I am an expert on ESP32 and STM32 firmware development and hardware design

I can design PCB and develop the firmware as per your requirements. I have the following expertise:

1. Write custom requirement firmware development
2. Add secure DFU firmware update development
3. Write driver development for all the external sensors and peripherals
4. Write the library for UART, I2C, I2S, SPI communication protocols
5. Write BLE custom services to make data communication between BLE device and mobile application or device to device communication
6. STM32 and SEMTECH LoRa communication with LoraWAN gateway

Worked on the following STM32 MCUs:

1. High-performance MCU: STM32H7, STM32F7, STM32F4, STM32F2
2.MainStream MCU: STM32F0, STM32F1, STM32F3
3. Ultra Low power MCU: STM32L0. STM32L1, STM32L3, STM32L4, STM32L5
4. Wireless MCU: STM32WB, STM32WL

Programming IDE/framework:

1. For ESP32: ESP-IDF, AWS freeRTOS and Arduino
2. For STM32: STM32CubeIDE