BLE-SDK-dat

• programmer - BT-SDK-dat - DPR1112-dat - qualcomm-dat

• CSR8635-dat - CSR-dat - BT-SDK-dat

debugs apps

• BLE蓝牙调试助手.apk.1 - BT-Connect.apk @ BLE-dat

BLE Operations Guide == BT-connect

all steps done by BT-connect

BLE Reading and Writing Bluetooth Data

Connection Process

1. Auto Connection: Click on the Bluetooth device name to automatically connect

2. Custom Characteristic Access:

   • Click on "Custom Characteristic"
   • Click the Read button to read user-defined values
   • After writing data, read it back to verify the written values

Usage Steps

1. Connect to the BLE device by tapping its name
2. Navigate to "Custom Characteristic" section
3. Use Read function to retrieve custom values
4. Use Write function to send data
5. Verify by reading back the written values BLE Tool

select UUID FFE1 == data transceiver

select UUID FFE2 == IO Control

SPP

SPP send and receive

Which BLE Example to Use for Sending ADC Voltage to Phone

Your goal:

• ESP32 reads ADC (battery voltage).
  
• Phone should receive/read the value over BLE.
  

Best Choices

• Notify ✅

  • ESP32 acts as a BLE server.
    
  • Sends automatic notifications with the ADC voltage.
    
  • Best if you want real-time updates on your phone.
    

• Server ✅

  • ESP32 acts as a BLE server.
    
  • Phone connects and reads the ADC value on demand.
    
  • Good if you don’t need constant updates.
    

• UART ✅

  • Implements a BLE serial-like service.
    
  • You can "print" ADC values and read them with a BLE UART app.
    
  • Easiest for testing/debugging, but less standard.
    

Not Suitable

• Beacon / iBeacon / EddystoneTLM_Beacon / EddystoneURL_Beacon ❌

  • These only broadcast fixed or simple data.
    
  • Not designed for continuous ADC updates.
    

• Scan / Beacon_Scanner / Client / Client_secure_static_passkey ❌

  • These examples make ESP32 a client/scanner, not a server.
    
  • Your phone should be the client, so not useful here.
    

• BLE5_extended_scan / BLE5_multi_advertising / BLE5_periodic_advertising / BLE5_periodic_sync ❌

  • Advanced BLE5 features (scanning, multi-adv, periodic sync).
    
  • Not needed for simple ADC-to-phone communication.
    

• Server_multiconnect / Server_secure_authorization / Server_secure_static_passkey ❌

  • Variants of the Server example with multi-client or security features.
    
  • Only needed if you want multiple phones connected or secure pairing.
    

ref

• bluetooth-dat