[LORA] Improvements, change frequency, webUI, Oled support, add boards (#1742)
* [LORA] Capability to change LORA frequency and Add OLED Merge of the 2 environments for TTGO V1 * Merge messages keys with upper level json * Id as a sub topic * Add display and state measures * Add frequency configuration through WebUI * Add parameters * Add auto discovery * Add node example for ttgo lora32 v1 * Add environments and fix scope * Support for sync word as a byte * Fix TX Power setting * Add LoRa gateway description * Add onlyknown filter
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.pio
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.vscode/.browse.c_cpp.db*
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.vscode/c_cpp_properties.json
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.vscode/launch.json
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.vscode/ipch
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# OpenMQTTGateway LoRa Node Example
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This repository contains an example of a LoRa node program designed for the ESP32 platform. The program reads the internal temperature of the ESP32, packages the data into a JSON format, and sends it over LoRa.
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## Features:
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* Uses an SX12XX LoRa module.
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* Displays packet sending status and temperature data on an SSD1306 OLED display.
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* Sends the ESP32's MAC address as the node ID.
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* Sends temperature data in Celsius.
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## Hardware Requirements:
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* ESP32 development board.
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* SX12XX LoRa module.
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* SSD1306 OLED display.
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## Pin Configuration:
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* SCK - GPIO5
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* MISO - GPIO19
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* MOSI - GPIO27
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* SS - GPIO18
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* RST - GPIO14
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* DI0 - GPIO26
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## Setup:
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### Hardware Setup:
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Connect the SX1278 LoRa module and the SSD1306 OLED display to the ESP32 according to the pin configuration.
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Ensure that the OLED display is powered correctly.
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### Software Setup:
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* Clone this repository.
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* Open the provided node program with PlatformIO
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* Upload the program to your ESP32.
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## Usage:
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Power on the ESP32.
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The OLED display will show the status of the packet being sent and the current temperature reading.
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The built-in LED on the ESP32 will blink once every time a packet is sent.
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Monitor the serial output (at 115200 baud rate) to see the JSON formatted data being sent.
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## Data Format:
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The data is sent in the following JSON format:
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```json
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{
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"model": "ESP32TEMP",
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"id": "ESP32_MAC_ADDRESS",
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"tempc": "TEMPERATURE_IN_CELSIUS"
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}
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```
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## Troubleshooting:
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LoRa Initialization Failed: Ensure that the SX1278 LoRa module is connected correctly and powered on.
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OLED Display Not Working: Check the connections and ensure that the display is powered correctly.
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No Temperature Data: Ensure that the ESP32's internal temperature sensor is functional.
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Contributing:
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Feel free to contribute to this example by opening issues or submitting pull requests. Any feedback or improvements are welcome!
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I hope this README helps users understand and use your program! Adjustments can be made as necessary to fit any additional details or changes.
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; PlatformIO Project Configuration File
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;
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; Build options: build flags, source filter
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; Upload options: custom upload port, speed and extra flags
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; Library options: dependencies, extra library storages
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; Advanced options: extra scripting
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;
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; Please visit documentation for the other options and examples
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; https://docs.platformio.org/page/projectconf.html
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[env:ttgo-lora32-v1]
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platform = espressif32
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board = ttgo-lora32-v1
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framework = arduino
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lib_deps =
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https://github.com/sandeepmistry/arduino-LoRa.git#f4a1d27
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https://github.com/ThingPulse/esp8266-oled-ssd1306.git#f96fd6a
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monitor_speed = 115200
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[env:ttgo-lora32-v21]
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platform = espressif32
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board = ttgo-lora32-v21
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framework = arduino
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lib_deps =
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https://github.com/sandeepmistry/arduino-LoRa.git#f4a1d27
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https://github.com/ThingPulse/esp8266-oled-ssd1306.git#f96fd6a
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monitor_speed = 115200
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[env:heltec-wifi-lora-32] ; Heltec ESP32 Board with SSD1306 display
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platform = ${com.esp32_platform}
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board = heltec_wifi_lora_32
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framework = arduino
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lib_deps =
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https://github.com/sandeepmistry/arduino-LoRa.git#f4a1d27
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https://github.com/ThingPulse/esp8266-oled-ssd1306.git#f96fd6a
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monitor_speed = 115200
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#include <LoRa.h>
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#include <SPI.h>
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#include <WiFi.h>
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#include <Wire.h>
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#include <stdio.h>
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#include "SSD1306.h"
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#include "rom/ets_sys.h"
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#include "soc/rtc_cntl_reg.h"
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#include "soc/sens_reg.h"
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#define SCK 5 // GPIO5 -- SX1278's SCK
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#define MISO 19 // GPIO19 -- SX1278's MISnO
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#define MOSI 27 // GPIO27 -- SX1278's MOSI
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#define SS 18 // GPIO18 -- SX1278's CS
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#define RST 14 // GPIO14 -- SX1278's RESET
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#define DI0 26 // GPIO26 -- SX1278's IRQ(Interrupt Request)
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#define BAND 915E6
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unsigned int counter = 0;
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SSD1306 display(0x3c, 4, 15);
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String rssi = "RSSI --";
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String packSize = "--";
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String packet;
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float intTemperatureRead() {
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SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 3,
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SENS_FORCE_XPD_SAR_S);
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SET_PERI_REG_BITS(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_CLK_DIV, 10,
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SENS_TSENS_CLK_DIV_S);
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CLEAR_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_POWER_UP);
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CLEAR_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_DUMP_OUT);
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SET_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_POWER_UP_FORCE);
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SET_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_POWER_UP);
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ets_delay_us(100);
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SET_PERI_REG_MASK(SENS_SAR_TSENS_CTRL_REG, SENS_TSENS_DUMP_OUT);
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ets_delay_us(5);
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float temp_f = (float)GET_PERI_REG_BITS2(SENS_SAR_SLAVE_ADDR3_REG,
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SENS_TSENS_OUT, SENS_TSENS_OUT_S);
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float temp_c = (temp_f - 32) / 1.8;
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return temp_c;
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}
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void setup() {
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pinMode(16, OUTPUT);
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pinMode(2, OUTPUT);
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digitalWrite(16, LOW); // set GPIO16 low to reset OLED
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delay(50);
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digitalWrite(16, HIGH); // while OLED is running, must set GPIO16 in high
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Serial.begin(115200);
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while (!Serial)
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;
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Serial.println();
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Serial.println("LoRa Sender Test");
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SPI.begin(SCK, MISO, MOSI, SS);
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LoRa.setPins(SS, RST, DI0);
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if (!LoRa.begin(BAND)) {
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Serial.println("Starting LoRa failed!");
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while (1)
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;
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}
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Serial.println("init ok");
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display.init();
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display.flipScreenVertically();
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display.setFont(ArialMT_Plain_10);
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delay(1500);
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}
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void loop() {
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display.clear();
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display.setTextAlignment(TEXT_ALIGN_LEFT);
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display.setFont(ArialMT_Plain_10);
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display.drawString(0, 0, "Sending packet: ");
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display.drawString(90, 0, String(counter));
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String NodeId = WiFi.macAddress();
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float temp = intTemperatureRead();
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// send packet
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LoRa.beginPacket();
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// Build json string to send
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String msg = "{\"model\":\"ESP32TEMP\",\"id\":\"" + NodeId + "\",\"tempc\":" + String(temp) + "}";
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// Send json string
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LoRa.print(msg);
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LoRa.endPacket();
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Serial.println(String(msg));
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display.drawString(0, 15, String(NodeId));
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display.drawString(0, 30, "tempc: " + String(temp) + " C");
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display.display();
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counter++;
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digitalWrite(2, HIGH); // turn the LED on (HIGH is the voltage level)
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delay(1000); // wait for a second
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digitalWrite(2, LOW); // turn the LED off by making the voltage LOW
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delay(60000); // wait for 60 seconds
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}
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