#define I2C_ADDR_ERROR_STR "i2c null address error" #define I2C_DRIVER_NOT_INSTALL_ERR_STR "i2c driver not installed" #define I2C_SLAVE_BUFFER_LEN_ERR_STR "i2c buffer size too small for slave mode" #define I2C_
E (3728) i2c: i2c_master_write(1168): i2c null address error E (4728) i2c: i2c_set_pin(860): scl and sda gpio numbers are the same E (4728) i2c: i2c_master_write(1168): i2c null address error E (5728) i2c: i2c_set_pin(860): scl and sda gpio numbers are the same Setting...
由于ESP32-C3只有一条硬件I2C总线,然而我的程序中需要同时要两条I2C总线,所以不得不考虑同时使用硬件I2C和软件I2C。硬件I2C作为Slave用于与上位机通信,效率比较高,代码也简单,本篇不做详细介绍。本篇重点介绍软件I2C方式驱动VL53L0X,其他I2C设备可参考。 前面有篇文章写到了I2C总线驱动VL53L0X,这篇我们再深入点。
问ESP32:古鲁冥想错误: GY521 I2C项目中的核心1恐慌(StoreProhibited)ENI2C (Inter-Integrated Circuit) 总线用于使 ESP32 和多个外部设备进行通信。多个外部设备可以共用一个 I 2C 总 线。工作
在i2c_sensor_mpu6050_init函数中初始化I2C接口与mpu6050传感器 static void i2c_sensor_mpu6050_init(void) { esp_err_t ret; i2c_bus_init(); mpu6050 = mpu6050_create(I2C_MASTER_NUM, MPU6050_I2C_ADDRESS); TEST_ASSERT_NOT_NULL_MESSAGE(mpu6050, "MPU6050 create returned NULL"); ret = mpu6050_confi...
i2c_cmd_link_create(); ESP_ERROR_CHECK(i2c_master_start(cmd)); ESP_ERROR_CHECK(i2c_master_write_byte(cmd, (I2C_ADDRESS << 1) | I2C_MASTER_READ, 1)); ESP_ERROR_CHECK(i2c_master_read_byte(cmd, data, 0)); ESP_ERROR_CHECK(i2c_master_read_byte(cmd, data+1, 0)); ESP_ERROR_...
if (mfrc522.PCD_Authenticate(0x60, blockAddress, &key, &(mfrc522.uid)) != 0) { Serial.println(“Authentication failed.”); return; } 代码尝试使用默认密钥(在本例中为块2)对卡片上的特定块进行认证。0x60是一个指定使用KEY_A进行认证的命令。KEY_A是RFID卡上可用的两个密钥(KEY_A和KEY_B)...
问如何使用ESP32cam在bme680传感器的mqtt上发布数据EN之前介绍了RabbitMQ以及如何在SpringBoot项目中整合使用RabbitMQ，看过的朋友都说写的比较详细，希望再总结一下目前比较流行的MQTT。所以接下来，就来介绍什么MQTT？它在IoT中有着怎样的作用？如何在项目中使用MQTT？
MFRC522DriverSPI driver{ss_pin};// Create SPI driver//MFRC522DriverI2C driver{}; // Create I2C driverMFRC522 mfrc522{driver};// Create MFRC522 instanceMFRC522::MIFARE_Key key; byte blockAddress =2; byte newBlockData[17] = {"www.yourcee.com"};//byte newBlockData[16] = {0,0...
I'm using the ESP32-S3 TFT Feather and the 9-DOF Orientation IMU Fusion Breakout (BNO085) with CircuitPython and a STEMMA QT cable. When connecting the devices, the default I2C address (0x4A) is not consistently recognized. An I2C scan often shows 0x09, no detection, or rarely 0x4A. ...