Hi, I read about your project and I’m very interest to participate in this project. I’m enjoy in the development of C++ projects, for Arduino Uno, ESP8266 and ESP32 programming with Arduino IDE.
On my profile (https://www.freelancer.com/u/nico2747?w=f) you can see the following projects based on arduino and ESP. The project consisted in control the speed and turning sense of a Stepper Motor using an Ultrasonic Sensor (HC-SR04), a big sound sensor (VMA309) and a H-bridge Module (L298N). The HC-SR04 is used to determinate the period of the pulses sent from the Arduino to the H-bridge module to move the motor, according with the distance measured for then sensor, so the smaller the distance the faster the speed of the motor, and the big sound sensor is used to change the turning sense of the motor when the sensor detects a snap, without affecting the speed.
Also, I made a project based in the implementation of an Arduino Uno and an ESP8266 where the Arduino reads the data of a temperature sensor (dht22) and send it by UART to the ESP and then the ESP upload the information to an MQTT broker using Mosquitto, into specifics topics, posting the information in JSON format.
I hope with this proposal have fulfilled your expectations for this project, I and hope we can talk about this project. Thanks, and Regards!