1. Purpose
In the actual product release, if you do not protect the program stored in the microcontroller Flash, it is possible for some unscrupulous companies to read back the program in Flash through an emulator (J-Link, ST-Link, etc.). , get bin file or hex file, then go to the cottage product. So we need to protect the program. A relatively simple and reliable method is to set the Flash to read protection.
2, development environment
1, for the chip: STM32F4 all the chips
2, firmware library: STM32F4xx_DSP_StdPeriph_Lib_V1.8.0
3, IDE: MDK517
3, program source code 
No-encapsulated Sensor
No-encapsulated type NTC temperature sensor with the properties of sensitiveness, fast response, high temperature resistance, good appearance and protection has been used into oven, air conditioner, induction cooker, refrigerator and so on. Temperature range is from -30°C to 250°C.
No-Encapsulated Sensor,Oven Temperature Sensor,Air-Conditioner Sensor,Refrigerator Sensor
Feyvan Electronics Technology Co., Ltd. , https://www.fv-cable-assembly.com