Bluetooth Low Energy IOT

Cheap and simple DIY bluetooth low energy digital oscilloscope made with JDY-08 BLE module and STM8S103 module and Li ION battery. Android application is developed to display oscilloscope data.  STM8S103 is 8-bit microcontroller with 1024 bytes RAM and 8 kbytes Flash memory. It stores 300 samples of 10 bit ADC data to RAM memory. Minimum sampling period is 5 us (200 kSamples/s).  ADC data is sent trough BLE lin k to Android smartphone application.  Circuit diagram

Low cost digital scope demo What is needed for 200 ksamples/s low cost digital oscilloscope? - STM8S103  8 bit microcontroller board - JDY-08 or HM-10 Bluetooth Low Energy module   BLE module JDY-08 baud rate configured from 115200 to 9600 baud with  AT+BOUD4 and  connect  UART interface to  STM8S103 module D5 , D6 pins. Also connect 3V3 and GND pins.  Pin D3 is analog input and sample square wave signal from pin D4 can be connected to D3 pin.   and flash the STM8S module with  STLINK V2        - Android version higher than 4.4 tablet or phone - Android application:  Files:  STM8S103  workspace: https://drive.google.com/open?id=1AE9GWQkEfnruJqCoOZZ8En2HRbbqVAGk Android application: https://drive.google.com/open?id=1mBzibPZZsOZBEJ6Af1UAY8PY7eq_tf9c