USB datalogger

I need the development of the code for a microcontroller with USB host capability, which fulfills the following: • Data extraction by USB pendrive in CVS or text format. It must be indicated when it has been enumerated, at the end of copying the data or in case of not being able to enumerate. • Enable GPIO input from integrated USB port power management (overload). Regarding the action to take in case of overload, I am still not clear. In computers, the USB extraction sound is usually emitted. • I2C real time clock (Initially DS3231 but I am studying from another manufacturer, same for I2C or other method to keep time). • External flash memory (NOT SD, soldered in board, open to memory recommendations). • ADC converter 15 bits effective by IC2 (ADS1115) . • 16x2 LCD screen or better (open to recommendations). • 3 push buttons (set, up, dwn) or rotary encoder for setting variables. The variables are used in the water level calculation. (range of the probe, length of the probe installation, etc. This is developed). • Pointer storage in internal or external memory (FRAM) with CRC. If the CRC fails, it means that the pointer is corrupt. Implement methods to make the code handle this situation. I came across this information in a Chinese flow meter that registers even turn-on and turn-off. I am trying to implement a hardware that allows detecting the power-off without elements external to the board. • After a turn-off, it must return to the previous value of the counter. • Variables to store: 1. Long type counter managed by external interrupt. It takes precedence over any other process that is performed. Because it is a low frequency signal, it can detect edges. 2. Level. Floating obtained from calculations with the ADC value. 3. Flow. Float that is obtained from the subtraction between the current counter minus the counter for the previous hour. 4. Date (dd / mm / year). 5. Time (hh: mm: ss). • Leave enabled 1 serial ports for SIM800L. • 1 serial ports for MODBUS RTU master (configuration of values using buttons and LCD) I have a prototipe working using serial data extraction but I need to switch to USB. Please only real bids.