Hello,
I am trying to send the Temperature and humidity data to the Lora gateway. I am using 5005-0 as a base board and 4631 as a core. I am using Rak1920 and connected Grove’s SHT31(Temp. & humidity) sensor with it. I have uploaded the following code to get the data locally on arduino IDE. Code;
**#include <Wire.h>**
**#include "SHT31.h"**
**SHT31 sht31 = SHT31();**
**void setup() { **
** Serial.begin(9600);**
** while(!Serial);**
** Serial.println("begin..."); **
** sht31.begin(); **
**}**
**void loop() {**
** float temp = sht31.getTemperature();**
** int temp1 = temp*100;**
** float hum = sht31.getHumidity();**
** int hum1 = hum*100;**
** Serial.print("Temp = "); **
** Serial.print(temp1);**
** Serial.println(" C"); //The unit for Celsius because original arduino don't support speical symbols**
** Serial.print("Hum = "); **
** Serial.print(hum1);**
** Serial.println("%"); **
** Serial.println();**
** delay(1000);**
**}**
This code gives me accurate data on serial monitor. So, sensor is working just fine.
After that, I tried to send the data to the cloud via a gateway. I used the following code;
/**
* @file LoRaWAN_OTAA_ABP.ino
* @author rakwireless.com
* @brief LoRaWan node example with OTAA/ABP registration
* @version 0.1
* @date 2020-08-21
*
* @copyright Copyright (c) 2020
*
* @note RAK4631 GPIO mapping to nRF52840 GPIO ports
RAK4631 <-> nRF52840
WB_IO1 <-> P0.17 (GPIO 17)
WB_IO2 <-> P1.02 (GPIO 34)
WB_IO3 <-> P0.21 (GPIO 21)
WB_IO4 <-> P0.04 (GPIO 4)
WB_IO5 <-> P0.09 (GPIO 9)
WB_IO6 <-> P0.10 (GPIO 10)
WB_SW1 <-> P0.01 (GPIO 1)
WB_A0 <-> P0.04/AIN2 (AnalogIn A2)
WB_A1 <-> P0.31/AIN7 (AnalogIn A7)
*/
#include <Arduino.h>
#include <LoRaWan-RAK4630.h> //http://librarymanager/All#SX126x
#include <SPI.h>
#include <Wire.h>
#include "SHT31.h"
SHT31 sht31 = SHT31();
// RAK4630 supply two LED
#ifndef LED_BUILTIN
#define LED_BUILTIN 35
#endif
#ifndef LED_BUILTIN2
#define LED_BUILTIN2 36
#endif
bool doOTAA = true; // OTAA is used by default.
#define SCHED_MAX_EVENT_DATA_SIZE APP_TIMER_SCHED_EVENT_DATA_SIZE /**< Maximum size of scheduler events. */
#define SCHED_QUEUE_SIZE 60 /**< Maximum number of events in the scheduler queue. */
#define LORAWAN_DATERATE DR_0 /*LoRaMac datarates definition, from DR_0 to DR_5*/
#define LORAWAN_TX_POWER TX_POWER_5 /*LoRaMac tx power definition, from TX_POWER_0 to TX_POWER_15*/
#define JOINREQ_NBTRIALS 3 /**< Number of trials for the join request. */
DeviceClass_t g_CurrentClass = CLASS_A; /* class definition*/
LoRaMacRegion_t g_CurrentRegion = LORAMAC_REGION_US915; /* Region:EU868*/
lmh_confirm g_CurrentConfirm = LMH_CONFIRMED_MSG; /* confirm/unconfirm packet definition*/
uint8_t gAppPort = LORAWAN_APP_PORT; /* data port*/
//Serial.println("Stage : A1");
/**@brief Structure containing LoRaWan parameters, needed for lmh_init()
*/
static lmh_param_t g_lora_param_init = {LORAWAN_ADR_ON, LORAWAN_DATERATE, LORAWAN_PUBLIC_NETWORK, JOINREQ_NBTRIALS, LORAWAN_TX_POWER, LORAWAN_DUTYCYCLE_OFF};
// Foward declaration
static void lorawan_has_joined_handler(void);
static void lorawan_join_failed_handler(void);
static void lorawan_rx_handler(lmh_app_data_t *app_data);
static void lorawan_confirm_class_handler(DeviceClass_t Class);
static void send_lora_frame(void);
// Serial.println("Stage : A2");
/**@brief Structure containing LoRaWan callback functions, needed for lmh_init()
*/
static lmh_callback_t g_lora_callbacks = {BoardGetBatteryLevel, BoardGetUniqueId, BoardGetRandomSeed,
lorawan_rx_handler, lorawan_has_joined_handler, lorawan_confirm_class_handler, lorawan_join_failed_handler
};
//OTAA keys !!!! KEYS ARE MSB !!!!
uint8_t nodeDeviceEUI[8] = {0xAC, 0x00, 0x09, 0xFF, 0x08, 0x05, 0x71, 0x0E};
uint8_t nodeAppEUI[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
uint8_t nodeAppKey[16] = {0x65, 0x10, 0x36, 0x7D, 0x7F, 0xF6, 0x07, 0xE8, 0x76, 0xB3, 0x07, 0xDC, 0xF6, 0x89, 0xFD, 0x37};
// ABP keys
uint32_t nodeDevAddr = 0x260116F8;
uint8_t nodeNwsKey[16] = {0x7E, 0xAC, 0xE2, 0x55, 0xB8, 0xA5, 0xE2, 0x69, 0x91, 0x51, 0x96, 0x06, 0x47, 0x56, 0x9D, 0x23};
uint8_t nodeAppsKey[16] = {0xFB, 0xAC, 0xB6, 0x47, 0xF3, 0x58, 0x45, 0xC7, 0x50, 0x7D, 0xBF, 0x16, 0x8B, 0xA8, 0xC1, 0x7C};
// Private defination
#define LORAWAN_APP_DATA_BUFF_SIZE 64 /**< buffer size of the data to be transmitted. */
#define LORAWAN_APP_INTERVAL 20000 /**< Defines for user timer, the application data transmission interval. 20s, value in [ms]. */
static uint8_t m_lora_app_data_buffer[LORAWAN_APP_DATA_BUFF_SIZE]; //< Lora user application data buffer.
static lmh_app_data_t m_lora_app_data = {m_lora_app_data_buffer, 0, 0, 0, 0}; //< Lora user application data structure.
TimerEvent_t appTimer;
static uint32_t timers_init(void);
static uint32_t count = 0;
static uint32_t count_fail = 0;
// Serial.println("Stage : A3");
void setup()
{
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, LOW);
Serial.println("void setup is running");
// Initialize LoRa chip.
lora_rak4630_init();
// Initialize Serial for debug output
time_t timeout = millis();
Serial.begin(115200);
while (!Serial)
{
if ((millis() - timeout) < 5000)
{
delay(100);
}
else
{
break;
}
}
Serial.println("=====================================");
Serial.println("Welcome to RAK4630 LoRaWan!!!");
if (doOTAA)
{
Serial.println("Type: OTAA");
}
else
{
Serial.println("Type: ABP");
}
switch (g_CurrentRegion)
{
case LORAMAC_REGION_AS923:
Serial.println("Region: AS923");
break;
case LORAMAC_REGION_AU915:
Serial.println("Region: AU915");
break;
case LORAMAC_REGION_CN470:
Serial.println("Region: CN470");
break;
case LORAMAC_REGION_EU433:
Serial.println("Region: EU433");
break;
case LORAMAC_REGION_IN865:
Serial.println("Region: IN865");
break;
case LORAMAC_REGION_EU868:
Serial.println("Region: EU868");
break;
case LORAMAC_REGION_KR920:
Serial.println("Region: KR920");
break;
case LORAMAC_REGION_US915:
Serial.println("Region: US915");
break;
}
Serial.println("=====================================");
//creat a user timer to send data to server period
uint32_t err_code;
err_code = timers_init();
if (err_code != 0)
{
Serial.printf("timers_init failed - %d\n", err_code);
return;
}
// Setup the EUIs and Keys
if (doOTAA)
{
lmh_setDevEui(nodeDeviceEUI);
lmh_setAppEui(nodeAppEUI);
lmh_setAppKey(nodeAppKey);
}
else
{
lmh_setNwkSKey(nodeNwsKey);
lmh_setAppSKey(nodeAppsKey);
lmh_setDevAddr(nodeDevAddr);
}
// Initialize LoRaWan
err_code = lmh_init(&g_lora_callbacks, g_lora_param_init, doOTAA, g_CurrentClass, g_CurrentRegion);
if (err_code != 0)
{
Serial.printf("lmh_init failed - %d\n", err_code);
return;
}
// Start Join procedure
lmh_join();
}
void loop()
{
/*Serial.println("Running the void loop");
float temp = sht31.getTemperature();
int temp1 = temp*100;
float hum = sht31.getHumidity();
int hum1 = hum*100;
Serial.print("Temp = ");
Serial.print(temp1);
Serial.println(" C"); //The unit for Celsius because original arduino don't support speical symbols
Serial.print("Hum = ");
Serial.print(hum1);
Serial.println("%");
Serial.println();
delay(500);
// Put your application tasks here, like reading of sensors,
// Controlling actuators and/or other functions. */
}
/**@brief LoRa function for handling HasJoined event.
*/
void lorawan_has_joined_handler(void)
{
Serial.println("OTAA Mode, Network Joined!");
lmh_error_status ret = lmh_class_request(g_CurrentClass);
if (ret == LMH_SUCCESS)
{
delay(1000);
TimerSetValue(&appTimer, LORAWAN_APP_INTERVAL);
TimerStart(&appTimer);
}
}
/**@brief LoRa function for handling OTAA join failed
*/
static void lorawan_join_failed_handler(void)
{
Serial.println("OTAA join failed!");
Serial.println("Check your EUI's and Keys's!");
Serial.println("Check if a Gateway is in range!");
}
/**@brief Function for handling LoRaWan received data from Gateway
*
* @param[in] app_data Pointer to rx data
*/
void lorawan_rx_handler(lmh_app_data_t *app_data)
{
Serial.printf("LoRa Packet received on port %d, size:%d, rssi:%d, snr:%d, data:%s\n",
app_data->port, app_data->buffsize, app_data->rssi, app_data->snr, app_data->buffer);
}
void lorawan_confirm_class_handler(DeviceClass_t Class)
{
Serial.printf("switch to class %c done\n", "ABC"[Class]);
// Informs the server that switch has occurred ASAP
m_lora_app_data.buffsize = 0;
m_lora_app_data.port = gAppPort;
lmh_send(&m_lora_app_data, g_CurrentConfirm);
}
//Serial.print("Stage : A4");
String data = "";
void send_lora_frame(void)
{
if (lmh_join_status_get() != LMH_SET)
{
//Not joined, try again later
return;
}
uint32_t i = 0;
memset(m_lora_app_data.buffer, 0, LORAWAN_APP_DATA_BUFF_SIZE);
m_lora_app_data.port = gAppPort;
float temp = sht31.getTemperature();
float hum = sht31.getHumidity();
data = "Tem:" + String(temp) + "C " + "Hum:" + String(hum) + "% ";
Serial.println(data);
uint16_t t = temp * 100;
uint16_t h = hum * 100;
m_lora_app_data.buffer[i++] = 0x44;
m_lora_app_data.buffer[i++] = (uint8_t)(t>>8);
m_lora_app_data.buffer[i++] = (uint8_t)t;
m_lora_app_data.buffer[i++] = (uint8_t)(h>>8);
m_lora_app_data.buffer[i++] = (uint8_t)h;
m_lora_app_data.buffsize = i;
lmh_error_status error = lmh_send(&m_lora_app_data, g_CurrentConfirm);
if (error == LMH_SUCCESS)
{
count++;
Serial.printf("lmh_send ok count %d\n", count);
}
else
{
count_fail++;
Serial.printf("lmh_send fail count %d\n", count_fail);
}
}
/**@brief Function for handling user timerout event.
*/
void tx_lora_periodic_handler(void)
{
TimerSetValue(&appTimer, LORAWAN_APP_INTERVAL);
TimerStart(&appTimer);
Serial.println("Sending frame now...");
send_lora_frame();
}
//Serial.println("Stage : A5");
/**@brief Function for the Timer initialization.
*
* @details Initializes the timer module. This creates and starts application timers.
*/
uint32_t timers_init(void)
{
TimerInit(&appTimer, tx_lora_periodic_handler);
return 0;
}
Code uploads just fine and it connects to the gateway but it can not send the data to the cloud. I am not sure why is this happening. Here is the screenshot of arduino serial monitor when the above code is running.
I can see the joining request and accepted message on the TTN. but unfortunately I can not see any data coming in.
Please let me know if my code is wrong or I am doing something wrong.
Thanks in advance.