Thermocouple Data Logger Firmware

I need firmware developed to record data from Type K thermocouples. The data logging frequency is every second, and the recorded data should be saved in a CSV file format. There will be two parts one modules, one recorder. Each module can record 10 channels of Thermocouple and send data over CAN line, multiple module shall be connected with CAN line in series and at the end there will be Recorder connected with software selectable termination of 120 ohm. Each module will have two CAN power for CAN H and CAN L interface along with power input +supply and GND. one port will be used to connecte each module in series and the last moduel other port will be used to terminate the can communication using 120 ohm termination plug. Use 5 pin small Lemosa connector for development of CAN line. The modules shall be small in size. The recorder shall be fast mircrontroller board may Teensy or better to handle data coming from multiple module. The system shall have capability to extend channels upto 250 thermocouple data recording. The recorder shall have SD card slot to record data on the SD card and there shall be suitble communication May be LAN, Bluetooth and Wifi to connect with laptop to configure the recorder to detect connected modules to the recorder/datalogger and to configure sampling rate and channel names. The software shall be easy to use and shall be developped on latest technology and language. There shall be function to activate software by the user using the 4x6 letter key first time. There shall be button in the software to start recording and stopping the recording. There shall be option to select where to record data either on SD card, Local on computer, SD card and Computer. If logger disconnects with the computer in any condition and reconnects it shall be detected and pop up message shall be there for user. If recording was selected in SD card the logging shall be continue even if logger disconnects with the computer.

Requirements:
- Expertise in embedded systems and firmware development.
- Experience with thermocouple data acquisition.
- Proficiency in handling data logging at high frequencies (every second) and with different sampling rate 1 s, 2s, 5, 10s, 20, 30s, 1minute, 5minute, 10minute, 30minute, 1 hour.
- Ability to format and output data in CSV.

Ideal Skills:
- Embedded C/C++ programming.
- Knowledge of Type K thermocouple and associated circuitry.
- Experience with microcontrollers and data logging applications.
- Familiarity with CSV file generation and manipulation.

Looking for a skilled developer who can deliver accurate and reliable firmware for this application.