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Simple digital wireless BLE oscilloscope

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DIY simple BLE digital oscilloscope     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