Welcome to ESP32 WiFi Camera Lite repository
1. STM32 drives the servo gimbal
STM32 remote control servo gimbal
Note: esp32 camera needs to be burned with factory firmware. If you have not flashed the firmware after receiving the esp32 camera, it does not need to be burned. The factory default firmware
1. Experimental preparation
ESP32 camera
stm32 development board
2-DOF gimbal
Dupont line
2. Wiring diagram
Note:
Due to insufficient voltage, the ESP32 camera and STM32 development board require additional power via a Type-C data cable.
If the servo control is not sensitive enough, the servo will need an additional power supply. The Dupont cable only needs to connect the common ground and signal lines. This is because the motherboard can only be powered by a maximum of 5V, while the servo can only accept a maximum of 7.4V.
| STM32F103 | esp32 camera |
|---|---|
| PA2 | RX |
| PA3 | TX |
| GND | GND |
| NC | 5V |
| STM32F103 | s1 servo |
|---|---|
| PB13 | Signal line |
| 3.3V | vcc |
| GND | GND |
| STM32F103 | s2 servo |
|---|---|
| PA11 | signal line |
| 3.3V | VCC |
| GND | GND |
Actual wiring diagram:
3. Experimental steps and experimental results
Quick method: You can directly connect to the wifi opened by esp32. This experiment is named ESP32_WIFI_TEST. Then the IP address camera information of the mobile app is 192.169.4.1. You can use the app to control the servo
Check whether the program runs normally.
You can modify the WiFi name and password you want to connect to, as well as the name of the hotspot in the esp32_wifi.cpp file
Download the program of this project to the STM32 board.
Open the serial port assistant on the computer, open the computer to detect the serial port of STM32, as shown below
After pressing the reset button of STM32, wait for about 10 seconds, and the serial port assistant will print out the corresponding information
If the AP+STA mode is turned on, the IP address of AP+STA will have the correct IP address (this source code is this mode)
If only one mode is turned on, then sta_ip:null or ap_ip:null If sta_ip:null appears, you need to check whether the connected wifi name and password are correct. If they are correct, check whether only one AP mode is turned on, and not the STA mode
Use the app to control the movement of the car. After installing the "ESP32Cam" app, open it.
On the login page, set it according to the IP obtained by the serial port assistant. If the IP obtained by the serial port assistant is "192.168.2.110", then the configuration is as follows
Then click login directly
(Optional) If you want to connect to the hotspot of the wifi camera, the IP address must be set to 192.168.4.1, as shown in the figure
When the IP address is configured correctly and successfully connected, you can control the servo gimbal through the page of the app console
Horizontal screen
Note: Every time you restart the app, you need to click the exit button in the upper right corner, then exit and reconfigure the IP address information before logging in