Your Microcontroller Programming Project requirements can be

1. Arduino/ PLC / STM Projects
2. Arduino/PLC/STM Programming/Coding (sensors or module interfacing, algorithm development, code debugging & code optimization)
3. Sensors Interfacing (Temperature, humidity, accelerometer, ultrasonic, and many others)
4. ESP32 (Fast processing, BLE, WIFI)
5. ESP8266 (WIFI)
6. Circuit design (Fritzing, Altium Schematics, and PCB)
7. Wireless Communication (RF, Bluetooth, WIFI, Zigbee, and others)

Sensors can be 

• Temperature
• Humidity
• Accelerometer
• Microphone
• Infrared
• Photoresistor
• Water
• Voltage detection
• Photodiode
• Camera
• Lidar
• Position

I have the following expertise

• Firmware development
• Debugging
• Microcontrollers
• IoT
• ROS
• Testing
• Image processing
• AI