Arduino demo source code for LoRa "Receiver"

[admin]

Code:

#include <LoRa.h>
#include <SPI.h>


#include <Wire.h>
#include <Bonezegei_SSD1306.h>
Bonezegei_SSD1306 oled(128, 64);

#define ss 41
#define rst 2
#define dio0 40

#include "Arduino.h"


#define ANALOG_A1   4
#define ANALOG_A2   6
#define ANALOG_A3   5
#define ANALOG_A4   7

const int Relay1 = 48;

const int K1 = 47;
const int K2 = 21;
const int K3 = 14;
const int K4 = 13;
const int K5 = 12;
const int K6 = 11;
const int K7 = 10;
const int K8 = 9;

const int IO0 = 0;  //GPIO0
const int DI1 = 16;  //DI
const int DI2 = 15;  //1-wire


void setup()
{

 
  SPI.begin(42, 43, 44, 41);  //SPI.begin(PIN_SPI_SCK, PIN_SPI_MISO, PIN_SPI_MOSI, -1);   last one is SS not used, use -1
  Wire.begin(39, 38);

  oled.begin();
  oled.clear();
//  oled.drawText(1, 0, "Arial8", oled.Font_Arial8);
  oled.drawText(1, 0, "KinCony", oled.Font_Arial14);
//  oled.drawText(1, 24, "Arial12", oled.Font_Arial12);
//  oled.drawText(1, 40, "Arial14", oled.Font_Arial14);
  oled.draw();  //update the screen
 
  Serial.begin(115200);
  Serial.println("begin");
  LoRa.setPins(ss, rst, dio0);    //setup LoRa transceiver module
 
  while (!LoRa.begin(433E6))     //433E6 - Asia, 866E6 - Europe, 915E6 - North America
  {
    Serial.println(".");
    delay(500);
  }
  LoRa.setSyncWord(0xA5);
  Serial.println("LoRa Initializing OK!");
 
  pinMode(Relay1,OUTPUT);
 
  pinMode(K1,INPUT);
  pinMode(K2,INPUT);
  pinMode(K3,INPUT);
  pinMode(K4,INPUT);
  pinMode(K5,INPUT);
  pinMode(K6,INPUT);
  pinMode(K7,INPUT);
  pinMode(K8,INPUT);
 
  pinMode(DI1,INPUT);
  pinMode(DI2,INPUT);
  pinMode(IO0,INPUT);

  pinMode(ANALOG_A1,INPUT);
  pinMode(ANALOG_A2,INPUT);
  pinMode(ANALOG_A3,INPUT);
  pinMode(ANALOG_A4,INPUT);
  digitalWrite(Relay1, HIGH);
 


}

void loop()
{
uint8_t valk1 = digitalRead(K1);
uint8_t valk2 = digitalRead(K2);
uint8_t valk3 = digitalRead(K3);
uint8_t valk4 = digitalRead(K4);
uint8_t valk5 = digitalRead(K5);
uint8_t valk6 = digitalRead(K6);
uint8_t valk7 = digitalRead(K7);
uint8_t valk8 = digitalRead(K8);

uint8_t valdi1 = digitalRead(DI1);
uint8_t valdi2 = digitalRead(DI2);
uint8_t valIO0 = digitalRead(IO0);

   
if (valdi1==LOW) digitalWrite(Relay1, HIGH); else digitalWrite(Relay1, LOW);
if (digitalRead(DI2)==LOW)Serial.println("input2 down");
if (digitalRead(IO0)==LOW)Serial.println("DL Button down");

if (digitalRead(K1)==LOW)Serial.println("K1 down");
if (digitalRead(K2)==LOW)Serial.println("K2 down");
if (digitalRead(K3)==LOW)Serial.println("K3 down");
if (digitalRead(K4)==LOW)Serial.println("K4 down");
if (digitalRead(K5)==LOW)Serial.println("K5 down");
if (digitalRead(K6)==LOW)Serial.println("K6 down");
if (digitalRead(K7)==LOW)Serial.println("K7 down");
if (digitalRead(K8)==LOW)Serial.println("K8 down");


//-------------------------------------
  if (analogRead(ANALOG_A1)>0) Serial.printf("Current Reading A1 on Pin(%d)=%d\n",ANALOG_A1,analogRead(ANALOG_A1));
  if (analogRead(ANALOG_A2)>0) Serial.printf("Current Reading A2 on Pin(%d)=%d\n",ANALOG_A2,analogRead(ANALOG_A2));
  if (analogRead(ANALOG_A3)>0) Serial.printf("Current Reading A3 on Pin(%d)=%d\n",ANALOG_A3,analogRead(ANALOG_A3));
  if (analogRead(ANALOG_A4)>0) Serial.printf("Current Reading A4 on Pin(%d)=%d\n",ANALOG_A4,analogRead(ANALOG_A4));

//---------------------------------------
  int packetSize = LoRa.parsePacket();    // try to parse packet
  if (packetSize)
  {
   
    Serial.print("Received packet '");

    while (LoRa.available())              // read packet
    {
      String LoRaData = LoRa.readString();
      Serial.print(LoRaData);

      oled.begin();
      oled.clear();
      oled.drawText(1, 0, LoRaData.c_str(), oled.Font_Arial14);
      String temp=String(LoRa.packetRssi());
      oled.drawText(1, 40, temp.c_str(), oled.Font_Arial14);
      oled.draw();  //update the screen
     
    }
    Serial.print("' with RSSI ");         // print RSSI of packet
    Serial.println(LoRa.packetRssi());
  }



}

before use this code, need to install LoRa SX1278 arduino library firstly.
   

[kendo]

   
i have done these instruction. it doesn't work.
Error Msg in Arduino:
--------------------------------------------------------------------------------------
LoRa_Receicer_KC868:7:10: fatal error: LoRa.h: No such file or directory
#include <LoRa.h>
          ^~~~~~~~
compilation terminated.
exit status 1
LoRa.h: No such file or directory
--------------------------------------------------------------------------------------------

the lib is installed!

[kendo]

I found the Solution:

I had to download the ZIP-File and then to use the Option: ADD Zip Library

downloaded from https://github.com/sandeepmistry/arduino-LoRa

[kendo]

I have found the solution:

I had to download the ZIP-File and then to use the Option: ADD Zip Library

download from: https://github.com/sandeepmistry/arduino-LoRa

[admin]

ok, good.

[maso]

I was too optimistic and full-bodied. Unfortunately, HA MQTT doesn't work the way I want it to. Somehow I didn't quite understand the HA topics, as some are not written to mqtt broker. Can you help me please to get my code right? I tried to re-code your topics which I see in the serial and in the mqtt broker via explorer:

Here is my code. and only the status is written, not the sensor parameters, which I do not understand
// Register new device and send discovery topics
void registerDevice(int address, const LoRaData& data) {
    if (registeredNodes[address]) return;

    Serial.printf("New device %08X to be registered in MQTT Broker:\n", address);

    char configTopic[180];
    char payload[1024];
    char stateTopic[50];
    char commandTopic[60];

    // State-& Command-Topics for switch & Sensors
   
    //sprintf(stateTopic,  "homeassistant/sensor/alrha%08X/params/state", address);
    //sprintf(commandTopic, "homeassistant/sensor/alrha%08X/params/set", address);
    sprintf(commandTopic, "homeassistant/sensor/alrhaDCDA0C7B7BD4/params/set", address);
    sprintf(stateTopic,  "homeassistant/sensor/alrhaDCDA0C7B7BD4/params/state", address);


    // Relay
    sprintf(configTopic, "homeassistant/switch/alr_ALR_switch/config");
    snprintf(payload, sizeof(payload),
      "{\"name\":\"relay\","
      "\"state_on\":1,"
      "\"state_off\":0,"
      "\"payload_on\":\"1\","
      "\"payload_off\":\"0\","
      "\"value_template\":\"{{ value_json.relay.on | string }}\","
      "\"state_topic\":\"%s\","
      "\"command_topic\":\"%s\","
      "\"unique_id\":\"alr_switch\","
      "\"device\":{"
        "\"identifiers\":[\"alr\"],"
        "\"name\":\"alr evb\","
        "\"model\":\"ALR\","
        "\"manufacturer\":\"KinCony\""
      "}}",
      stateTopic,
      commandTopic);

    Serial.printf("Config topic: %s\nPayload: %s\n", configTopic, payload);
    mqttClient.publish(configTopic, payload);
    Serial.println("MQTT Switch topic configured");
   
   
    // Sensors
    const char* sensorNames[] = {"inword", "outword", "analog_A1", "analog_A2", "analog_A3", "analog_A4", "DS18B20"};
    const char* valueTemplates[] = {"{{ value_json.inword }}", "{{ value_json.outword }}", "{{ value_json.analog_f[0] }}",
                                    "{{ value_json.analog_f[1] }}", "{{ value_json.analog_f[2] }}", "{{ value_json.analog_f[3] }}",
                                    "{{ value_json.wire1_data0 }}"};

    for (int i = 0; i < 7; i++) {
        delay(800);
        //sprintf(configTopic,  "homeassistant/sensor/alrha%08X/alr_ALR_param%d/config", address, i);
        sprintf(configTopic,  "homeassistant/sensor/alr_ALR_param%d/config", i);

        snprintf(payload, sizeof(payload),
        "{\"name\":\"%s\","
        "\"unit_of_measurement\":\"%s\","
        "\"value_template\":\"%s\","
        "\"state_topic\":\"%s\","
        "\"command_topic\":\"%s\","
        "\"unique_id\":\"alr_param%d\","
        "\"device\":{"
            "\"identifiers\":[\"alr\"],"
            "\"name\":\"alr evb\","
            "\"model\":\"ALR\","
            "\"manufacturer\":\"KinCony\""
            "}}",
        sensorNames[i],                          // Name des Sensors
        (i > 1 && i < 6) ? "V" : " ",            // Einheit (z. B. Volt) für 4 ADs
        valueTemplates[i],                      // Template für den Wert
        stateTopic,                              // State Topic
        commandTopic,                            // Command Topic
        i);                                      // Eindeutige ID
       
        Serial.printf("Config topic: %s\nPayload: %s\n", configTopic, payload);
        mqttClient.publish(configTopic, payload);
   
    }

    registeredNodes[address] = true;
    Serial.printf("All Device %08X Sonsor Topics registered.\n", address);
}




// update MQTT-State values
void updateMQTTState(int address, const LoRaData& data) {
    StaticJsonDocument<256> jsonDoc;
    jsonDoc["self_addr"] = data.self_addr;
    jsonDoc["inword"] = data.inword;
    jsonDoc["outword"] = data.outword;
    JsonArray analogF = jsonDoc.createNestedArray("analog_f");
    for (int i = 0; i < 4; i++) analogF.add(data.analog_f[i]);
    jsonDoc["wire1_data0"] = data.wire1_data0;
    jsonDoc["relay"]["on"] = data.relay_on;

    char buffer[512];
    serializeJson(jsonDoc, buffer, sizeof(buffer));

    char stateTopic[50];
    //sprintf(stateTopic, "homeassistant/sensor/alrha%08X/params/state", address);
    sprintf(stateTopic, "homeassistant/sensor/alrhaDCDA0C7B7BD4/params/state");
   
    // MQTT-Payload serial ausgeben
    Serial.print("MQTT State Updated:");
    Serial.println(buffer);
    Serial.println(); // Fügt einen CR ein


    // MQTT-Payload senden
    mqttClient.publish(stateTopic, buffer);
}

[maso]

I found the problem. the config len of the mqtt buffer is very high.
This Line helped!
mqttClient.setBufferSize(512); increase from 256 to 512

[admin]

ok, good.