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send integer through Bluetooth from TM4C123 microcontroller

i want to send Temperature sensor and Co2 sensor reading form Tm4C123 vis Bluetooth to app on the phone. I have some code here, i can display CO2 and Temperature reading on the LCD screen, but i can not send these through UART. Hoping anyone can give me some points. Thanks

this is mu Main code

this is my Bluetooth library

this is my temperature code

this is mu CO2 sensor code

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