Dear Employer,
I am a mechatronics engineer with sufficient knowledge in C programming language. I am also a graduate of the University of Texas in Austin Embedded Systems - Shape the World MOOC on Edx thus will help you pretty well specially in embedded c and RTOS. I also worked on various projects with Arduino Uno, Mega and Nano along with NodeMCU (for IoT projects), Raspberry Pi, and TI Tiva C.
Regarding your project, I see that you want to repurpose one of the two remotes provided to do a certain function using an Arduino. Moreover, repurposing the remote means either using the circuitry provided or building a new one which I will also help you with. However, I would like to know how the remote is connected to the pump. Is it by Bluetooth, WIFI, or radio frequency? I look forward to hear from you soon and wish you the best of luck.
Best regards,
Ahmed Nasr