Added I2C Sensor examples

Xinyuan-LilyGO · Jun 24, 2024 · 41cddd1 · 41cddd1
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diff --git a/README.MD b/README.MD
@@ -78,6 +78,7 @@ examples/
 ├── WireExample                 # Wire initialization example
 ├── USB_Camera                  # USB camera example (Only ESP32S3)
 ├── I2C_HP303BSensor            # External I2C Temperature and Humidity Sensor Example
+├── I2C_BME280Sensor            # External I2C Temperature and Humidity Sensor Example
 ├── TinyGPS_Example             # GPS Module example 
 └── PCIE_Modem_ATDebug          # PCIE Modem example
 ```

diff --git a/examples/I2C_BME280Sensor/.skip.T-INTERNET-COM b/examples/I2C_BME280Sensor/.skip.T-INTERNET-COM
diff --git a/examples/I2C_BME280Sensor/I2C_BME280Sensor.ino b/examples/I2C_BME280Sensor/I2C_BME280Sensor.ino
@@ -0,0 +1,197 @@
+/**
+ * @file      I2C_BME280Sensor.ino
+ * @author    Lewis He (lewishe@outlook.com)
+ * @license   MIT
+ * @copyright Copyright (c) 2024  ShenZhen XinYuan Electronic Technology Co., Ltd
+ * @date      2024-06-24
+ * @note      The BME280 sensor is currently only available in T-ETH-ELite-LoRa-Shield. 
+ *            Other models do not have it and require external wiring to the sensor module.
+ */
+
+#include <Wire.h>
+#include <SPI.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_BME280.h>
+#include <U8g2lib.h>
+
+// Select the board model to be used and adjust the Pin according to the actual situation
+
+// #define LILYGO_T_INTERNET_POE        //There is no BME280 sensor by default, and an external wire is required to connect to the module
+// #define LILYGO_T_ETH_POE_PRO         //There is no BME280 sensor by default, and an external wire is required to connect to the module
+// #define LILYGO_T_INTER_COM           //Can't run
+// #define LILYGO_T_ETH_LITE_ESP32      //There is no BME280 sensor by default, and an external wire is required to connect to the module
+// #define LILYGO_T_ETH_LITE_ESP32S3    //There is no BME280 sensor by default, and an external wire is required to connect to the module
+// #define LILYGO_T_ETH_ELITE_ESP32S3   //Default [T-ETH-ELite-LoRa-Shield onboard BME280 sensor] ,The main board alone has no sensor 
+
+
+#if   defined(LILYGO_T_INTERNET_POE)
+// IO34 35,39,34,36 can only be used for input and cannot be set as output
+#define I2C_SDA     14
+#define I2C_SCL     15
+#elif defined(LILYGO_T_ETH_POE_PRO)
+// IO34 35,39,34,36 can only be used for input and cannot be set as output
+#define I2C_SDA     13
+#define I2C_SCL     14
+#elif defined(LILYGO_T_INTER_COM)
+//No free pin
+#error "No  free pin"
+#elif defined(LILYGO_T_ETH_LITE_ESP32)
+// IO35,36,37,38,39 can only be used for input and cannot be set as output
+#define I2C_SDA     13
+#define I2C_SCL     14
+#elif defined(LILYGO_T_ETH_LITE_ESP32S3)
+// ESP32S3 can freely map unused Pins
+#define I2C_SDA     1
+#define I2C_SCL     2
+#elif defined(LILYGO_T_ETH_ELITE_ESP32S3)
+// ESP32S3 can freely map unused Pins , If you use an expansion board, you can only use SDA 17,SCL 18
+#define I2C_SDA     17
+#define I2C_SCL     18
+#endif
+
+// OLED model 
+#define DISPLAY_MODEL               U8G2_SSD1306_128X64_NONAME_F_HW_I2C
+// OLED device address
+#define DISPLAY_ADDR                0x3C
+
+DISPLAY_MODEL *u8g2 = NULL;
+
+#define SEALEVELPRESSURE_HPA (1013.25)
+
+Adafruit_BME280 bme; // I2C
+
+unsigned long delayTime;
+
+
+uint32_t deviceScan(TwoWire *_port, Stream *stream)
+{
+    stream->println("Devices Scan start.");
+    uint8_t err, addr;
+    int nDevices = 0;
+    for (addr = 1; addr < 127; addr++) {
+        _port->beginTransmission(addr);
+        err = _port->endTransmission();
+        if (err == 0) {
+            stream->print("I2C device found at address 0x");
+            if (addr < 16)
+                stream->print("0");
+            stream->print(addr, HEX);
+            stream->println(" !");
+            nDevices++;
+        } else if (err == 4) {
+            stream->print("Unknow error at address 0x");
+            if (addr < 16)
+                stream->print("0");
+            stream->println(addr, HEX);
+        }
+    }
+    if (nDevices == 0)
+        stream->println("No I2C devices found\n");
+    else
+        stream->println("Done\n");
+    return nDevices;
+}
+
+
+void setup()
+{
+    Serial.begin(115200);
+    while (!Serial);   // time to get serial running
+    Serial.println(F("BME280 test"));
+
+    Wire.begin(I2C_SDA_PIN, I2C_SCL_PIN);
+
+    deviceScan(&Wire, &Serial);
+
+
+    // default settings
+    bool status = bme.begin();
+    // You can also pass in a Wire library object like &Wire2
+    // status = bme.begin(0x76, &Wire2)
+    if (!status) {
+        Serial.println("Could not find a valid BME280 sensor, check wiring, address, sensor ID!");
+        Serial.print("SensorID was: 0x"); Serial.println(bme.sensorID(), 16);
+        Serial.print("        ID of 0xFF probably means a bad address, a BMP 180 or BMP 085\n");
+        Serial.print("   ID of 0x56-0x58 represents a BMP 280,\n");
+        Serial.print("        ID of 0x60 represents a BME 280.\n");
+        Serial.print("        ID of 0x61 represents a BME 680.\n");
+        if (u8g2) {
+            u8g2->setFont(u8g2_font_ncenB08_tr);
+            u8g2->clearBuffer();
+            u8g2->setCursor(0, 16);
+            u8g2->print("BME280 Could not find");
+            u8g2->sendBuffer();
+        }
+        while (1) delay(10);
+    }
+
+    Wire.beginTransmission(DISPLAY_ADDR);
+    if (Wire.endTransmission() == 0) {
+        Serial.printf("Find Display model at 0x%X address\n", DISPLAY_ADDR);
+        u8g2 = new DISPLAY_MODEL(U8G2_R0, U8X8_PIN_NONE);
+        u8g2->begin();
+    }
+
+    Serial.println("-- Default Test --");
+    delayTime = 1000;
+
+    Serial.println();
+}
+
+
+void loop()
+{
+    printValues();
+    delay(delayTime);
+}
+
+
+void printValues()
+{
+    Serial.print("Temperature = ");
+    Serial.print(bme.readTemperature());
+    Serial.println(" °C");
+
+    Serial.print("Pressure = ");
+
+    Serial.print(bme.readPressure() / 100.0F);
+    Serial.println(" hPa");
+
+    Serial.print("Approx. Altitude = ");
+    Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
+    Serial.println(" m");
+
+    Serial.print("Humidity = ");
+    Serial.print(bme.readHumidity());
+    Serial.println(" %");
+
+    Serial.println();
+
+    if (u8g2) {
+        u8g2->setFont(u8g2_font_ncenB08_tr);
+        u8g2->clearBuffer();
+
+        u8g2->setCursor(0, 16);
+
+        u8g2->print("Temperature:");
+        u8g2->print(bme.readTemperature());
+        u8g2->print(" *C");
+
+        u8g2->setCursor(0, 32);
+        u8g2->print("Pressure:");
+        u8g2->println(bme.readPressure() / 100.0F);
+        u8g2->print(" hPa");
+
+        u8g2->setCursor(0, 48);
+        u8g2->print("Altitude:");
+        u8g2->println(bme.readAltitude(SEALEVELPRESSURE_HPA));
+        u8g2->print(" m");
+
+        u8g2->setCursor(0, 64);
+        u8g2->print("Humidity:");
+        u8g2->println(bme.readHumidity());
+        u8g2->print(" %");
+
+        u8g2->sendBuffer();
+    }
+}
diff --git a/examples/I2C_HP303BSensor/.skip.T-INTERNET-COM b/examples/I2C_HP303BSensor/.skip.T-INTERNET-COM
diff --git a/examples/I2C_HP303BSensor/I2C_HP303BSensor.ino b/examples/I2C_HP303BSensor/I2C_HP303BSensor.ino
@@ -9,6 +9,15 @@
  */
 #include "src/LOLIN_HP303B.h"       ///~https://github.com/wemos/LOLIN_HP303B_Library
 
+// Select the board model to be used and adjust the Pin according to the actual situation
+
+// #define LILYGO_T_INTERNET_POE
+// #define LILYGO_T_ETH_POE_PRO
+// #define LILYGO_T_INTER_COM           //Can't run
+// #define LILYGO_T_ETH_LITE_ESP32
+// #define LILYGO_T_ETH_LITE_ESP32S3
+// #define LILYGO_T_ETH_ELITE_ESP32S3
+
 #if   defined(LILYGO_T_INTERNET_POE)
 // IO34 35,39,34,36 can only be used for input and cannot be set as output
 #define I2C_SDA     14