Bluetooth Technology was built as a cable replacement system, so its use in embedded systems is inevitable. Most of the famous microcontrollers such as ESP32, Raspberry Pi, Arduino Mega have built in Bluetooth
I am using the SerialToSerialBT example. I am able to scan and discover the Bluetooth device from my smartphone. But the pairing is without any security/passcode. It simply pairs immediately. How to make the pairing using PIN/Passkey entry? Sketch: #include"BluetoothSerial.h"#if!defined(CON...
According to my undrestanding from my studying about bluetooth BLE, here ESP32 acts as server and cellphone is the client. My question is that to reach this goal which one of the available examles in esp_idf is more suitable to use? Since I see both examples named "ble_spp_server" ...
I am using Bluedroid BLE stack in order to do BLE with an Esp32S3 chip and everything is ok. The stack runs normally, I have no problems with it. Now, I would like to enable Wifi in SoftAP mode when the chip starts in order to have the possibility to upgrade the firmware via OTA...
How to use the LCD1602 connected with the ESP32 via the I2C. We will see how to use the function to write the data to the I2C slave...
Re: how to use esp_ble_gatts_close ? Quote Postbykongon»Sat Dec 19, 2020 11:01 am Hi, You can find those values at gatts_profile_event_handler. case ESP_GATTS_CONNECT_EVT: spp_conn_id = p_data->connect.conn_id; spp_gatts_if = gatts_if; ...
I have a device that has HC-42 Bluetooth 5.0BLE module and I want to connect it via esp32-wroom-32. I found the UUID of the device but there is no characteristic UUID. I've used BLE_client example to connect my HC-42 module but it did not work. ...
First, connect your board with a computer through a USB cable. After connecting the board with a computer, you select the board, you are using. There are many types of ESP32 boards available on market. But we are using the Dev kit in this tutorial. But you can use any board you want...
The analogSetVRefPin() function sets the pin to use for ADC calibration or to set a reference voltage for ADC if the esp is not already calibrated (25, 26, or 27). You can use reference voltage on 25, 26, and 27 pins. If you are just getting started with ESP32 programming, check...
向ESP32 HTTP服务器添加CORS-Header,即跨域资源共享头,可以通过以下步骤实现: CORS(Cross-Origin Resource Sharing)是一种机制,允许服务器在响应中添加特定的HTTP头,从而允许跨域访问。在添加CORS头之前,客户端(浏览器)可能会因为跨域限制而阻止访问。 在ESP32上实现向HTTP响应添加CORS头的关键步骤如下: 在ESP32...