printing values less than 10
// ----------------------------------------------------------------------------
void printDigits(unsigned long digits)
{
// utility function for digital clock display: prints leading 0
if(digits < 10)
Serial.print(F("0"));
Serial.print(digits);
}
// ----------------------------------------------------------------------------
// Print utin8_t values in HEX with leading 0 when necessary
// ----------------------------------------------------------------------------
void printHexDigit(uint8_t digit)
{
// utility function for printing Hex Values with leading 0
if(digit < 0x10)
Serial.print('0');
Serial.print(digit,HEX);
}
// ----------------------------------------------------------------------------
// Print the current time
// ----------------------------------------------------------------------------
static void printTime() {
switch (weekday())
{
case 1: Serial.print(F("Sunday")); break;
case 2: Serial.print(F("Monday")); break;
case 3: Serial.print(F("Tuesday")); break;
case 4: Serial.print(F("Wednesday")); break;
case 5: Serial.print(F("Thursday")); break;
case 6: Serial.print(F("Friday")); break;
case 7: Serial.print(F("Saturday")); break;
default: Serial.print(F("ERROR")); break;
}
Serial.print(F(" "));
printDigits(hour());
Serial.print(F(":"));
printDigits(minute());
Serial.print(F(":"));
printDigits(second());
return;
}
// ----------------------------------------------------------------------------
// Convert a float to string for printing
// f is value to convert
// p is precision in decimal digits
// val is character array for results
// ----------------------------------------------------------------------------
void ftoa(float f, char *val, int p) {
int j=1;
int ival, fval;
char b[6] = { 0x00 };
for (int i=0; i< p; i++) { j= j*10; }
ival = (int) f; // Make integer part
fval = (int) ((f- ival)*j); // Make fraction. Has same sign as integer part
if (fval<0) fval = -fval; // So if it is negative make fraction positive again.
// sprintf does NOT fit in memory
strcat(val,itoa(ival,b,10)); // Copy integer part first, base 10, null terminated
strcat(val,"."); // Copy decimal point
itoa(fval,b,10); // Copy fraction part
for (int i=0; i<(p-strlen(b)); i++) strcat(val,"0"); // first number of 0 of faction?
// Fraction can be anything from 0 to 10^p , so can have less digits
strcat(val,b);
}
// ============================================================================
// NTP TIME functions
const int NTP_PACKET_SIZE = 48; // Fixed size of NTP record
byte packetBuffer[NTP_PACKET_SIZE];
// ----------------------------------------------------------------------------
// Send the request packet to the NTP server.
//
// ----------------------------------------------------------------------------
void sendNTPpacket(IPAddress& timeServerIP) {
// Zeroise the buffer.
memset(packetBuffer, 0, NTP_PACKET_SIZE);
packetBuffer[0] = 0b11100011; // LI, Version, Mode
packetBuffer[1] = 0; // Stratum, or type of clock
packetBuffer[2] = 6; // Polling Interval
packetBuffer[3] = 0xEC; // Peer Clock Precision
// 8 bytes of zero for Root Delay & Root Dispersion
packetBuffer[12] = 49;
packetBuffer[13] = 0x4E;
packetBuffer[14] = 49;
packetBuffer[15] = 52;
Udp.beginPacket(timeServerIP, (int) 123); // NTP Server and Port
if ((Udp.write((char *)packetBuffer, NTP_PACKET_SIZE)) != NTP_PACKET_SIZE) {
die("sendNtpPacket:: Error write");
}
else {
// Success
}
Udp.endPacket();
}
// ----------------------------------------------------------------------------
// Get the NTP time from one of the time servers
// Note: As this function is called from SyncINterval in the background
// make sure we have no blocking calls in this function
// ----------------------------------------------------------------------------
time_t getNtpTime()
{
gwayConfig.ntps++;
WiFi.hostByName(NTP_TIMESERVER, ntpServer); // Get IP address of Timeserver
sendNTPpacket(ntpServer); // Send the request
uint32_t beginWait = millis();
while (millis() - beginWait < 1000)
{
int size = Udp.parsePacket();
if ( size >= NTP_PACKET_SIZE ) {
Udp.read(packetBuffer, NTP_PACKET_SIZE);
// Extract seconds portion.
unsigned long secs;
secs = packetBuffer[40] << 24;
secs |= packetBuffer[41] << 16;
secs |= packetBuffer[42] << 8;
secs |= packetBuffer[43];
Udp.flush();
return secs - 2208988800UL + NTP_TIMEZONES * SECS_PER_HOUR;
// UTC is 1 TimeZone correction when no daylight saving time
}
delay(10); // Wait 10 millisecs, allow kernel to act when necessary
}
Udp.flush();
// If we are here, we could not read the time from internet
// So increase the counter
gwayConfig.ntpErr++;
return 0; // return 0 if unable to get the time
}
// ----------------------------------------------------------------------------
// Set up regular synchronization of NTP server and the local time.
// ----------------------------------------------------------------------------
#if NTP_INTR==1
void setupTime() {
setSyncProvider(getNtpTime);
setSyncInterval(_NTP_INTERVAL);
}
#endif
// ============================================================================
// UDP AND WLAN FUNCTIONS
// ----------------------------------------------------------------------------
// GET THE DNS SERVER IP address
// ----------------------------------------------------------------------------
IPAddress getDnsIP() {
ip_addr_t dns_ip = dns_getserver(0);
IPAddress dns = IPAddress(dns_ip.addr);
return((IPAddress) dns);
}
// ----------------------------------------------------------------------------
// Prepare the Config Parameters
// ----------------------------------------------------------------------------
int WlanReadWpa() {
readConfig( CONFIGFILE, &gwayConfig);
if (gwayConfig.sf != (uint8_t)0) {
sf = (sf_t) gwayConfig.sf;
}
ifreq = gwayConfig.ch;
freq = freqs[ifreq];
debug = gwayConfig.debug;
_cad = gwayConfig.cad;
_hop = gwayConfig.hop;
gwayConfig.boots++; // Every boot of the system we increase the reset
#if GATEWAYNODE==1
if (gwayConfig.fcnt != (uint8_t) 0) frameCount = gwayConfig.fcnt+10;
#endif
#if WIFIMANAGER > 0
String ssid=gwayConfig.ssid;
String pass=gwayConfig.pass;
char ssidBuf[ssid.length()+1];
ssid.toCharArray(ssidBuf,ssid.length()+1);
char passBuf[pass.length()+1];
pass.toCharArray(passBuf,pass.length()+1);
Serial.print(F("WlanReadWpa: ")); Serial.print(ssidBuf); Serial.print(F(", ")); Serial.println(passBuf);
strcpy(wpa[0].login, ssidBuf); // XXX changed from wpa[0][0] = ssidBuf
strcpy(wpa[0].passw, passBuf);
Serial.print(F("WlanReadWpa: <"));
Serial.print(wpa[0].login); // XXX
Serial.print(F(">, <"));
Serial.print(wpa[0].passw);
Serial.println(F(">"));
#endif
}
// ----------------------------------------------------------------------------
// Print the WPA data of last WiFiManager to file
// ----------------------------------------------------------------------------
int WlanWriteWpa( char* ssid, char *pass) {
Serial.print(F("WlanWriteWpa:: ssid=")); Serial.print(ssid);
Serial.print(F(", pass=")); Serial.print(pass); Serial.println();
// Version 3.3 use of config file
String s((char *) ssid);
gwayConfig.ssid = s;
String p((char *) pass);
gwayConfig.pass = p;
#if GATEWAYNODE==1
gwayConfig.fcnt = frameCount;
#endif
gwayConfig.ch = ifreq;
gwayConfig.sf = sf;
gwayConfig.cad = _cad;
gwayConfig.hop = _hop;
writeConfig( CONFIGFILE, &gwayConfig);
}
// ----------------------------------------------------------------------------
// Function to join the Wifi Network
// It is a matter of returning to the main loop() asap and make sure in next loop
// the reconnect is done first thing.
// ----------------------------------------------------------------------------
int WlanConnect() {
#if WIFIMANAGER==1
WiFiManager wifiManager;
#endif
unsigned char agains = 0;
unsigned char wpa_index = (WIFIMANAGER >0 ? 0 : 1); // Skip over first record for WiFiManager
// Serial.print(F("WlanConnect:: wpa_index=")); Serial.println(wpa_index);
while (WiFi.status() != WL_CONNECTED)
{
// Start with well-known access points in the list
char *ssid = wpa[wpa_index].login;
char *password = wpa[wpa_index].passw;
// Serial.print(wpa_index); Serial.print(F(". WiFi connect to: ")); Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(agains*400);
agains++;
if (debug>=2) Serial.print(".");
yield();
// If after 10 times there is still no connection, we probably wait forever
// So restart the WiFI.begin process!!
if (agains == 10) {
agains = 0;
WiFi.disconnect();
//yield();
delay(500);
break;
}
}
wpa_index++;
//if (wpa_index >= WPASIZE) { break; }
if (wpa_index >= (sizeof(wpa)/sizeof(wpa[0]))) {
wpa_index = (WIFIMANAGER >0 ? 0 : 1);
break;
}
}
// Still not connected?
if (WiFi.status() != WL_CONNECTED) {
#if WIFIMANAGER==1
Serial.println(F("Starting Access Point Mode"));
Serial.print(F("Connect Wifi to accesspoint: "));
Serial.print(AP_NAME);
Serial.print(F(" and connect to IP: 192.168.4.1"));
Serial.println();
wifiManager.autoConnect(AP_NAME, AP_PASSWD );
//wifiManager.startConfigPortal(AP_NAME, AP_PASSWD );
// At this point, there IS a Wifi Access Point found and connected
// We must connect to the local SPIFFS storage to store the access point
//String s = WiFi.SSID();
//char ssidBuf[s.length()+1];
//s.toCharArray(ssidBuf,s.length()+1);
// Now look for the password
struct station_config sta_conf;
wifi_station_get_config(&sta_conf);
//WlanWriteWpa(ssidBuf, (char *)sta_conf.password);
WlanWriteWpa((char *)sta_conf.ssid, (char *)sta_conf.password);
#else
return(-1);
#endif
}
#if STATISTICS>=1
gwayConfig.wifis++;
#endif
Serial.print(F("WiFi connected to "));
Serial.println(WiFi.SSID());
Serial.print(F("IP Addr: "));
Serial.println(WiFi.localIP());
yield();
return(0);
}
// ----------------------------------------------------------------------------
// Read DOWN a package from UDP socket, can come from any server
// Messages are received when server responds to gateway requests from LoRa nodes
// (e.g. JOIN requests etc.) or when server has downstream data.
// We repond only to the server that sent us a message!
// Note: So normally we can forget here about codes that do upstream
// ----------------------------------------------------------------------------
int readUdp(int packetSize, uint8_t * buff_down)
{
uint8_t protocol;
uint16_t token;
uint8_t ident;
uint8_t buff[64]; // General buffer to use for UDP
if (WiFi.status() != WL_CONNECTED) {
Serial.println(F("readUdp: ERROR not connected to WLAN"));
Serial.flush();
Udp.flush();
if (WlanConnect() < 0) {
Serial.print(F("readdUdp: ERROR connecting to WiFi"));
yield();
return(-1);
}
if (debug>0) Serial.println(F("WiFi reconnected"));
delay(10);
}
if (packetSize > RX_BUFF_SIZE) {
Serial.print(F("readUDP:: ERROR package of size: "));
Serial.println(packetSize);
Udp.flush();
return(-1);
}
Udp.read(buff_down, packetSize);
IPAddress remoteIpNo = Udp.remoteIP();
unsigned int remotePortNo = Udp.remotePort();
uint8_t * data = buff_down + 4;
protocol = buff_down[0];
token = buff_down[2]*256 + buff_down[1];
ident = buff_down[3];
// now parse the message type from the server (if any)
switch (ident) {
// This message is used by the gateway to send sensor data to the
// server. As this function is used for downstream only, this option
// will never be selected but is included as a reference only
case PKT_PUSH_DATA: // 0x00 UP
if (debug >=1) {
Serial.print(F("PKT_PUSH_DATA:: size ")); Serial.print(packetSize);
Serial.print(F(" From ")); Serial.print(remoteIpNo);
Serial.print(F(", port ")); Serial.print(remotePortNo);
Serial.print(F(", data: "));
for (int i=0; i<packetSize; i++) {
Serial.print(buff_down[i],HEX);
Serial.print(':');
}
Serial.println();
}
break;
// This message is sent by the server to acknoledge receipt of a
// (sensor) message sent with the code above.
case PKT_PUSH_ACK: // 0x01 DOWN
if (debug >= 2) {
Serial.print(F("PKT_PUSH_ACK:: size ")); Serial.print(packetSize);
Serial.print(F(" From ")); Serial.print(remoteIpNo);
Serial.print(F(", port ")); Serial.print(remotePortNo);
Serial.print(F(", token: "));
Serial.println(token, HEX);
Serial.println();
}
break;
case PKT_PULL_DATA: // 0x02 UP
Serial.print(F(" Pull Data"));
Serial.println();
break;
// This message type is used to confirm OTAA message to the node
// XXX This message format may also be used for other downstream communucation
case PKT_PULL_RESP: // 0x03 DOWN
lastTmst = micros(); // Store the tmst this package was received
// Send to the LoRa Node first (timing) and then do messaging
if (sendPacket(data, packetSize-4) < 0) {
return(-1);
}
// Now respond with an PKT_PULL_ACK; 0x04 UP
buff[0]=buff_down[0];
buff[1]=buff_down[1];
buff[2]=buff_down[2];
//buff[3]=PKT_PULL_ACK; // Pull request/Change of Mogyi
buff[3]=PKT_TX_ACK;
buff[4]=MAC_array[0];
buff[5]=MAC_array[1];
buff[6]=MAC_array[2];
buff[7]=0xFF;
buff[8]=0xFF;
buff[9]=MAC_array[3];
buff[10]=MAC_array[4];
buff[11]=MAC_array[5];
buff[12]=0;
// Only send the PKT_PULL_ACK to the UDP socket that just sent the data!!!
Udp.beginPacket(remoteIpNo, remotePortNo);
if (Udp.write((char *)buff, 12) != 12) {
Serial.println("PKT_PULL_ACK:: Error writing Ack");
}
else {
if (debug>=1) {
Serial.print(F("PKT_TX_ACK:: tmst="));
Serial.println(micros());
}
}
//yield();
Udp.endPacket();
if (debug >=1) {
Serial.print(F("PKT_PULL_RESP:: size ")); Serial.print(packetSize);
Serial.print(F(" From ")); Serial.print(remoteIpNo);
Serial.print(F(", port ")); Serial.print(remotePortNo);
Serial.print(F(", data: "));
data = buff_down + 4;
data[packetSize] = 0;
Serial.print((char *)data);
Serial.println(F("..."));
}
break;
case PKT_PULL_ACK: // 0x04 DOWN; the server sends a PULL_ACK to confirm PULL_DATA receipt
if (debug >= 2) {
Serial.print(F("PKT_PULL_ACK:: size ")); Serial.print(packetSize);
Serial.print(F(" From ")); Serial.print(remoteIpNo);
Serial.print(F(", port ")); Serial.print(remotePortNo);
Serial.print(F(", data: "));
for (int i=0; i<packetSize; i++) {
Serial.print(buff_down[i],HEX);
Serial.print(':');
}
Serial.println();
}
break;
default:
#if GATEWAYMGT==1
// For simplicity, we send the first 4 bytes too
gateway_mgt(packetSize, buff_down);
#else
#endif
Serial.print(F(", ERROR ident not recognized: "));
Serial.println(ident);
break;
}
// For downstream messages, fill the buff_down buffer
return packetSize;
}
// ----------------------------------------------------------------------------
// Send UP an UDP/DGRAM message to the MQTT server
// If we send to more than one host (not sure why) then we need to set sockaddr
// before sending.
// ----------------------------------------------------------------------------
void sendUdp(uint8_t * msg, int length) {
int l;
lastToken = msg[2]*256+msg[1];
if (WiFi.status() != WL_CONNECTED) {
Serial.println(F("sendUdp: ERROR not connected to WLAN"));
Serial.flush();
Udp.flush();
if (WlanConnect() < 0) {
Serial.print(F("sendUdp: ERROR connecting to WiFi"));
yield();
return;
}
if (debug>0) Serial.println(F("WiFi reconnected"));
delay(10);
}
//send the update
Udp.beginPacket(ttnServer, (int) _TTNPORT);
if ((l = Udp.write((char *)msg, length)) != length) {
Serial.println("sendUdp:: Error write");
}
else {
if (debug>=3) {
Serial.print(F("sendUdp 1: sent "));
Serial.print(l);
Serial.println(F(" bytes"));
}
}
yield();
Udp.endPacket();
#ifdef _THINGSERVER
delay(1);
Udp.beginPacket(thingServer, (int) _THINGPORT);
if ((l = Udp.write((char *)msg, length)) != length) {
Serial.println("sendUdp:: Error write");
}
else {
if (debug>=3) {
Serial.print(F("sendUdp 2: sent "));
Serial.print(l);
Serial.println(F(" bytes"));
}
}
yield();
Udp.endPacket();
#endif
return;
}
// ----------------------------------------------------------------------------
// connect to UDP – returns true if successful or false if not
// ----------------------------------------------------------------------------
bool UDPconnect() {
bool ret = false;
unsigned int localPort = _LOCUDPPORT; // To listen to return messages from WiFi
if (debug>=1) {
Serial.print(F("Local UDP port "));
Serial.println(localPort);
}
if (Udp.begin(localPort) == 1) {
if (debug>=1) Serial.println(F("Connection successful"));
ret = true;
}
else{
//Serial.println("Connection failed");
}
return(ret);
}
// ----------------------------------------------------------------------------
// Send UP periodic Pull_DATA message to server to keepalive the connection
// and to invite the server to send downstream messages when these are available
// *2, par. 5.2
// - Protocol Version (1 byte)
// - Random Token (2 bytes)
// - PULL_DATA identifier (1 byte) = 0x02
// - Gateway unique identifier (8 bytes) = MAC address
// ----------------------------------------------------------------------------
void pullData() {
uint8_t pullDataReq[13]; // status report as a JSON object
int pullIndex=0;
int i;
// pre-fill the data buffer with fixed fields
pullDataReq[0] = PROTOCOL_VERSION; // 0x01
uint8_t token_h = (uint8_t)rand(); // random token
uint8_t token_l = (uint8_t)rand(); // random token
pullDataReq[1] = token_h;
pullDataReq[2] = token_l;
pullDataReq[3] = PKT_PULL_DATA; // 0x02
// READ MAC ADDRESS OF ESP8266, and return unique Gateway ID consisting of MAC address and 2bytes 0xFF
pullDataReq[4] = MAC_array[0];
pullDataReq[5] = MAC_array[1];
pullDataReq[6] = MAC_array[2];
pullDataReq[7] = 0xFF;
pullDataReq[8] = 0xFF;
pullDataReq[9] = MAC_array[3];
pullDataReq[10] = MAC_array[4];
pullDataReq[11] = MAC_array[5];
pullIndex = 12; // 12-byte header
pullDataReq[pullIndex] = 0; // add string terminator, for safety
if (debug>= 2) {
Serial.print(F("PKT_PULL_DATA request: <"));
Serial.print(pullIndex);
Serial.print(F("> "));
for (i=0; i<pullIndex; i++) {
Serial.print(pullDataReq[i],HEX); // DEBUG: display JSON stat
Serial.print(':');
}
Serial.println();
}
//send the update
sendUdp(pullDataReq, pullIndex);
}
// ----------------------------------------------------------------------------
// Send UP periodic status message to server even when we do not receive any
// data.
// Parameters:
// - <none>
// ----------------------------------------------------------------------------
void sendstat() {
uint8_t status_report[STATUS_SIZE]; // status report as a JSON object
char stat_timestamp[32]; // XXX was 24
time_t t;
char clat[10]={0};
char clon[10]={0};
int stat_index=0;
uint8_t token_h = (uint8_t)rand(); // random token
uint8_t token_l = (uint8_t)rand(); // random token
// pre-fill the data buffer with fixed fields
status_report[0] = PROTOCOL_VERSION; // 0x01
status_report[1] = token_h;
status_report[2] = token_l;
status_report[3] = PKT_PUSH_DATA; // 0x00
// READ MAC ADDRESS OF ESP8266, and return unique Gateway ID consisting of MAC address and 2bytes 0xFF
status_report[4] = MAC_array[0];
status_report[5] = MAC_array[1];
status_report[6] = MAC_array[2];
status_report[7] = 0xFF;
status_report[8] = 0xFF;
status_report[9] = MAC_array[3];
status_report[10] = MAC_array[4];
status_report[11] = MAC_array[5];
stat_index = 12; // 12-byte header
t = now(); // get timestamp for statistics
// XXX Using CET as the current timezone. Change to your timezone
sprintf(stat_timestamp, "%04d-%02d-%02d %02d:%02d:%02d CET", year(),month(),day(),hour(),minute(),second());
yield();
ftoa(lat,clat,5); // Convert lat to char array with 5 decimals
ftoa(lon,clon,5); // As Arduino CANNOT prints floats
// Build the Status message in JSON format, XXX Split this one up...
delay(1);
int j = snprintf((char *)(status_report + stat_index), STATUS_SIZE-stat_index,
"{\"stat\":{\"time\":\"%s\",\"lati\":%s,\"long\":%s,\"alti\":%i,\"rxnb\":%u,\"rxok\":%u,\"rxfw\":%u,\"ackr\":%u.0,\"dwnb\":%u,\"txnb\":%u,\"pfrm\":\"%s\",\"mail\":\"%s\",\"desc\":\"%s\"}}",
stat_timestamp, clat, clon, (int)alt, cp_nb_rx_rcv, cp_nb_rx_ok, cp_up_pkt_fwd, 0, 0, 0,platform,email,description);
yield(); // Give way to the internal housekeeping of the ESP8266
if (debug >=1) { delay(1); }
stat_index += j;
status_report[stat_index] = 0; // add string terminator, for safety
if (debug>=2) {
Serial.print(F("stat update: <"));
Serial.print(stat_index);
Serial.print(F("> "));
Serial.println((char *)(status_report+12)); // DEBUG: display JSON stat
}
if (stat_index > STATUS_SIZE) {
Serial.println(F("sendstat:: ERROR buffer too big"));
return;
}
//send the update
sendUdp(status_report, stat_index);
return;
}
void setup() {
Serial.begin(_BAUDRATE);
Serial.flush();
Serial.println();
delay(100);
if (!SPIFFS.begin()) {
Serial.println(F("Failed to load SPIFFS"));
}
#if OLED==1
// Initialising the UI will init the display too.
display.init();
display.flipScreenVertically();
display.setFont(ArialMT_Plain_24);
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.drawString(0, 24, "STARTING");
display.display();
#endif
WiFi.mode(WIFI_STA);
WlanReadWpa(); // Read the last Wifi settings from SPIFFS into memory
WiFi.macAddress(MAC_array);
Serial.print(F("MAC Addr: "));
for (int i=0; i<6; i++) {
printf("%02X", MAC_array[i]);
if (i<5) {
Serial.print("-");
} else {
Serial.println();
}
}
// We start by connecting to a WiFi network, set hostname
char hostname[12];
sprintf(hostname, "LoRaGo-%02X%02X%02X", MAC_array[3], MAC_array[4], MAC_array[5]);
wifi_station_set_hostname(hostname);
// Setup WiFi UDP connection. Give it some time ..
while (WlanConnect() < 0) {
Serial.println(F("[Error]: Failed to connect to Wifi network"));
yield();
}
// Test the UDP function
if (!UDPconnect()) {
Serial.println(F("Error UDPconnect"));
}
// Pins are defined and set in loraModem.h
pinMode(pins.ss, OUTPUT);
pinMode(pins.rst, OUTPUT);
pinMode(pins.dio0, INPUT); // This pin is interrupt
pinMode(pins.dio1, INPUT); // This pin is interrupt
SPI.begin();
SPI.setFrequency( SPIFREQ ); // <=10 MHz
delay(500);
// We choose the Gateway ID to be the Ethernet Address of our Gateway card
// display results of getting hardware address
//
Serial.print("Gateway ID: ");
printHexDigit(MAC_array[0]);
printHexDigit(MAC_array[1]);
printHexDigit(MAC_array[2]);
printHexDigit(0xFF);
printHexDigit(0xFF);
printHexDigit(MAC_array[3]);
printHexDigit(MAC_array[4]);
printHexDigit(MAC_array[5]);
Serial.print(", Listening at SF");
Serial.print(sf);
Serial.print(" on ");
Serial.print((double)freq/1000000);
Serial.println(" Mhz.");
WiFi.hostByName(_TTNSERVER, ttnServer); // Use DNS to get server IP once
delay(500);
#ifdef _THINGSERVER
WiFi.hostByName(_THINGSERVER, thingServer);
delay(500);
#endif
#if NTP_INTR==1
setupTime(); // Set NTP time host and interval
#endif
setTime((time_t)getNtpTime());
while (timeStatus() == timeNotSet) {
Serial.println(F("setupTime:: Time not set (yet)"));
delay(500);
setTime((time_t)getNtpTime());
}
Serial.print("Time: "); printTime();